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Mathematics Questions and Answers April 01, 2023

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Newspaper headlines at the time and traditional wisdom in the succeeding decades have held that women and children escaped a sunken ship in greater proportion than men.Here's a table with the relevant data. Do you think that survival was independent of whether the person was male orfemale? Defend your conclusion. Female Male Total Alive 367 299

When bondingteeth, orthodontists must maintain a dry field. A new bonding adhesive has been developed to eliminate the necessity of a dry field.However, there is concern that the new bonding adhesive is not as strong as the currentstandard, a composite adhesive. Tests on a sample of 9 extracted teeth bonded with the new adhesive resulted in a mean

Find the critical valueneeded to construct a confidence of the given level with the given sample size. - A. B. C. D. Confidence Level 90%, sample size 6 - A. B. C. D. Confidence Level 98%, sample size 12 - A. B. C. D. Confidence Level 95, sample size 32 - A. B. C. D. Confidence level 99,sample size 10 A.3.250 B.2.718 C.2.015 D.2.040

1) A company has estimated the standard deviation of individual sales transactions to be $2000. Approximately 100 sales transactions take place each week. What is an estimate of the standard error of the average weekly sales? 2)A commodity trader who usually makes around 25 transactions per week obtained the following graph showing the average
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Problem 1. Suppose that each day the price of a stock moves up 1/8th of a point with probability 1/3 and moves down 1/8th of a point with probability 2/3. If the price fluctuations from one day to the next are independent, what is the probability that after six days the stock has its original price? [Hint: Use the binomial.] Problem 2. Suppose we

For the following z-test statistic, compute the p-value assuming that the hypothesis test is a one-tailed test: z= -1.55 a) 0.0172 b) 0.0606 c) 0.1512 d) 0.0901

Which of the following are features of a normal distribution? Symmetric shape Can be used to represent sample means It is used in statistical process control Can be used to describe a random variable All of the above

ustion 1: Comparing means again (25 points) Based on an episode of the popular TV series \"Futurama\" Similar to assignment 2 question 4. Suppose that you want to assess the performance of a new treatment for tritonian yetiism. The onset of yetiism is measured by the amount of yeti neurotoxin in the patient's blood. The concentration of this

Years 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 US Population over 65Net Operating Cash Flow (Billion) 12.46 26.3 12.58 27.6 12.75 31.4 12.97 33.4 13.24 29.8 13.56 31.49 13.90 38.82 14.27 30.63 14.64 38.93 15.03 22.72 SUMMARY OUTPUT Regression Statistics Multiple R R Square Adjusted R Square Standard Error Observations ANOVA Regression

Can you solve (a) and (b) with detailed explanation. Thanks! \f
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A car-rental company is interested in the amount of time its vehicles are out of operation for repair work. State all assumptions and find a 90 % confidence interval for the mean number of days in a year that all vehicles in the company's fleet are out of operation if a random sample of 10 cars showed the following number of days that each had

1. True/False: The best way to describe a skewed distribution is to report the mean. 2. What percentage of the following scores fall within two standard deviations from the mean? 54, 52, 51, 50, 36, 55, 44, 46, 57, 44, 43, 52, 38, 46, 55, 34, 44, 39, 43, 36, 55, 57, 36, 46,49, 46, 49, 47 3. Given a test that is normally distributed with a mean of

Help 2 Question 1: Contingency Tables A sample of shoppers was selected and asked questions regarding consumer behavior. One of the questions asked was "Do you enjoy shopping for clothing?" Information regarding the responses is below: Total Responses: 500 Males: 136 responded "yes" and 104 responded "no" Females: 224 responded "yes" and 36

1. A new screening tool to detect lung cancer was recently developed by a group of researchers at the Medical University of South Carolina (MUSC). Computerized Axial Tomography (CAT) scanning of the chest is one of the best approaches currently being used to screen for lung cancer. The MUSC research group is trying to determine whether their

A normal population has a mean of 65 and a standard deviation of 12. You select a random sample of 9. Compute the probability the sample mean is (Round z values to 2 decimal places and final answers to 4 decimal places) : a. Greater than 68. Probability b. Less than 61. Probability c. Between 61 and 68. Probability

If two events, Event A with probability P(A) and Event B with probability P(B) are mutually exclusive (i.e. disjoint), then __________. Select one: a. P(B) = 1 P(A) b. P(A and B) = 0 c. P(A and B) = P(A) + P(B) d. P(A and B) = P(A)P(B)

Descriptive Statistics Mean Std. Deviation N Tot_und 40.3333 2.10339 12 Church_Attend 41.9167 8.41490 12 Correlations Tot_und Church_Attend Tot_und Pearson Correlation 1 -.183 Sig. (2-tailed) .569 N 12 12 Church_Attend Pearson Correlation -.183 1 Sig. (2-tailed) .569 N 12 12 Please help me with the interpretation in APA

A sports psychologist tested whether the number of team wins in the previous season can predict the number of wins in the following season in a sample of30teams. Complete the regression table for this hypothetical study. (Round your value for F obt to two decimal places.)Source of Variation SSdfMSF obt Regression46Residual (error)6Total Make a

STAT 200: Introduction to Statistics Final Examination, Spring 2017 OL1/US1 Page 1 of 8 STAT 200 OL1/US1 Sections Final Exam Spring 2017 The final exam will be posted at 12:01 am on March 3, and it is due at 11:59 pm on March 5, 2017. Eastern Time is our reference time. This is an open-book exam. You may refer to your text and other course

Multicollinearity can be detected from t tests of the predictor variables? True or false

Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p . n = 195, x = 162; 95% confidence

1. 1. Set up a Github account (you may use your own name or a pseudonym). 2. Create a repo called datasciencecoursera 3. Submit the link to your GitHub account (or a direct link to your datasciencecoursera repo) Provide that link here Question 2. 1. 2. Create a text file called HelloWorld.md Add the line "## This is a markdown file" (without the

List the simple events for each of the following statistical experiments in a sample space. A= one role of a dice. Note: separate your response with a comma (,). For example 22, 23,24; B= Three tosses of a coin. Note: Use this notation for your answer. heads=H. tails = T. For example HT, TH; C= one toss of a coin and one roll of a dice. Note: Use

True or False: An estimate of the population standard deviation could be the sample range of data divided by 6

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It might be appreciated that you help me to figure out answers and steps too.. I don't know where to start with.. so please give me detailed steps. Question 4 (30 marks) Let F =(yz +zcosx)i +(cxz )j + (xy + sin x)k , where c is a constant. (a) Find the constant c such that F is irrotational. (10 marks) (b) With c obtained in (a), find a potential
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Ed is 7 years older than half Jed's age. Together, their ages are 46. How old is Ed?

A colony of bacteria is growing in a petri dish which has a maximum capacity of 100 mg. The mass of bacteria is increasing at a rate given by the logistic equation. Initially there is 2mg of bacteria and the rate of increase is 1mg per day. Write down the logistic equation satisfied by the mass, m. m' = When will the mass of bacteria be 50mg?
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Name: __________________________ Due: ______________ Dependent-Samples Lab Please type the answers into this worksheet. Be paste a copy of the SPSS output for each of your analyses to the end of the assignment. EXPERIMENT 1 In class one day last semester, I randomly assigned students to one of two groups as they came into class. The first person

ID Salary 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 57.7 27.3 35.5 60.9 47 72.8 41.8 21.8 76.3 22.5 22.8 64.5 41.4 23.1 23.5 47.9 67 35.2 24.3 33.6 77.5 53.6 22.9 61.2 24.5 22.3 38.4 75.3 73.2 49.5 23.9 27.2 61.8 28.1 24.5 23 23.6 59.7 34.4 23.9 40.6 23.3 77.3 62.3

Fifty fifth-grade students from each of four city schools were given a standardized fifth-grade reading test. After grading, each student was rated as satisfactory or not satisfactory in reading ability, with the following results: School 1 2 3 4 Not satisfactory 7 10 13 6 Is there sufficient evidence to indicate that the percentage of fifth-grade

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can i get the answer to these three questions on preforming the goodness of fit test ' Ix Zm5mw. $.18 :5 22d 9. Ewmm Em" cam" nag958m mun: @3353: 9. wbmimnm :5 9:3ch 505:? :5 3:: 3609mm? mrmgwmg Ecgmmmm' 8m magma? wuzcm' nounammo: 55 :5 3:: 363.33? was man noanEmmo: :6\" 39338 25 01mg\": 2&3. 8V mm535m EN: 0 n mop 8m" Em 233 $3 :5 $03338: 5.6.\":
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Find the following probabilities based on the standard normal variable Z . UseTable 1. (Round your answers to 4 decimal places.) a. P ( Z > 1.05) b. P ( Z 1.96) c. P (0 Z 1.62) d. P (0.62 Z 2.45)

Select all that apply. Which of the following probabilities can be found using the binomial distribution? 1.The probability that 3 out of 8 tosses of a coin will result in heads 2.The probability that Susan will beat Shannon in two of their three tennis matches 3.The probability of rolling at least two 3's and two 4's out of twelve rolls of a die

. A college admissions officer takes a simple random sample of 90 entering freshman and computes their mean mathematics SAT score to be 427. Assume the population standard deviation is 125. What is the lower bound of the 99% confidence level? Round to the nearest integer.

Activity Description Understanding basic numerical values and concepts in measurement is needed to accurately interpret and apply the results of various statistical analyses and assessments. The questions below are designed to reinforce your knowledge of important measurement interpretive skills. For this task you will respond to each question

Week 5 Lecture 13 This week we look at two different approaches to analyzing data and making inferences about the populations they come from. The first is confidence intervals, a range of values that we expect to contain the actual population mean based on the sample results we obtained. The other is a way to use nominal and ordinal data in a

Scientists want to estimate the mean weight of mice after they have been fed a special diet. From previous studies, it is known that the weight is normally distributed with a standard deviation 2 grams. How many mice must be weighed so that a 95% confidence interval will have margin of error of 0.5 grams? Write only an integer as your answer

Base Price $1,699 $1,749 $1,799 $1,849 $1,899 $1,949 Commission 2.5% 3.0% 3.5% 4.0% 4.5% 5.0% Package 10 20 30 40 50 60 70 80 Tour Description Adventures in Canada Check Out the Czech Republic! Croatian Wonders Hong Kong, China Live it Up London Parisian Pleasures Roaming Rome Viva Espaa Departure Base Cost 6/11/2017 $1,699.00 6/4/2017 $1,799.00

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Stat 226 Spring 2017 All Sections Homework 5 Due Monday, March 20, 7pm Submission: via Blackboard 1. Confidence Interval Given. Assume I created a 95% confidence interval for the mean hours studied for a test based on a random sample of 100 students. The lower bound of this interval was 6 and the upper bound was 10. Assume that when I created this

Obtain the five-number summary for the given data. The normal annual precipitation ( in inches) is given below for 21 different U.S. cities. 39.1,30.1,18.5,33.1,27.1,27.8,8.6,23.4,42.6,31.9,21.9,12.0,5.1,14.1,22.8,10.9,16.1,25.4,17.2,14.9,51.7 find low________________ lower quartile_________________ median________________________ upper

Two independent samples from normal distributions are being compared. The sample data are summarized in the table. \f
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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 30.6. Random sampling of 25 scores obtained from individuals who were bullied yielded a mean of

A rainstorm in Portland, Oregon, wiped out the electricity in 10%of the households in the city. Suppose that a random sample of 70Portland households is taken after the rainstorm. Estimate the number of households in the sample that lost electricity by giving the mean of the relevant distribution (that is, theexpectationof the relevantrandom

Even within a particular chain of hotels, lodging during the summer months can vary substantially depending on the type of room and the amenities offered. Suppose that we randomly select 50 billing statements from each of the computer databases of the Hotel A, the Hotel B, and the Hotel C chains, and record the nightly room rates. The means and

The credit scores of 35-year-olds applying for a mortgage at Ulysses Mortgage Associates are normally distributed with a mean of 540 and a standard deviation of 130. (a)Find the credit score that defines the upper 15 percent. (Use Excel or Appendix C to calculate the z -value. Round your final answer to 2 decimal places.) Credit score

discuss a real world scenario that illustrates the order of operations . include a mathematical expression that represents your unique scenario and a steps by steps explanation of how the order of operations is used to find your answer.

Cataracts this is a 3 part question. Thank you ..please if you write it..let it be legible. Thank you. A camera has been developed to detect the presence of catamct more accurately. Using this camera, the gra level of each point [or pixel] in the lens ofa human eye can be characterized irrto 256 gradation, where a gray level of 1 rep resents black
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Determine the required value of the missing probability to make the distribution a discrete probability distribution. \f
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Please show workings: The mean length of six-year-old rainbow trout in the Arolik River in Alaska is 481 millimeters with a standard deviation of 41 millimeters. Assume these lengths are normally distributed. What proportion of six-year-old rainbow trout are less than 497 millimeters long? At a local college, the probability that there are no

12.6 Outsourcing Decision Model Manufactured in-house Fixed cost Unit variable cost Purchased from supplier Unit cost $50,000.00 $125.00 Mean $175.00 S.D. $12.00 Model Min Demand volume Total manufacturing cost Total purchased cost Difference Decision 800 Most Likely 1400 Max 1700 12.7 Outsourcing Decision Model Manufactured in-house Fixed cost

A history class is comprised of 7female and 6male students. If the instructor of the class randomly chooses students from the class for an oral exam, what is the probability that 2female students and 4 male students will be selected? Round your answer to 3decimal places.

1.In order to rule on a potential federal grant, a government official must confirm if the average income in a Pennsylvania county is greater than $12,500. A sample of 28 individuals is taken and shows a sample mean of $13,450 and a sample standard deviation of $3,972. Conduct the test at a 5% level of significance. What is your conclusion? 2.

Finding the present value income for this one problem A charitable organization receives donations from a corporate trust continually at the rate of t) = 6000e0-0\" dollars per year t years from now. If the money ls invested at 5.8% interest (compounded continuously) and the donations continue indenitely, what is the present value of the income?
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This is for a central limit project. Its due today by 3pm. I'm still a little confused on how to get this done. I appreciate your assistance. thank you in advance Question 1. Keep the # of sides on die: 6 Keep the # of dice to roll: 1 Click Tally roll results: Average = 3.5 (The average of all the sides of a die) Question 2. With the same

was administered to all of them. You are interested to know estimate of the population parameters, and a simple random sample of 15 scores was taken from the test results. They are 51, 63, 56, 43, 34, 62, 73, 49, 53, 77, 67, 58, 56, 75, and 65 (these scores are not percentages). Using the Critical Value Method, test the claim that the mean of the

5. A researcher reports that her obtained chi square of -17.56 is significant because it exceeds the critical Chi square of -3.841 for an alpha of .05 with 2 degrees of freedom. What mistake has been made? a. neither critical nor obtained Chi squares can have negative values b. it is impossible to have only 2 degrees of freedom c. it is impossible

when drawn from a normal distribution, 95% fo the sample means will fall within how many standard deviations of the population mean

A random sample of 85 group leaders and supervisors revealed that a person spends a mean of 6.5 years on the job before being promoted.The population standard deviationof the normal distribution is 1.7 years.Using the 95% degree of confidence, what are the limits of the confidence interval for the population mean? A.6.06 and 6.94 B.6.10 and 6.90

Questions on a statistics exam are considered good questions provided the questions discriminate between students who have studied for the exam and those who have not studied. Suppose that on a particular statistics exam the students were separated into two groups, the group that studied and theother group that had not studied. Data was collected

I have a homework assignment I amputting below Module 03 Homework Assignment A nurse at a fertility clinic has a couple who is interested in having three children and wants to know the probability of having exactly one boy. To help the nurse determine the probability of having exactly one boy answer the following questions: Describe the sample

The attitudes of a sample of 12 teachers attending a seminar on mathematical problem solving were measured before and after the seminar. A positive number for change in attitude indicates that a teacher's attitude toward math became more positive. The 12 change scores are as follows: 3 ;8 ;1 ;2 ;0 ;5 ;3 ;1 ;1 ;6 ;5 ;2 Using the data set above,

Nell Company purchases laptops for $365 each and sells them at a profit of $140 ,with overhead expenses of $55 per unit. b) Calculate the amount of markup per laptop.

Compute a 95% confidence interval for the population mean, based on the sample numbers 21, 28, 33, 34, 25, 26, and 135. Which table do we use to find the margin of error? 2. The report of a sample survey of 1014 adults says, "with 95% confidence, between 9% and 15% of all Americans expect to spend more on gifts this year than last year." What does

Suppose a seven-year, $1,000 with a 5.92% coupon rate and semiannual coupons is trading with a yield to maturity of 3.68% (please answer both questions, part a and b) a. Is this bond currently trading at a discount, at par, or at a premium? Select one option below: At a premium because the yield to maturity is greater than the coupon rate. At a

the mean height of a basketball team is 6 feet with a standard deviation of 0.2 feet. the team's center is 6.7 feet tall. find the center z score

The following table cross classifies a sample of 7387 women in the study by how much they drink and whether they had preterm delivery.What is the probability of preterm delivery for women who drink more than 4 glasses of alcohol per day? Drink 1 glass or less Drink 2-4 glasses per day Drink more than 4 glasses per day Preterm 266 74 189 Full Term

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Density SiriBFperc Over45 AbdomenC HipC ThighC WristC 1.0708 12.3 0 154.25 21.9 32 27.4 17.1 1.0853 6.1 0 173.25 23.4 30.5 28.9 18.2 1.0414 25.3 0 154 66.25 28.8 25.2 16.6 1.0751 10.4 0 184.75 22.8 32.4 29.4 18.2 1.034 28.7 0 184.25 71.25 32.2 27.7 17.7 1.0502 20.9 0 210.25 25.6 35.7 30.6 18.8 1.0549 19.2 0 181 69.75 31.9 27.8 17.7 1.0704 12.4 0

chapter case: You have been asked to prepare a report on the advantages and disadvantages of placing these function in a centralized corporate office, in the divisions, or at the hospital level.What are the problems and possible benefits of each arrangement? course hero

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ID 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 Salary Compa- Midpoint ratio 57.7 27.3 35.5 60.9 47 72.8 41.8 21.8 76.3 22.5 22.8 64.5 41.4 23.1 23.5 47.9 67 35.2 24.3 33.6 77.5 53.6 22.9 61.2 24.5 22.3 38.4 75.3 73.2 49.5 23.9 27.2 61.8 28.1 24.5 23 23.6 59.7 34.4 23.9 40.6

The following data were collected in the study relating hypertensive status measured at baseline to incident stroke over 5 years.The sample size is 1312.No participants had a history of stroke as measured at baseline.Compute the cumulative incidence of stroke in the study. 5 Years:Not Stroke 5 Years:Stroke Baseline:Not Hypertensive 943 52

Mall Time Interview Results Midweek, Day 66 78 66 32 35 34 88 149 86 145 146 38 95 80 106 42 95 77 98 71 122 125 85 97 33 End of worksheet Midweek, Evening 64 71 174 53 52 96 135 142 149 59 82 118 132 81 111 68 22 50 125 105 92 115 148 66 74 Weekend, Day 64 121 29 147 162 108 61 77 88 131 127 141 176 161 3 82 128 51 81 54 161 158 45 134 38

Continuous random variables and probability distributions \f\f
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When applying simulation to a business problem, which of the following is the most appropriate choice for the results cell? The total cost. The holding cost per unit. The demand. The selling price. All of the above.

Amco Convenience Store purchases 500 hammers a year for its inventory from its supplier, who offers pricing at quantity discounts. The quantities and pricing from this supplier are shown in the following table below. The cost for Amco to place an order is $60, and the cost to store a hammer in inventory for a year is 15% of the unit price. a. What

The data below gives the mean price (in cents) of a litre of regular gasoline at self-service filling stations at a sample of six urban centres in Canada in May 2011. Urban area Priccr'lin'o Ottawa 128 .3 Winnipeg 126.2 Regina 13 2.3 Edmonton 120.8 Vancouver 13 9 .5 Whitehorse 13 6.9 Provide answers to the following to two decimal places. Part (a)
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Microsoft Excel was used on a set of data involving the number of defective items found in a random sample of 46 cases of light bulbs produced during a morning shift at a plant. A manager wants to know if the mean number of defective bulbs per case is over 20 during the morning shift. She will make her decision using a test with a level of

Helpful tutorials for this question Linear Equation Algebra Review David was a bit confused about scatterplots, so Tasha measured the diameter and circumference of four different tires.Tasha used diameter as the x-variable, and circumference as the y-variable.The points fall closely on a line. Using the data value Tasha collected, the y-intercept

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What Z value corresponds to the lowest 25% of area under the normal curve? 2. What Z value correspond to the middle 80% of area under the normal curve? 3. What percentage of area is below a Z value of -2.58? 4. The mean of a population = 54.72, and the mean of a sample from the population = 54.92.Assuming the difference between the two values is

Jim owns an ice cream stand. Weekly sales and prices depend on the weather. If it is a normal week Jim sells between 300 and 500 ice cream cones at an average selling price of $2.50 each. If it is a hot week he sells between 350 and 675 ice cream cones at an average selling price of $2.75 each. Regardless of the weather conditions the cost per

a) What are some of the distinguishing properties of a normal Distribution? Discuss b) The sampling distribution of the sample means is the curve that describes how the sample means are distributed. True or False Explain c) The mean of sample means is the same as thepopualtionfor a given sample of size n. TrueFalseExplain How do you find the area

In order to see if my secret molecule works, a random sample of ten colleagues who had the coffee before the Dean's meeting was selected. I have observed the time, in hours, for those 10 colleagues to stay awake at the extremely long-winded Dean's meeting as soon as it started. Oh, yes, one fell asleep even before the meeting started! 1.9 0.8 1.1

In a drug test for adverse reactions it was found that 734 men treated with Xanax, 16% experienced headaches. Among 725 men in the placebo group, 4% experienced headaches. a) Using a 0.01 significance level, is there sufficient evidence to support the claim that among those men who take Xanax,headaches occur at a rate that is greater than the rate

STATISTICS FOR BUSINESS - MNS 601 Special Project (Example #1) Name: Student A Date: ____________ Part A: Description of Business Context Write a brief summary of the business context (e.g., manufacturing, marketing, finance, etc.) including the name of the company or organization. The economic crisis affected many industries, particularly the

14-1: make a force field analysis (FFA) on the driving and restraining forces that influence your ability to do well in a specific academic course.One driving force may be "your desire to learn".One restraining force may be "your need to devote time to other work

I need help with these questions Take a Test - Amira Douzi //www.mathxl.com/Student/PlayerTest.aspx?testid=202472989¢erwin=yes Math 1324 Summer 2019 Amira Douzi & | 7/26/19 4:06 Quiz: Quiz_7_(6.1,6.2) Time Remaining: 01:59:48 Submit This Question: 6 pts 1 of 15 (0 complete) D This Quiz: 100 pts pos yL Determine whether the given ordered pair
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Among the four northwestern states, Washington has 51% of the total population, Oregon has 30%, Idaho has 11%, and Montana has 8%. A market researcher selects a sample of 1000 subjects, with 450 in Washington, 340 in Oregon, 150 in Idaho, and 60 in Montana. At the 0.05 significance level, test the claim that the sample of 1000 subjects has a

construct the confidence interval for the population mean. c=0.90, x = 7.6, standard deviation =0.4, n=51

A shipment of steel bars will be accepted if the mean breaking strength of a random sample of 12 steel bars is greater than 250 pounds per square inch. In the past, the breaking strength of such bars has had a mean of 238 and a variance of 401. (Give your answers correct to four decimal places.) (a) Assuming that the breaking strengths are

The computer that controls a bank automatic teller machine crashes a mean of 0.4 times per a day. what is the probability that, in any seven-day week, the computer will crash more than 3 times? round answer to four decimal places

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