2. What conditions must be met for the hypothesis test to be valid?|A. There must be at least 10 'success' and 10 'failure' observations.B. Population data must be nearly normal or the sample size must be at least 30.C. Each observation must be independent of all other observations.O D. There must be an expected count of at least 5 for each level of the categorical variable.)E. There must be at leastlevels of the categorical variable.3. Under the null hypothesis, what is the expected count for the movie The Avengers?expected value =4. When calculating the test statistic, what is the contribution from the movie The Avengers?contribution =5. What is the degrees of freedom for the test statistic?df = Marvel movies - Kylie is a huge fan of Marvel movies. She finds an online poll that asks, "What is the best movie of the Marvel Cinematic Universe?"and saves the data. For a class project she wants to determine if the distribution of her classmates' favorite Marvel movies is different from the onepublished in the online poll. She surveys the 215 students in her statistics class. The table below contains the percentages reported by the online polland the observed counts from her classmates.Report all calculated answers to 4 decimal places.PollObservedMoviePercentageCountCaptain America: The Winter Soldier18.1%34Guardians of the Galaxy14%34The Avengers13.9%32Captain America: Civil War11.4%24Iron Man7.5%20Doctor Strange3.7%10Other Marvel movie31.4%61

It is given that Sample size n = 215 Number of categories k = 7 To test that whether that…

Answered: 2. What conditions must be met for the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The prices of a sample of books at University A were obtained by two statistics students. Then the cost of books for the same subjects (at the same level) were obtained for University B. Assume that the distribution of differences is Normal enough to proceed, and assume that the sampling was random. a. First find both sample means and compare them. b. Test the hypothesis that the population means are different, using a significance level of 0.05. E Click the icon to view the table of prices. a. Find the sample mean for University A. $ 64.60 (Round to the nearest cent as needed.) Find the sample mean for University B. $ 70.40 (Round to the nearest cent as needed.) Compare the sample means. The sample mean is larger at University B. b. Determine the hypotheses for this test. Let Hdifference be the mean of differences between the paired observations. Choose the correct answer below. O A. Ho: Hdifference = 0 O B. Ho: Hdifference >0 Ha: Hdifference 0 Ha: Hdifference +0 Find the test…
5. Given 3 samples: n = 20,x, =15,s, =3; n, =20,x, =12, s, =4; nz = 20, x, =18, s, = 5. Use ANOVA to test if the Population Means are the same or not for a =.05?
B. Find the confidence intervals for the population mean from the given information. 3. X = 28, 4. X = 50, 5. X = 75, 6..X = 15.3, n=60, = 10, n = 16, n = 58, S = = 4 Confidence Level: 90% %3D s = 4.2 Confidence Level: 95% 0 = 10 Confidence Level: 99% o = 16 Confidence Level: 95% 11.
10. Use a .01 significance level to test the claim The ABC Diet contributes to weight loss. Five people were randomly selected from a normally distribute population with the following weights. Show work. Subject: A B C D E Before 154 164 171 145 157 After 151 154 166 148 151
Go to artofstat.com, click on WebApps and open the Sampling Distribution for the Sample Mean for continuous variables (NOT discrete). Under Population Distribution select Skewed. Note the mean and standard deviation given on the graph. Which of the following statements is true? a) The mean is a parameter, but the standard deviation is an estimator. b) Both the mean and standard deviation are parameters. c) The standard deviation is a parameter, but the mean is an estimator. d) Both the mean and standard deviation are estimators.
Which of the following is correct? Select one: a. Two-sample procedures should be used with matched pairs designs. b. If some of the matched pairs are missing some data, use a two-sample procedure as it does not require equal sample size in each group. c. The sample sizes in each group need to be equal to use two-sample procedures. d. Two-sample procedures can be used with random samples from each group and for experiments where a single population is randomized to the two groups. Clear my choice
1. Which is more informative: confidence intervals or significance tests? A.Significance tests, because they use a P-value. B. Significance tests, because they compare two hypotheses. C. Confidence intervals, because they estimate the population parameter. D. Confidence intervals, because they use sample information.
Select the most appropriate response. Which of the following statements explains the following graphic, which includes a picture of a 21 distribution along with three sampling distributions of the mean with different sample sizes In=4 ORIGINAL DISTRIBUTION a) Averages calculated from larger samples will be less variable. b) Averages calculated from larger samples will be more variable. c) Averages calculated from larger samples will be larger. d) Averages calculated from larger samples will be closer to zero
13. If the mean of a set of data is 30, and 36 has a 2-score of 1.5, then the standard deviation must be: 4 B. 5 C. 6 D. 7 E. 8 F. None of the above 14. Which of the following random variables is not discrete? Number of cars in a parking lot Roll of a fair six-sided die C. Number of books on a shelf D. Number of goals scored in a soccer match E. Height of individuals in a population F. Number of students in a classroom Fin
A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 307 people over the age of 55, 68 dream in black and white, and among 313 people under the age of 25, 12 dream in black and white. Use a 0.05 significance level to test the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. Complete parts (a) through (c) below.
Which of the following will decrease the confidence interval width for the population mean? A) Increase the confidence level and decrease the sample size. B) Increase the confidence level and increase the sample size. C) Decrease the confidence level and increase the sample size. D) Decrease the confidence level and decrease the sample size.
a. Median b. Mode c. Average d. Interquartile range 4.42. The random selection of a sample: 4.41. Which of the following is a measure of 4.47. A recent survey of 347 people that purchased dispersion? laptop computer found that 6 of the laptops were defective. Based on this survey, what is the probability of getting a defective laptop computer? a. Theoretically means that each item has an equal chance to be selected b. Ensures that the sample average will equal the population average c. Means that a table of random numbers was used to dictate the selection d. Is an almost meaningless theoretical requirement 4.43. Which of the following is a discrete probability distribution? a. Normal b. Weibull c. Binomial d. Lognormal 4.44. What is the general use of an R chart? a. To determine if the process is in control b. To determine if the process mean is in control c. To determine if the process variation is in control d. To determine the variance of the process 4.45. The instantaneous rate of…

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