OA. Ho: Px-Py = 0H₁: Px-Py ≤0Small-business telephone users were surveyed 6 months after access to carriers other than Carrier A became available for wide-area telephone service. Of a random sample of 280Carrier A users, 145 said they were attempting to learn more about their options, as did 152 of an independent random sample of 220 users of alternate carriers. Test, at the 5%significance level against a two-sided alternative, the null hypothesis that the two population proportions are the same.O D. Ho: Px-Py #0H₁: Px-Py = 0<Let Px be the proportion of Carrier A users who said they were attempting to learn more about their options and Py be the proportion of users of alternate carriers who said they wereattempting to learn more about their options. Determine the null and alternative hypotheses. Choose the correct answer below.Question 3 of 5not more extrememore extreme>O B.Ho: Px-Py = 0H₁: Px - Py#0The test statistic is Z = (Round to two decimal places as needed.)The critical value(s) is (are).(Round to two decimal places as needed. Use a comma to separate answers as needed.)Since the test statistic isthan the critical value(s),O E. Ho: Px - Py = 0H₁: Px - Py> 0reject HoHo. There isdo not reject Ho-insufficientOC. Ho: Px-Py = 0H₁: Px-Py <0▾ evidence to conclude that there is a difference between the twosufficientOF. Ho: Px-Py = 0H₁: Px-Py 20

n1=280 x1= 145n2= 220x2= 152p^1=x1n1=145280=0.5179 Sample proportion of sample…

Answered: all-business telephone users were…

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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According to a Pew Research Center study, in May 2011, 33% of all American adults had a smart phone (one which the user can use to read email and surf the Internet). A communications professor at a university believes this percentage is higher among community college students. She selects 320 community college students at random and finds that 135 of them have a smart phone. In testing the hypotheses: Ho: p = 0.33 versus Ha: p > 0.33 Do 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 a hypothesis test. 2. Find the standard error. 3. Find the z value. 4. Find the p-value. 5. The communication professor should the null hypothesis.
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A random sample of n1 = 148 people ages 16 to 19 were taken from the island of Oahu, Hawaii, and 14 were found to be high school dropouts. Another random sample of n2 = 125 people ages 16 to 19 were taken from Sweetwater County, Wyoming, and 5 were found to be high school dropouts. Do these data indicate that the population proportion of high school dropouts on Oahu is different (either way) from that of Sweetwater County? Use a 1% level of significance. I need help with sketching, (d) and (e)
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OI al College is less likely to attend orientation than men before they begin their coursework. A random sample of freshmen at Oxnard College were asked what their gender is and whether they attended orientation. The results of the survey are shown below: Data for Gender vs. Orientation Attendance Select an answer Women Men 439 242 What can be concluded at the a = 0.01 level of significance? For this study, we should use Select an answer a. The null and alternative hypotheses would be: Yes 350 No 262 Ho: Select an answer ✓ Select an answer ✓ Select an answer ✓ (please enter a decimal and note that p1 and μl represent the proportion and mean for women and p2 and μ2 represent the proportion and mean for men.) H₁: b. The test statistic ? | = c. The p-value d. The p-value is ? ✓ a e. Based on this, we should f. Thus, the final conclusion is that ... Select an answer ✓ Select an answer (Please enter a decimal) (please show your answer to 3 decimal places.) (Please show your answer to 4…

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