S
  1. study help
  2. subject categories
  3. sciences
  4. mathematics
  5. february 2022
  6. 06

Mathematics Questions and Answers February 06, 2022

Expert-verified solutions to help you succeed

Answer these Questions A pulp and paper company is evaluating whether it should retain the current bleaching process that uses chlorine dioxide or replace it with a proprie- tary "oxypure" process. The relevant information for each process is shown, Use an interest rate of 13% per year to perform the replacement study Current Process Oxypure
image text in transcribedimage text in transcribedimage text in transcribed

Information - researcher wishes to estimate, with 90% confidence, the population proportion of adults who say chocolate is their favorite ice cream flavor. Her estimate will be accurate within 5% of the population proportion. No preliminary estimate is available. Find the minimum sample size needed. ? also Find the minimum sample sizeneeded, using

(a (b (c (d (e [ == ) ) (f) (g (h ) (i) ) (k S DNA sequences from two different regions of two closely linked human fetal globin genes were studied by Weir (1996). The counts of nucleotides in 3'- flanking regions of the genes and Introns are reported in the table. Region | length [A] C [ G | T | 3'-flanking 1000 029| 015 0.26 | 030 T The question
image text in transcribed

Can you report the F value including degrees of freedom (dfregression, dfresidual), the f statistic and its p-value Paragraph styles Model Summary Adjusted R Std. Error of Durbin- Model R R Square Square the Estimate Watson 488 238 227 12.215 915 a. Predictors: (Constant), anxiety b. Dependent Variable: exam ANOVA Sum of Model Squares df Mean
image text in transcribed

In reporting the results of a statistical test in a research article, which would not be reported? Question 20 options: A) The probability (p) value B) The computed value of the test statistic C) The theoretical value of the test statistic D) Degrees of freedom

If variables are normally distributed, what percentage of individual responses will have z scores between 2 and -2? Group of answer choices 99% 68% 0% 95%

how do i solve this Find the future value of and the compound interest on $600 invested at 5.6% compounded quarterly for parts (a) through (c). (a) 4.75 years (b) 9 years (c) 12.75 years (a) The accumulated value is $|:|. (Round the nal answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.) What is
image text in transcribedimage text in transcribedimage text in transcribed

If i am in the positive skew am i only making ends meet or am i making a profit

Which of the following statements is true? Question 5 options: It is impossible for critical values to be negative. It is possible to make a confidence interval with 100% confidence. The critical value of a confidence interval for a population mean is a normal distributed Z value. If we switch the point estimate for the confidence interval of

You plan to compare systolic blood pressure between two ethnic groups, and there is evidence from the literature that weight may also influence systolic blood pressure, but this is not the variable of interest. What statistical test will you use to control for weight? Multivariate ANOVA Analysis of Covariance Factorial ANOVA Repeated Measures ANOVA

Use the chart and information below to answer the following fivepart question. The chart below shows the followup experience of a cohort followed from time zero for ten years. Note that the first ten persons in the chart are exposed and the second ten persons in the chart are unexposed. Assume that all events occur at the end of a year. For

In a particular year, the mean score on the ACT test was20.9 and the standard deviation was5.8. The mean score on the SAT mathematics test was496 and the standard deviation was110. The distributions of both scores were approximately bell-shaped. Round the answers to at least two decimal places. Jose's ACT score had a z score of 0.83. what was his

2. Suppose the weight (in lbs) of an adult male sheep in a pasture is distributed as N(100, 225) a) Find the probability that the weight of a sheep is over 120 pounds. b)What value of weight separates the heaviest 10% of all the sheep in the pasture from the other 90%? Use the Normal Table
image text in transcribed

A tire manufacturer periodically tests its tires for tread wear under simulated road conditions. To study and control its manufacturing processes, the company uses -charts. The data has been collected below. Perform the required analysis to answer the questions below. X-bar DATA 1 2 3 4 5 Range Average LCLx-bar Center UCLx-bar 1 22 45 47 29 30 2

Monte Carlo" methods are often used to test the effect of violating assumptions of statistical tests. have been used primarily to create new statistical methods, including the t test for independent means. were developed in the casino industry. were invented by "Student" (Gossett)

hello i need help with this practice question: my book says: A researcher wanted to test a how well people can remember words wit diffrent strategies. A researcher asked a group of people to learn a list of silly words he made. first he asked them to look at the words and count the number of vowels in them one time. after that he asked tha group

One year, the mean age of an inmate on death row was 40.4 years. A sociologist wondered whether the mean age of a death-row inmate has changed since then. She randomly selects 32 death-row inmates and finds that their mean age is 38.7, with a standard deviation of 9.3. Construct a 95% confidence interval about the mean age. What does the interval

Find the volume of the solid generated by revolving the region enclosed by xequalsStartRoot 15 EndRootysquared, xequals0, yequalsminus4, and yequals4 about the y-axis

(3 points) In the list of probability experiments described below, circle the letter next to ALL that are binomial. A. Count the number of candies in a fun-sized bag of M&Ms B. Ask 10 people whether or not they have eve been to Paris C. Ask 10 people their weight D. Flip a coin until you get heads E. Ask 10 registered voters their political party
image text in transcribed

2XO. 1x0.05 =0.2 -0.3 =0.4 0.00 3 5 X 2 x0.05 = D, 1 6 7 8 What proportion of values of X fall between 1 and 6? *A) 0.550 (B) 0.575 (C) 0.600 (D) 0.625 (E) 0.6 33. Which of the following normally distributed variables has the density curve highest peak?/ ( A) X1 ~ N ( 43, 7 ) B. (BB) X2 ~ N(38, 5) (C) X3 ~ N(14,6) (D) XA ~ N(27, 8) 38 43 (E) All
image text in transcribed

The sample standard deviation of seven (7) diameters (mm) of the inside diameter of nuts are 7, 5, 10, 4, 5, 8, and 5 is 2.14 mm. True False

A set of attributes which belong together is known as a Group of answer choices row. column. record

3 16 sin (x) dx using Part 1 of the Fundamental Theorem of Calculus. 577 3 16 sin (x) di = _
image text in transcribed

Which of the following assumptions of the one-way independent ANOVA is the most important, in other words, should never be violated? a. b. Variability of residuals Homogeneity of population variances Independence of observations d. Normality of the population distributions

Show why 3 always divides evenly into the sum of any three consecutive whole numbers. Identify the strat- egy you chose and how your result may have been different had we chosen to use natural numbers instead of whole numbers

15. When national income decreases, expenditures on imports tend to decrease. Which of the following best describes this relationship? Select one: a. No relationship b. An inverse relationship c. A negative relationship d. A positive relationship

Please see question below, thank you. Researchers investigated the effects of being distracted by a game on how much people eat. The 22 patients in the treatment group who ate their lunch while playing solitaire were asked to do a serial-order recall of the food lunch items they ate. The average number of items recalled by the patients in this
image text in transcribedimage text in transcribed

Exam 2 MAT 1201 Summer 2014 (16) 1. I roll two dice one time and look at the result, let the events be defined as follows Event A = die 1 is a 4 event B = sum of the dice is 9 event C = die 2 is even a) Are events A and B independent, dependent or mutually exclusive? Why or why not? b) Are events A and C independent, dependent or mutually

What statistical test could be used to compare the mean ages in five independent populations? Group of answer choices Chi-square test Kruskal-Wallis H test Fisher's exact test Independent samples t-test

Student federal loans: A Brookings Institution report, "Are College Students Borrowing Blindly?", suggests that undergraduate students may be confused about their debt. For example, among all first-year undergraduate students with federal loans, 14 percent said they didn't have any student debt at all. Let's assume this is true for the population

2. Rental car gasoline prices per gallon were sampled at eight major airports. Data for Hertz and national car rental companies follow. Use? =0.05to test the hypothesis of no difference between the population mean prices per gallon for the two companies l Chapter 7 so 2. Rental car gasoline prices per gallon were sampled at eight major airports.
image text in transcribedimage text in transcribed

see chart for matching questions Problem 2 (3 pts): Three of the function graphs below are the graphs of probability density functions (pdf). The remaining graphs are of their corresponding cumulative distribution functions (CDF). Match them! A B C D E F To answer fill in the table: pof matching CDF
image text in transcribed

Review this week's Learning Resources, focusing in particular on the Descriptive Statistics section with resources on defining and calculating averages, mean, median, and mode. Call at least 10 convenience stores and/or grocery stores in your area and ask for the price of a pack of cigarettes. It can be for any brand, but make sure that the prices

Chapter 07.03 Exercise Question 04 7.3.4 In a study of parents' perceptions of their children's size, researchers Kaufman et al. (Current Biology, 2013) asked parents to estimate their youngest child's height. The researchers hypothesized that parents tend to underestimate their youngest child's size because the youngest child is the baby of the

The use of statistical data can be a very effective tool in a persuasive speech. Group of answer choices True False

1.Determine the semi-interquartile range for the following set of scores. 90, 120, 95, 95, 110, 105, 115, 115, 100, 105, 100, 105

can you help me to solve this -9 -8 -7 -6 -5 -4 -3 -2 -1. 2 5 6 7 8 Write an equation for the ellipse graphed in standard form
image text in transcribed

A ship's mast is sighted just over the horizon at 4 nautical miles. How far is this in kilometers? (Round to one decimal place and do not include units in your answer.) Note: There are 1.609 kilometers in a mile, 6 , 076 feet in a nautical mile and 5 , 280 feet in a mile

Dataset Selection: Choose a dataset that allows for one sample, two paired samples, and two independent sample tests. Briefly explain why you have chosen this dataset. Hypothesis Formulation: Formulate hypotheses appropriate for one sample, two paired samples, and two independent sample tests. Describe the hypotheses for each test clearly.

The mean of virtue is best understood in the way 6 is the mean of 10 and 2

An insurance company has determined that the cost of a certain medical procedure varies according to a normal distribution with a mean of 800 and standard deviation of 40. if a new insurance claims come in for this particular medical procedure, what is the probability the will be greater than 900

17. A shopkeeper determines that his revenue during the next year should be approximately normally distributed with a mean of $50,000 and a standard deviation of $10,000. What is the probability that his revenue will exceed $60,000? Select one: a. 0.0001 b. 0.9550 c. 0.1587 d. 0.8555

The idea of insurance is that we all face risks that are unlikely but carry high cost. Think of a fire destroying your home. So we form a group to share the risk: we all pay a small amount, and the insurance policy pays a large amount to those few of us whose homes burn down. An insurance company looks at the records for millions of homeowners and

The Data Data collected on n = 109 countries in 1995. Data collected on k = 25 variables. The variables 1. Population Size (in 1000s) 2. Density = Number of people/Sq kilometer 3. Urban = percentage of population living in cities 4. Religion 5. lifeexpf = Average female life expectancy 6. lifeexpm = Average male life expectancy 7. literacy = % of

To examine changes in teaching self-efficacy, 10 teachers were measured on their self-efficacy toward teaching at the beginning of their teaching career and at the end of their first and third years of teaching. The teaching self-efficacy scale ranged from 0 to 100 with higher scores reflecting greater teaching self-efficacy. The data are shown

What is listed on the vertical axis of a histogram? Question 20 options: a) Mid-point of each interval b) Cumulative percentage c) Percentage d) Variable of interest e) Upper limit of each interval

Two random samples are taken, one from among UVA students and the other from among UNC students. Both groups are asked if academics are their top priority. A summary of the sample sizes and proportions of each group answering ``yes'' are given below: UVA (Pop. 1):UNC (Pop. 2):n1=90, n2=95, p1=0.793 p2=0.637 Find a 96.1% confidence interval for the

In the one-sample case, you are comparing the statistic from a sample to a known population parameter to determine whether the sample is from the general population. In the two-sample case, you are comparing the statistics from two different samples to determine whether the samples are from the same or different populations. There are important

Consider your Statistics 213 lecture section. There are 120 students registered. Of these 120 students, 56 are Haskayne School of Business students (the remaining students belong to some other faculty). Moreover, 69 students are classified as 1st-Year students and 20 are 1st-Year students and who are not Haskayne students. You are to randomly

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. Suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. At a 5% significance level, can you conclude that the proportion of all shoppers who currently

Were sugar cravings significantly predictive of weight loss at =.05? yes or no 2.List the unstandardized beta. 3.Write the regression equation generated by SPSS, with the unstandardized beta and the y-intercept values obtained from the output. 4.Using Lisa's sugar craving value, use the new regression equation to predict her weight loss.Write

For the scores below, using the preferred class interval size of 15, determine the most appropriate class interval size for each range of scores. a. 1 through 45 b. 72 through 136 c. 43 through 237 d. 0.12 through 0.38 Determine approximately the number of resulting classes if: a. A class interval of 5 is used for a range from 1 through 55. b. A

Answer each section Part 1: Using the preliminary data collected in the Topic 2 assignment, complete two hypothesis tests relevant to the specific requirements of your scenario. To ensure tests are not duplicated, collaborate with the other members of your group to identify specifically which data each person in the group will be utilizing in the
image text in transcribedimage text in transcribedimage text in transcribed

Pls help Question 1 (25 points) Let f(x) = -(x - 2)2 + 4 and g(x) = Vx + 3. Use your calculator to complete the following. 1. Sketch a picture of the graph 3 2. Find the values such that f(x) = g(x), round your answer to 3 decimals if needed. 3. Find the intervals of increasing and decreasing between [0,4] for both functions. 4. Find the intervals
image text in transcribed

Should a standard score should be classified as a random procedure or a nonrandom procedure

having difficulties with this proof, please help. all required info given. \f
image text in transcribed

What is or define an implicit function thoroughly and give an example of such function in details?

Answer these Keep or Replace the Kiln Case PE In Example 1 1.8, the in-place kiln and replacement killm (GH) were evaluated using a fixed study pe- riod of & years. This is a significantly shortened period compared to the expected 12-year life of the challenger. Use the best estimates available throughout this case to determine the impact on the
image text in transcribedimage text in transcribedimage text in transcribed

I HAVE 30 min please help 2 - Consider a renewal process Wit) whose nter ornval follows uniform distribution U(2 , 3 ) Compute the renewal function m( + )
image text in transcribed

In the article "Tails over Heads" in the Washington post (Oct. 13, 1196), journalist William Casey describes one of his hobbies-- keeping track of every coin he finds on the street! From January 1, 1985 until this article was written, Casey found 11,902 coins. As each coin is found, Casey records the time, date, location, value, mint location, and

Fourteen different video games showing violence were observed. The duration times of violence (in seconds) were recorded. When using this sample for a t test of the claim that the population mean is greater than 84 sec, what does dfdenote, and what is itsvalue?

Forecasting earnings is an example of which type of predictive analytics? Classification, regression, time series analysis, variance analysis

Consider the region bounded by the curvex=y^2 and the linex=4 . Which one of the following integrals gives the area of this region?

Which of the following statements are true? Question 19 options: Probabilities must be negative. Probabilities must be nonnegative. Probabilities can be any positive value. Probabilities can either be positive or negative

4.Historically about 72% of American Indian youth graduate from high school.A new after school program claims to increase the proportion who graduate.If 50 randomly selected youth participated in the program and 39 of them graduated, is this sufficient evidence that over 72% of youth participating in the program graduate?Using a 0.05 level of

During the 2008 presidential election, newspapers reported that Obama received 40% of the white male vote. If this is true, what is the probability that a random sample of 1,000 white male voters had less than 35% voting for Obama? Group of answer choices About 0% About 5% About 8% We cannot determine the probability because a normal model is not

Generalization is not possible in qualitative research studies. True or False

Two processes for manufacturing large roller bearings are under study. In both cases, the diameters (in centimeters) are being examined. A random sample of 26 roller bearings from the old manufacturing process showed the sample variance of diameters to be s2 = 0.214. Another random sample of 29 roller bearings from the new manufacturing process

How do college professors spend their time? The National Education Association Almanac of Higher Education gives the following average distribution of professional time allocation: teaching, 46% ; research, 15% ; professional growth, 8% ; community service, 11% ; service to the college, 11% ; and consulting outside the college, 9% . Make a pie

can you assist Quntion 6 Use the Chi-Square distribution table (Table A-4) to find the critical values Chis, and Chi's that correspond to a confidence level of Question 8 Not yet answered (1-alpha)=99% and sample size, n=41. Not yet Consider the clinical test of the drug Zinc. In the past, it was known that the drug causes dizziness as a side
image text in transcribed

Si se desea estimar la proporcin de participantes en las siguientes votaciones presidenciales, el mximo error que se desea cometer es del 2% y que por datos basados en historia se sabe que el 55% de la poblacin vota, de qu tamao deber de ser la muestra de la proporcin de la poblacinal 95% de confianza?

9. When John and Kathy moved in together 10 months ago they both agreed to share the responsibility for the household chores equally. Kathy has been keeping a daily record of John's efforts. 40% of the time John prepares dinner and 35% of the time he does the dishes. On those days that John prepares dinner, he does the dishes 30% of the time. What

In the bivariate regression, based on the t test result for the predictor variable and (Beta)2 as the effect size estimate, we can conclude that ______. Group of answer choices The predictor does not significantly predict Acceleration, with a small effect size. The predictor can significantly predict Acceleration, with a medium to large effect

71 65 61 44 48 45 55 61 52 62 63 64 46 50 63 67 44 50 50 51 66 68 55 62 52 54 61 66 38 51 55 57 45 55 60 67 50 41 82 59 a-1. Calculate the mean and the median for Highway 1. (Round final answers to 1 decimal place.)

What problems can confounding variables cause? Select all that apply. A. They can make a study seem unnecessarily complex. B. They can cause the study to favor certain results unexpectedly. C. They can prevent the sample from being representative of the population. D. They can cause incorrect conclusions to be drawn from the study

Which measure of central tendency is calculated as the arithmetic average of a distribution? Question 29 options: a) Mode b) Median c) Range d) Highest e) Mean

(3 pts) Two planes 11'1 and 172 are orthogonal and intersect in the line L: (:17, y, z) = (4, 2, 3) + t (5, 5, 3). If 71] contains the point Q (2, 3, 1), find the equations of these planes. Equation of 11]: Equation of 772
image text in transcribed

29% of college students say they use credit cards because of the rewards program. You randomly select 10 college students and ask each to name the reason he or she uses credit cards. Find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, and (b0 more than two. and
image text in transcribed

12.14.A random sample of 100 men and 100 women were asked whether they would be willing to work as unpaid volunteers. The results indicate that 54% of the men and 64% of the women responded YES to this question, while 46% of the men and 36% of the women responded NO to the question. The chi square test was used to determine whether the men and

is it true a. if there was a RELATIONSHIP between female gender and BMI I would use Pearson correlation, because BMI is Ratio measurement with wide range of values and Gender can be inverted numeric variable using reference cell coding. When you treat one gender as base line category and assign value 0" and assign the other gender "1". After these

If the = 0.01, do you reject the null hypothesis? If the = 0.05, do you reject the null hypothesis? Write out the results using APA's standards for reporting statistical results, including effect size. results are t-test 0.707 DF 5423 P 0.480 Cohens d0.024

A distribution with a mean of = 73 and a standard deviation of = 8 is being transformed into a standardized distribution of = 100 and = 16. Find the new, standardized score for each of the following values from the original population (plot each point on a graph): a. X = 80 b. X = 70 c. X = 65 d. X = 87

Exercise 4.5 Calculus \fQuestion 1 0/1 pt 5 100 99 O Details dz Find given: dt z = me'y, x = t', y= - 1+ 2t dz dt Your answer should only involve the variable t. Let z(x, y) = - 3x2 - 6y where x = - 2s + 4tay = - s + 2t. Oz Ox dy Ox ay Calculate Et by first finding Et and using the chain rule. at as ' as' at at = atQuestion 10 0/1 pt 5 100 99 0
image text in transcribedimage text in transcribedimage text in transcribed

The human resources department of a consulting firm gives a standard creativity test to a randomly selected group of new hires every year. This year,100 new hires took the test and scored a mean of112.2 points with a standard deviation of12.9. Last year,55 new hires took the test and scored a mean of117.8 points with a standard deviation of14.8.

Answer these Questions A piece of equipment has a first end of $150,000, a macsumana usefid life of 7 years, and a market (sal- vage) value described by the relation S = 120,000 - 2010004, where & is the number of years since it was purchased. The salvage value cannot go below zero. The AOC series is estimated using AOC = 601000 + 10,000k The
image text in transcribedimage text in transcribedimage text in transcribed

In order to make sure Sam gets to his final exam on time he sets 3 alarm clocks that work independently of each other. Assume the probability of any one of the alarms working is equal to .98. What is the probability that Sam is late to his final exam

Match the following type of lever with its appropriate example: Second-class lever. ANSWER Unselected None of the choices is correct. Unselected Standing on tip-toe Unselected Lifting your head off your chest Unselected Flexing the forearm with the biceps brachii

Question 1 Has the proportion of first year statistics students at Swinburne who are studying for a Business Degree increased? In 2003 45% of students studying first year statistics (Foundations of Statistics) at Swinburne were enrolled in a Business Degree. It has been suggested that this percentage has increased. We will use the information in
image text in transcribed

Unit 4 Session 5: Administer either the Basic Spelling Screener (K-2) or Advanced Spelling Screener (3+) to your class. Score and analyze each student's results, and add the results to each student's folder.Use the Class Composite Sheets to record whole-class results, and consider your next instructional steps. Upload your thoughts from your

SlowRun Express runs between Bangalore and Mumbai, For the up as well as the down journey, the train leaves the starting station at 10:00 PM everyday and reaches the destination at 11:30 PM after three days.Mr. Haani once travelled by SlowRun Express from Mumbai to Bangalore. How many SlowRun Express did he cross during his journey?

8. age * Gender * Dose Dependent Variable: recall 95% Confidence Interval age Gender Doge Mean Std. Error Lower Bound Upper Bound young female placebo 7.367 .180 7.009 7.724 medium 7.200 180 6.842 7.558 large 7.367 . 180 7.009 7.724 extralange. 7.350 . 180 6.992 7.708 male placebo 7.667 .180 7.309 8.024 medium 7.883 180 7.526 8.241 large 8.983 180
image text in transcribed

Use Data7 file. At the 1% level, test to determine if the average quarterly revenue for Nordstorm is different from 11,000. Make sure to state the hypotheses, p-value, your decision and how you made the decision (the criteria), and your conclusion. Hypothesis: H0: = 11,000 Ha: < 11,000 P-Value? Criteria and Conclusion? Date Nordstorm Revenue GDP

Suppose the coffee industry claimed that the average adult drinks 1.8 cups of coffee per day. To test thisclaim, a random sample of 50 adults wasselected, and their average coffee consumption was found to be 1.85 cups per day. Assume the standard deviation of daily coffee consumption per day is 0.4 cups. Using = 0.10 , complete parts a and b

Homework 6 " Statistics for Clinical Research DRA.8S07 Respond to each of the following questions in your own words. Be sure to bring a hard copy to : your next class. . = % Chapter 8 Review Exercises Complete exercises 6 and 8. 6. BMI for Miks America A claimed trend of thinner Miss Ameriea winners has generated charges that the contest
image text in transcribed

According to national data, about10%of American college students earn a graduate degree. Using this estimate, what is the probability that exactly15undergraduates in a random sample of 200 students will earn a college degree? Hint: Use the normal approximation to the binomial distribution, where p =0.1 and q =0.9. (Round your answer to four

If two fair dice are rolled, what is the probability of not rolling a double? (a double is the same number on both dice)

The banks have also advised piedmont of the maximum amount of money they are willing to lend at this time. Piedmont would also like to purchase as many buildings as possible while paying the lowest psosible amount in total interest

Problem 3. Suppose U and V are two independent, identically distributed uniform [0, 1] random variables. (a) Calculate the joint density of X = max {U, V} and Y = min U, V. (b) Compute the covariance of X and Y. (c) Find E[Y X] and E[X|Y]. (d) Determine the linear predictor of Y in terms of X, Y = aX + b, that has minimal mean squared error, i.e.
image text in transcribed

How about criminal profiling is statistically low in accuracy

Relationship Longevity Homosexual Couples Heterosexual Couples X1 = 15.2 years X2 = 16.7 years s1 = 9 years s2 = 12 years N1 = 31 N2 = 30 Use the t distribution table that follows to find the critical t-score, the value for a t-score that separates the tail from the main body of the distribution, forming the critical region. To use the table, you

Showing 200 - 300 of 1503
  • 3 / 16