According to a Pew Research Center study, in May 2011, 33% of all American adults had asmart phone (one which the user can use to read email and surf the Internet). Acommunications professor at a university believes this percentage is higher among communitycollege students. She selects 323 community college students at random and finds that 134 ofthem have a smart phone. In testing the hypotheses:Ho: p= 0.33 versusHa: p > 0.33Do the hypothesis test. Use a level of significance of a = 0.05;Use the unrounded values in Excel to find the answers for #3 and #4.1. This is an example of ahypothesis test.2. Find the standard error.3. Find the z value. --

Given,To find the type of test, standard error, and calculate the z value.

Answered: 1. This is an example of a 2. Find 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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9
Q. 20 When do you call a test uniformly most powerful?
28
18 A sample of n=8 scores has a mean of M=12. One new score is added to the sample and the new mean is found to be M=13. What is the value of the new score?
Suppose there is a claim that a certain population has a mean, u, that is equal to 6. You want to test this claim. To do so, you collect a large random sample from the population and perform a hypothesis test at the 0.10 level of significance. To start this test, you write the null hypothesis, H, and the alternative hypothesis, H, as follows. 国 Hoi u=6 Hi u#6 An Suppose you also know the following information. The value of the test statistic based on the sample is 1.845 (rounded to 3 decimal places). The p-value is 0.065 (rounded to 3 decimal places). (a) Complete the steps below for this hypothesis test. Normal Distribution Step 1: Select one-tailed or two-tailed. o One-tailed o Two-tailed 0.3 Step 2: Enter the test statistic. (Round to 3 decimal places.) Step 3: Shade the area represented by the p- value. (b) Based on your answer to part (a), which statement below is true? o Since the p-value is less than (or equal to) the level of significance, the null hypothesis is rejected. Since…
K Census data for a certain county show that 17% of the adult residents are Hispanic. Suppose 74 people are called for jury duty and only 10 of them are Hispanic. Does this apparent underrepresentation of Hispanics call into question the fairness of the jury selection system? Explain.. Write appropriate hypotheses. Ho: p= 17% HA: P < 17% The test statistic is z = - .80 (Round to two decimal places as needed.) The P-value is. (Round to three decimal places as needed.) C
You are conducting a hypothesis test where the null hypothesis is that mu is greater than or equal to 98.6. Your test will be at the 0.05 significance level. You take a sample of 50 people (a large sample), and find that the sample average is 101, and the standard deviation is 2. What is/are the critical values for this test? Group of answer choices a 1.64 b -1.64 c -1.64 and 1.64 d -1.96
Suppase there is a claim that a certaln population has a mean, u, that is less than 9. You want to test this clalm. To do so, you collect a large random sample from the population and perform a hypothesis test at the 0.05 level of significance. To start this test, you write the null hypothesis, Hy and the alternative hypothesis, H, as follows. Ho p29 Suppose you also know the following information. The value of the test statistic based on the sample is -1.995 (rounded to 3 decimal places). The p-value is 0.023 (rounded to 3 dedmal places). (a) Complete the steps below for this hypothesis test. O One-tailed o Two-tailed Step 2: Enter the test statistic. (Round to 3 decimal places.) Step 3: Shade the area represented by the p- value. Step 4: Enter the p- value. (Round to 3 decimal places.) (b) Based on your answer to part (a), which statement below is true? Since the p-value is less than (or equal to) the level of significance, the null hypothesis is rejected. Since the p-value is less…
Show work or excel formulas pls
7:39 Done A myopenmath.com AA Lindsey and Andrea began arguing about who did better their tests, but they couldn't decide who did better given that they took different tests. Lindsey took a test in Social Studies and earned a 75.2, and Andrea took a test in Math and earned a 68.1. Use the fact that all the students' test grades in the Social Studies class had a mean of 73.7 and a standard deviation of 11.4, and all the students' test grades in Math had a mean of 60.4 and a standard deviation of 10.8 to answer the following questions. a) Calculate the z-score for Lindsey's test grade. = Z b) Calculate the z-score for Andrea's test grade. c) Which person did relatively better? Lindsey Andrea | They did equally well. Submit Question
Suppose there is a claim that a certain population has a mean, µ, that is different than 7. You want to test this claim. To do so, you collect a large random sample from the population and perform a hypothesis test at the 0.05 level of significance. To start this test, you write the null hypothesis H, and the alternative hypothesis H, as follows. Hoi u= 7 H: u =7 Suppose you also know the following information. The critical values are - 1.960 and 1.960 (rounded to 3 decimal places). The value of the test statistic is 2.477 (rounded to 3 decimal places). (a) Complete the steps below to show the rejection region(s) and the value of the test statistic for this test. Standard Normal Distribution Step 1: Select one-tailed or two-tailed. One-tailed 0.3 Two-tailed Step 2: Enter the critical value(s). (Round to 3 decimal places.) 0.2+ 0.1+ Step 3: Enter the test statistic. (Round to 3 decimal places.) 2 (b) Based on your answer to part (a), choose the correct statement. O The value of the test…
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1. This is an example of a 2. Find the standard error. 3. Find the z value. -- hypothesis test.