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Mathematics Questions and Answers April 02, 2023

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In a repeated-measures analysis of variance, how does the magnitude of the mean differences from one treatment to another contribute to the F-ratio? The mean differences add to the numerator of the F-ratio. The mean differences add to the denominator of the F-ratio. The mean differences add to both the numerator and the denominator of the F-ratio.

A psychologist is interested in knowing whether adults who were bullied as children differ from the general population in terms of their empathy for others. On a questionnaire designed to measure empathy, the mean score for the general population is 44.37. Random sampling of 112 scores obtained from individuals who were bullied yielded a mean of

4.The acceptable level for insect filth in a certain food item is 5 insect fragments (larvae, eggs, body parts, and so on) per 10 grams. A simple random sample of 40 ten-gram portions of the food item is obtained and results in a sample mean of x = 5.4 insect fragments per ten-gram portion. Complete parts (a) through (c) below. (a) Why is the

How can this be interpreted combinatorially? If we take the set of objects to be A = {0, 1, 2, 3, 4, 5,.....,n} \f
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Compute the mean and variance of the following discrete and probability distribution. x 2 8 10 p (x) .50.30.20

3. The following table shows summary data on mercury concentration in sahnons (in ppm) from two different areas of the Pacic OceanAl .'J Area 1: m = 15, f = 0.0860, S1 = 0.00324l Area 2: n = 15, 37 = 0.0884, S1 = 0.00284l 'J Do the data suggest that the mercury concentration is higher in sahnons from Area 2? Assume equal variance and use on =
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3. Based on available information, lead-time demand for PC jump drives averages 50 units (normally distributed), with a standard deviation of 5 drives. Management wants a 97% service level. Assume the standard deviation and lead time use the same units. a. What value of Z should be applied? b. How many drives should be carried as safety stock? c.

Consider a business model in which two products, X and Y are produced. There are 160 pounds of material and 120 hours of labor available. It requires4 pounds of material and 2 hours of labor to produce one unit of X. It requires 4 pounds of material and 6 units of labor to produce one unit of Y. The profit for X is $35 and the profit for Y is $55.

Final Prob 3.) A sales force manager is interested in the effects of training on a group of sales people. She is convinced to a successful career in sales. Yet, she also concedes that other factors may be responsible for greater success in sale education (college or no college). She has compiled some data on 36 sales people that might be able to

Flextrola, a case for newsvendor model Flextrola, Inc., an electronic systems integrator, is planning to design a key component for their next generation product with Solectrics. Flextrola will integrate the component with some software and then sell it to consumers. Given the short life cycles of such products and the long lead times quoted by

I am using statistics software for a t-stat project. I have the following hypothesis: H 0 : = 16.7 H A : > 16.7 My sample of 40 has a mean of 20.95 and software is calculating Standard Error of1.1766696, with t t-stat of3.6118891. I also need to illustrate how t-stat was calculated; however, when I plug these numbers into the t-stat equation:

7. Large reservoirs of oil found underground are under very high pressure, which allows the oil to be pumped to the surface. All oil fields contain some water, and as water is pumped back into a well in order to maintain high pressure, the water content increases. Suppose the proportion of water in a randomly selected barrel of oil pumped to the

Best-fit Line and Regression Line Predictions from Best-fit Lines By observing another set of data values, Tasha used a calculator for the tire diameter at the tread and circumference data and got an equation for the least-squares line: = 0.1 + 3.1x. Using this equation to predict circumference from diameter at the tread, the circumference for a

College University of Virginia University of Richmond George Mason University Washington and Lee University Virginia Tech Virginia Commonwealth University College of William and Mary Old Dominion University Christopher Newport University Hampden-Sydney College James Madison University Marymount University Roanoke College University of Mary

The manager of a health food store has determined that the weekly demand, X, for a popular type of granola is a normally distributed random variable with mean 85 pounds and standard deviation 5 pounds. the manager notices that over the last month, the weekly demands have been slightly higher than usual. She decides that if the total demand over

How can I simplify the following expression? I am stuck on the first move....thanks in advance! \f
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Acrylic bone cement is commonly used in total joint replacement to secure the artificial joint. Data on the force (measured in Newtons,N) required to break a cement bond was determined under two different temperature conditions and in two different mediums appear in the following table. Temperature Medium Data on Breaking Force 22 degrees Dry

the freedman's ANOVA by rank doesn't necessitate post HOC Analyses. is this true or false?

Observation Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 Gender M M F M F F F M M M M M M F M F M F F F M F M F F F M F M M M M F M F F M F F M F F M F F F F Country of Citizenship Australia Australia Australia Australia Australia Australia Australia

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Define appropriate academic research . Define quantitative research and qualitative research . Explain how they differ, and relate each to the human services field and the scientific method. Describe how to decide whether to use a quantitative or a qualitative research methodology. Provide examples of what sort of study is appropriate for each

I understand question 2 (number 2 will be a comparison of the differences between the 2017 and 2016 figures) and 3 but am stuck with #1 and how to complete it in excel. I can't find the formula in excel. Can someone help guide me through the steps on what I am looking to do to get this assignment done. I am not looking for the answers but how to

in one hundred and fifty words i need someone to explain to me that Suppose there are two events A and B. Can P(AUB) is greater than or equal to P(A)? Discuss why (or why not)

We have 30 pairs of data with a mean of differences of 125 and standard deviation of 2000. Test the claim that the mean difference is positive at = 0.01. Enter the standard error with 3 decimal places.

In the game of blackjack as played in casinos in Las Vegas, Atlantic City, Niagara Falls, as well as many other cities, the dealer has the advantage. Most players do not play very well. As a result, the probability that the average player wins a hand is about 0.37. Find the probability that an average player wins A. twice in 5 hands. Probability =

The students in Ms. Ramirezs math class have birthdays in each of the four seasons. Table 2.40 shows the four seasons, the number of students who have birthdays in each season, and the percentage (%) of students in each group. Construct a bar graph showing the number of students. Label in APA 6 th edition style. Seasons Number of students

Chapter 6, Section 6, Exercise 136 Use the 1 -distribution and the sample results to complete the test of the hypotheses. Use a 5% significance level. Assume the results come from a random sample, and if the sample size is small, assume the underlying distribution is relatively normal. Test H0 : iU =100 vs Ha : U {100 using the sample results 2 =
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Math 118 Final Project: Statistics Name 1. Create a survey question for data that is normally distributed. 2. Collect data from 30 random people. Record your results in the table below. 3. Make a frequency distribution table with your results. Make sure your columns are labeled. 4. Make a frequency histogram. Include word labels for the horizontal

My research questions are: Can the aerospace manufacturing industry improve existing materials to be more efficient without requiring too much additional costs? Can new materials be developed that are more cost effective and do not sacrifice the overall safety of the aircraft? Can manufacturing methods be modified to improve overall cost and not

The enrollment of the district was 1112 last year and is 1400 this year. Calculate the relative percentagechange, rounded to the nearest percent. A. 21% B. 126% C. 79% D. 26%

Possible Multiple Choice Questions for the Exam. Focus on the topics discussed in class. Chapter 1 Multiple Choice Identify the choice that best completes the statement or answers the question. ____ ____ ____ ____ ____ ____ ____ ____ 1. In social research the purpose of statistics is to a. prove that the research theory is correct b. validate the

Suppose a large shipment of microwave ovens contained 10% defectives. If a sample of size 224 is selected, what is the probability that the sample proportion will be greater than 13% ? Round your answer to four decimal places.

Assignment Mini-Project 3-3 Purpose of Assignment This assignment provided students with practice in understanding the relationship of averages and standard deviation to make an informed business decision about the gross income performance of each movie genre. Students will learn to implement the use of these statistical measures for better

Calculate the Pearson r Interpret the correlation coefficient for a two tailed test: Can you reject null hypothesis and if so with what level of confidence? Only these three questions \f
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STAT 2507; BIT2000 Fall 2017 Some sample questions for the term test (the actual test can have more questions) THE MIDTERM TEST COVERS CHAPTERS 1-6 INCLUSIVE. Question 1. Consider the distribution of measurements above. Which of the following are true? I) The mean exceeds the median. II) The interquartile range is less than 45. III) The

Colgate-Palmolive Company has just paid an annual dividend of $1.92 . Analysts are predicting dividends to grow by $0.11 per year over the next five years. After then, Colgate's earnings are expected to grow 6.9% per year, and its dividend payout rate will remain constant. If Colgate's equity cost of capital is 9.4% per year, what price does the

1. Several trucks arrive each day for unloading at a warehouse. An employee of the warehouse maintained for 200 days a count of the number arriving each day. This information was used to develop the probability distribution below. X P(X) 4 5 6 7 0.10 0.20 0.30 0.40 1.00 (a). Determine the expected value and the standard deviation of the number of

A study was conducted at a local college to analyze the average GPA of students graduated from UWGB in 2014. 100 students graduated from UWGB in 2014 were randomly selected, and the average GPA for the group is 3.5. The value 3.5 is a (i) statistic (ii) parameter (iii) cannot be determined

Please explain the working not just answers. thank you A cannery claims that its sardine cans have weight of 8oz., with a standard deviation of 0.15oz. You take a simple random sample of 30 cans and encounter a sample mean of 8.15 oz. Are you inclined to believe the claim? a.(Yes or No) b. Why/why not? A simple random sample of 10 employees of a

1.An offshore platform consists of three large main power generators (MPGs), two operating and one spare (standby mode). The lifetime of each MPG follows the Weibull distribution with beta = 2.3 and theta = 40 years. In a given time, two MPGs are used, while third one can be used to replace a failed unit in 12 days with a cost of $ 5 million. The

The American Water Works Association reports that the per capita water use in a single-family home is 74 gallons per day. Legacy Ranch is a relatively new housing development. The builders installed more efficient water fixtures, such as low-flush toilets, and subsequently conducted a survey of the residences. Twenty-five owners responded, and the

Consider the following hypothesis: Ho: mean=7 H1: mean7 A test if formed with a sample of size 36 the sample size was 2.06 and the population deviation is 18 Assume that the population is approximately normal. Use the TI-84 calculator to compute the P-value. Round to four decimal places.

Analyze the data from Part 1 using Microsoft Excel software. Write a 700- to 875-word paper that includes the following information: Describe what method you are using to compare groups. Copy and paste the output into a Microsoft Word document, and also answer the following questions: oWhat is the significance level of the comparison? oWhat was

2175-6362-US1 13. An insurance company checks police records on 600 randomly selected auto accidents and notes that teenagers were at the wheel in 90 of them. Construct a 95% confidence interval estimate of the proportion of auto accidents that involve teenage drivers. Show all work. Just the answer, without supporting work, will receive no

The company decided to use different balloon categories.Their prices (on 100 units) are listed below: 30251130322027153880 22161839123017172320 Construct a grouped frequency distribution and a cumulative frequency distribution with 6 classes . 2.Grouped Frequency Distribution 3. For the set of data given above (on point C), calculate the following

Let x determine a randomvariable, and use your knowledge of probability to prepare a probability distribution. A family has four four children and the number of girl girl s is recorded.(Assume an equal chance of a boy or girl for eachbirth.) Complete the probability distribution.

On a recent trip home for summer break, your grandfather tells you that he has purchased the stock of two firms in the automobile industry: Toyota and Ford.He goes on to discuss the merits of his decision and one of the points he makes is that he has avoided the risk of purchasing only one company's stock by diversifying his holdings across two

In which of the following situations would it be necessary to use a between-groups ANOVA? A longitudinal study follows a group of kindergarten children through high school and assesses their body mass index at four timepoints. A researcher classifies a group of college students on the basis of their political leanings as liberal, conservative,

1. A researcher believed that women in their 20s drank more soda per day than men. Which of the following was the null hypothesis? a. The amount of Soda women drank per day was greater than the amount of Soda men drank per day b. The amount of Soda women drank per day was equal to the amount of Soda men drank per day c. The amount of Soda women

CBSPALASS - 2306 - 4580 - BODE - FD23 BLASE 750 * inal - 81720 # 43 5 OF & Your friend Zack is counting ducks , there are two types ducks; the left-duck and the right- duck ; Notice that a left-duck can be dissected into four smaller ducks : three right- ducks ( once rotated ) and one left- duck . A second dissection results in each of these new
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The State Department of Weights and Measures is responsible for making sure that the commercial weighing and measuring devices such as scales are accurate so customers and businesses are not cheated. Periodically employees of the department go to businesses and test their scales. For example, a dairy bottles milk in 1-gallon containers. Suppose

Geometric mean is often used in finance and economics for finding average rates of change, average rates of growth, or average ratios. Given n values (all positive), the geometric mean is the nth root of their product. The average growth factor for money compounded at annual interest rates of 17%, 37%, 14%, and 22% can be found by computing the

A population of beetles grows according to the model A=500300e0.04t, where t is measured in weeks. What is the initial population of beetles? Graph this function, and use the graph to determine what happens to the population as time goes by. At what time will the population reach 400 beetles?

According to the census bureau, 3.13 people reside in the typical american household a residents per household was 2.86 residents. The standard deviation of this sample was 1.30 residents . At the 0.05 significance level, is it reasonable to conclude the mean number of residents in the retirement community household is less than 3.13 persons. What

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Interpret the following 95% confidence interval for mean weekly salaries of shift managers at Guiseppe's Pizza and Pasta. 325.80 < < 472.30

A study is done to determine which of two soft drinks has more sugar. There are 13 cans of Beverage A in a sample and six cans of Beverage B. The mean amount of sugar in Beverage A is 36 grams with a standard deviation of 0.6 grams. The mean amount of sugar in Beverage B is 38 grams with a standard deviation of 0.8 grams. The researchers believe

Twenty-five percent of all automobiles undergoing an emissions inspection at a certain inspection station fail the inspection. (Round all answers to three decimal places.) (a) Among18randomly selected cars, what is the probability that at most6fail the inspection? (b) Among18randomly selected cars, what is the probability that

In a study of the relationship between pet ownership and physical activity in older adults,591subjects reported that they owned a pet, while1938reported that they did not. Give a99%confidence interval for the proportion of older adults in this population who are pet owners. (Round your answers to three decimal places.) Lower limit Upper limit

The following contingency table summarizes the number of students at a college who have a Mastercard or a Visa credit card. (show all the calculations) Have Visa Don't have Visa Total Have MasterCard 1,000 1,500 2,500 Don't have MasterCard 3,000 4,500 7,500 Total 4,000 6,000 10,000 Find the probability that a randomly selected student: (1)Has a

ANALYZE 3 OF THESE COMMENTS ABOUT STATISTICS. WHAT CAN YOU ADD? DO YOU AGREE? WRITE ABOUT EACH ONE! 1) BERNIE Interval scales are numerical scales in which intervals have the same interpretation.If we are using 0 to represent a male and 1 to represent a female then it can be misrepresented because interval scales are numeric scales. Ratio scales

Task 1:Research the field of meteorology. Although you may not be interested in becoming a meteorologist, weather affects us all every day. What you may not know is that a concept you have been studying in our College Algebra class is used quite often in the field. To begin this semester project, briefly perform each of the following: Write an

If the order of objects is not ofimportance, how many ways can twelve objects be selected two at atime? Why is this result different from the result when ordermatters? There are ____ different ways to select two objects at a time.

7. Let X1....,Xn lit} Uniform(0,1). Find the probability density function for V = Yn Y1, where Y1 =min{X1,...,Xn} and Yn =max{X1,...,Xn}. 8. A scale measures weight in pounds, that are distributed following a normal distribution with an un known variance. Suppose we estimate the variance to be 32 from n = 9 random sample of measure ments. Find a
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The National Institute of Standards and Technology (NIST) supplies "standard materials" whose physical properties are supposed to be known. For example, you can buy from NIST an iron rod whose electrical conductivity is supposed to be 10.1 at 293 kelvin. (The units for conductivity are microsiemens per centimeter. Distilled water has conductivity

Question: For the followingsituation, (a) an equation in the form y=mx+b (b) find and interpret the ordered pair associated with the equation for x= 5 and (c) answer the question. A ticket for a show costs $ 113.50. A parking pass costs $ 12 Let x represent the number of tickets and y represent the cost. How much does it cost for 4 tickets and a

A population has a mean of 68 and a standard deviation of 14. If we take repeated sample of size 49 from this population what would the mean of the sampling distribution for the sample mean be? A population has a mean of 68 and a standard deviation of 14. If we take repeated sample of size 49 from this population, what would the standard deviation

Assessment 7 Scenarios Part A: Accounting Specializations Evaluate the following activities and functions and align them with the accounting specializations below, providing a detailed rationale for the alignment. Audit activities focusing on efficiency. Specialists in physical evidence indicating fraud. Independence from the organization

More than 100 million people around the world are not getting enough sleep; the average adult needs between 7.5 and 8 hours of sleep per night. College students are particularly at risk of not getting enough shut-eye. A recent survey of several thousand college students indicated that the total hours of sleep time per night, denoted by the random

Exercise 9-7 Bob Nale is the owner of Nale's Quick Fill. Bob would like to estimate the mean number of gallons of gasoline sold to his customers. Assume the number of gallons sold follows the normal distribution with a populationstandard deviation of 2.50 gallons. From his records, he selects a random sample of 45 sales and finds the mean number

EMPIRE STATE COLLEGE MBA/PM Certificate Program Assignment #8 - Falls Department Stores Data Analysis Using Excel Pivot Tables Falls Department Stores, with corporate headquarters in Portland, Oregon, operates department stores in midsize towns in selected northwestern areas. Although the organization maintains a large computer system for its

For each of the following indicate whether the expected relationship between the two variables will be positive (+), negative (-), or zero (0). a. Air Temperature and the amount of snow on the ground. b. the number of minutes of exercise per day and the score on a physical fitness test, c. the number of years having a drivers license and age. d.

What can you tell about the values of these two expressions without solving them? 4 [(8 / 3) + 5] and 2. 8[ (8 / 3) + 5]

mary will walk one day and swim one day. she does at most one activity on any particular day. how many ways are there for her to select her workout schedule (i.e. which activities her does which days)?

Choose one of the items, determine the descriptive statistic that is reported, and indicate what it means. For example, \"What is the highest level of education of this group?\" Well what does the data say?? Please read the above launch question and get ready to share what you find. Please, review what others have identified first so you don't

Hi, I need help with this answer in Excel. The Laurenster Corporation is getting into the construction business. A list of activities and their optimistic, most likely, and pessimistic completion times are given in the following table for the next construction project. \f
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Sturges's Rule is a rule of thumb for the number of bins in a frequency distribution. Sample Size* 16 32 64 128 256 512 1024 Number of Bins 5 6 7 8 9 10 11 * The number given is the upper limit of the sample size. So for a sample size of 100 Sturges's Rule suggests 8 bins For sample sizes larger than 1024 just conintue the pattern shown in the

The number of candy pieces in a bag is calculated for a sample of 40 bags of a particular manufacture. Based on this data, the sample mean is 25.30 pieces. The population standard deviation is to be 3.2 (remember this is the unrealistic part, we would not really know this). Which below is a 95% confidence interval for the mean number of pieces of
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The mean length of a product from a process has a mean 11.2 in and a standard deviation 0.40 in.Assume the lengths are normally distribution. a.What is the probability that a randomly selected product has a length less than 10.5 in?Find the corresponding area under the normal curve. b.4% of the product measure length more than what value?

Suppose the transit system of a large city has a lost and found department that keeps detailed records, including the estimated value in dollars of each lost item. Each year the department publishes a report with a histogram showing the proportion of items lost in various price ranges. The bar on the histogram with endpoints 100 to 200 has a

A limnologist wishes to estimate the mean phosphate content per unit volume of the lake water. It is known from studies in previous years that the standard deviation has a fairly stable value of . How many water samples must the limnologist analyze to be 90% certain that the error of estimation does not exceed 0.8 milligrams?

a manufacturer claims the life span of its tires is 53,000 miles. you work for a consumer protection agency and you are testing these tires. assume the life spans of tires are normally distributed. you select 100 tires at random and test them. the mean life span is 52,863 miles. assume the standard deviation is 700. what is the probability that

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Quality managers at centralGen say that 12% of letters they post contain errors. A sample of 200 letters was checked and 31 of them contained errors. What do these results suggest?

Is the square footage of a house a discrete random variable, a continuous random variable, or not a random variable? A. The random variable is discrete. The possible values are a=1,2,3,.... B. The random variable is continuous. The possible values are a greater than a>0. C. The random variable is continuous. The possible values are a=1,2,3,.... D.

Exhibit A. The ABC Company operates 5 plants and 3 distribution centers, all in different cities. Following table lists the unit shipping costs for its supply network of a major product. The annual demand at the distribution centers are as follows. The annual capacity and annual fixed cost at plants are as follows. Currently, the plants produce

Which of the following is an example of a seasonal pattern in data? The sales on Friday are typically lower than on other days of the week. There is a consistent upward trend in data from year to year. The volume of calls is dependent upon the product release schedule. The data exhibits an exponentially smoothed pattern. None of the above

The mean is the number that perfectly balances the: number of scores in the data set, such that half fall above the mean and half fall below. the scores around the mean, such that the sum of the deviations for scores above the mean exactly equals the sum of the deviations for scores below the mean. two most extreme scores in the data set. even and

Please provide work in excel. DO NOT round any number, and please keep at least 2 decimal places for the answers. Problems #2 need to be solved by the graphical method, not the corner point method. Excel wont generate graphs for you, you need to create the lines on Excel spreadsheet. Do NOT use QM for Windows. The seasonal yield of olives in a

1) During the measure phase of a Six Sigma project a building society collected data on the me taken (measured as working days rounded to the nearest day) to process mortgage loan applications. The data are stored in the supplied worksheet Loans l.MTW. Display and summarize the data and comment on the shape of the distribution. Use a stem-and-

Can you show work for this step by step 1.The correlation between the number of cans of soda a person consumes weekly and the number of cavities theperson has at the age of 18 is 0.78. If the personhas a z score of 1.2 on the soda-consumed variable, the z score on the variable number of cavities will be: 2.If the correlation between the number of

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1) A man pays $160 a year for a life insurance policy with a coverage of $145,000 payable to his survivor upon his death. The probability that he will live through the year is 0.9992. a. (0.25 points) Supply the probability table for this problem. (In this case the outcomes X are the possible payouts (positive or negative) the man might receive.

According to the empirical rule, if the data form a bell-shape curve( normal distribution), approximately what percent of the observations will be contained within +_ 2 standard deviations from the arithmetic mean. A. 99.7 B. 95.0 C. 68.3 D. 75.0

2. (12 points) To demonstrate your \"expertise\" in recognizing and solving conditional probability problems, set up one, no matter how simple, based on a statistical experiment that involves rolling a pair of six-sided, fair dice; then, (a) clearly define your problem. (b) showing your work, clearly use an applicable formula or relationship to

Week 4 Calisha Jameson 8. Assume the speed of vehicles along a stretch of I-10 has an approximately normal distribution with a mean of 71 mph and a standard deviation of 8 mph. a. The current speed limit is 65 mph. What is the proportion of vehicles less than or equal to the speed limit? 71 mph; 8 mph (65,71,8, true) = .2266 The proportion of

1. Two cards are drawn from a standard deck of 52 cards. What is the probability that each occurs? Please show work. a.) 2 red cards or 2 jacks b.) 2 spades or 2 face cards 2. Three dice are tossed. What is the probability that each occurs? Please show work. a.) exactly two 5s b.) at least two 5s

Example #1 1. What are the effects of the material type and temperature in the life of a battery? 2. Is there any material selection that maximizes its life? Example #2 Response: the performance of a chemical process is studied. It is thought that the two most important variables: pressure and temperature. Three levels of each factor are selected

As part of a long-term study of individuals 65 years of age or older, sociologists and physicians at the Wentworth medical Center in upstate New York investigated the relationship between geographic location and depression. A sample of 60 individuals, all in reasonably good health, was selected; 20 individuals were residents of Florida, 20 were

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