a.) List the null and alternative hypothesisb.) Find test statistic and degrees of freedom c.) Find the p-value and our conclusion at a 5% significance level Random samples of people ages 15-24 and 25-34 were asked about their preferredmethod of (remote) communication with friends. The respondents were asked toselect one of the methods from the following list: cell phone, instant message, e-mail,other. Below are the test results from R:Preferred Communication MethodInstantRowAgeCell PhoneMessageE-mailOtherTotal15-244840710025-3441301514100Column Total89702021200Pearson's Chi-squared testdata:tb1X-squared = 9.3125,

The total number of respondents is 200.

Answered: a.) List the null and alternative…

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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a) Answer true or false and explain your answer: If it is important not to reject a true null hypothesis, the hypothesis test should be performed at a small significance level. b) Explain the meaning of each term in your own words. a. rejection region b. non rejection region c. critical value(s) c) Explain exactly how a paired t-test can be formulated as a one-mean t-test. d) The following data, based on the results of the study, provide the decrease (negative values indicate increase) in (parathyroid hormone) PTH levels, in pg/mL, for those drinking the fortified juice and for those drinking the unfortified juice. Fortified Unfortified −7.7 , 11.2, 65.8, −45.6, −4.8, 26.4, 55.9, −15.5, 34.4, −5.0, −2.2, −20.1, −40.2, 73.5 65.1, 0.0, 40.0, −48.8, 15.0, 8.8, 13.5 −6.1 29.4, −20.5, −48.4, −28.7 At the 5% significance level, do the data provide sufficient evidence to conclude that drinking fortified orange juice reduces PTH level more than drinking…
A. Determine test statistic B. Determine critical value C. Reject H0 or Fail to reject H0
Conduct the hypothesis test and provide the test statistic, critical value and P-value, and state the conclusion. A package of 100 candies are distributed with the following color percentages: 15% red, 22% orange, 14% yellow, 8% brown, 25% blue, and 16% green. Use the given sample data to test the claim that the color distribution is as claimed. Use a 0.025 significance level.
The last part of the question, the options are: sufficient OR insufficient; support OR do not support. Thx!
Conduct the hypothesis test and provide the test statistic and the critical value, and state the conclusion. A person randomly selected 100 checks and recorded the cents portions of those checks. The table below lists those cents portions categorized according to the indicated values. Use a 0.05 significance level to test the claim that the four categories are equally likely. The person expected that many checks for whole dollar amounts would result in a disproportionately high frequency for the first category, but do the results support that expectation? cents portion of check 0-24. 25-49. 50-74. 75-99 number 32. 20. 27. 21
A survey was conducted to determine whether hours of sleep per night are independent of age. A sample of individuals was asked to indicate the number of hours of sleep per night with categorical options: fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more. Later in the survey, the individuals were asked to indicate their age with categorical options: age 39 or younger and age 40 or older. Sample data follow. Age Group Hours of Sleep 39 or younger 40 or older Fewer than 6 38 36 6 to 6.9 60 57 7 to 7.9 76 74 8 or more 66 93 (a) Conduct a test of independence to determine whether hours of sleep are independent of age. (b) What is your estimate of the percentages of individuals who sleep fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more per night?
a. set up appropriate null and alternative hypotheses of the test b. choose an appropriate test statistic and use the data to find the p-value
A. Suppose we want to test whether or not three means are equal. We want to perform this test with a 8% significance level.If we perform an ANOVA test, what is the probability of the test producing accurate results (avoiding a Type I error)? B. Suppose we, instead, run three separate hypothesis tests (t-tests), each with 8% significance level. Mean 1 = Mean 2Mean 1 = Mean 3Mean 2 = Mean 3What is the probability that all three tests would be accurate? C. Why is an ANOVA test more accurate than 3 different tests?
7 b. Identify the test statistic c. The P-value for this hypothesis test is
A researcher wants to know if mood is affected by music. She conducts a test on a sample of 4 randomly selected adults and measures mood rating before and after being exposed to classic rock music. Test the hypothesis that mood rating decreased after being exposed to classic rock music. The mood ratings for the four participants are provided. Assume that all conditions for testing have been met. Report the null and alternative hypothesis and p-value. At the 1% significance level, state the decision regarding the null hypothesis and the conclusion about the original claim. Round all values to the nearest thousandth. Click the icon to view the mood ratings. OA. Ho Hdifference =0, Ha Hdifference >0; p=0.373; Reject the null hypothesis; there is strong evidence to suggest that exposure to classic rock music decreased mood rating. B. Ho Hdifference =0, Ha Hdifference >0; p=0.373; Fail to reject the null hypothesis; there is not strong evidence to suggest that exposure to classic rock music…
Conduct the hypothesis test and provide the test statistic and the critical value, and state the conclusion. A person randomly selected 100 checks and recorded the cents portions of those checks. The table below lists those cents portions categorized according to the indicated values. Use a 0.05 significance level to test the claim that the four categories are equally likely. The person expected that many checks for whole dollar amounts would result in a disproportionately high frequency for the first category, but do the results support that expectation? Cents portion of check 0-24 25-49 50-74 75-99 Number 63 15 13 9 The test statistic is enter your response here. (Round to three decimal places as needed.)
Conduct the hypothesis test and provide the test statistic and the critical value, and state the conclusion. A person randomly selected 100 checks and recorded the cents portions of those checks. The table below lists those cents portions categorized according to the indicated values. Use a 0.05 significance level to test the claim that the four categories are equally likely. The person expected that many checks for whole dollar amounts would result in a disproportionately high frequency for the first category, but do the results support that expectation? Cents portion of check 0-24 25-49 50-74 75-99 Number 35 21 19 25

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a.) List the null and alternative hypothesis b.) Find test statistic and degrees of freedom c.) Find the p-value and our conclusion at a 5% significance level