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contribution rate of 4.81% in past campaigns, K The Paralyzed Veterans of America recently sent letters to a random sample of 100,000 potential donors and received 4781 donations. They've had but a staff member worries that the rate is lower now that they've redesigned their letter. Is there evidence that the 4.78% they received is evidence of a real drop in the contribution rate? Complete parts a through c below. Assume the independence assumption is met. OB. Ho: p=0.0481 HA: P 0.0481 OC. Ho: p*0.0481 HA: P=0.0481 OD. Ho: p<0.0481 HA: P=0.0481 O E. Ho: p=0.0481 HA: P>0.0481 OF. Ho: p>0.0481 HA: P=0.0481 b) Are the assumptions and conditions for inference met? Which assumptions and conditions below are met? Select all that apply. A. The success/failure condition is met. B. The independence assumption is met. C. The 10% condition is met. D. The randomization condition is met. c) Do you think the donation rate would drop? The test statistic is z = (Round to two decimal places as needed.)

contribution rate of 4.81% in past campaigns, K The Paralyzed Veterans of America recently sent letters to a random sample of 100,000 potential donors and received 4781 donations. They've had but a staff member worries that the rate is lower now that they've redesigned their letter. Is there evidence that the 4.78% they received is evidence of a real drop in the contribution rate? Complete parts a through c below. Assume the independence assumption is met. OB. Ho: p=0.0481 HA: P 0.0481 OC. Ho: p*0.0481 HA: P=0.0481 OD. Ho: p<0.0481 HA: P=0.0481 O E. Ho: p=0.0481 HA: P>0.0481 OF. Ho: p>0.0481 HA: P=0.0481 b) Are the assumptions and conditions for inference met? Which assumptions and conditions below are met? Select all that apply. A. The success/failure condition is met. B. The independence assumption is met. C. The 10% condition is met. D. The randomization condition is met. c) Do you think the donation rate would drop? The test statistic is z = (Round to two decimal places as needed.)

MATLAB: An Introduction with Applications
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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contribution rate of 4.81% in past campaigns, K The Paralyzed Veterans of America recently sent letters to a random sample of 100,000 potential donors and received 4781 donations. They've had but a staff member worries that the rate is lower now that they've redesigned their letter. Is there evidence that the 4.78% they received is evidence of a real drop in the contribution rate? Complete parts a through c below. Assume the independence assumption is met. OB. Ho: p=0.0481 HA: P 0.0481 OC. Ho: p*0.0481 HA: P=0.0481 OD. Ho: p<0.0481 HA: P=0.0481 O E. Ho: p=0.0481 HA: P>0.0481 OF. Ho: p>0.0481 HA: P=0.0481 b) Are the assumptions and conditions for inference met? Which assumptions and conditions below are met? Select all that apply. A. The success/failure condition is met. B. The independence assumption is met. C. The 10% condition is met. D. The randomization condition is met. c) Do you think the donation rate would drop? The test statistic is z = (Round to two decimal places as needed.)
Transcribed Image Text:contribution rate of 4.81% in past campaigns, K The Paralyzed Veterans of America recently sent letters to a random sample of 100,000 potential donors and received 4781 donations. They've had but a staff member worries that the rate is lower now that they've redesigned their letter. Is there evidence that the 4.78% they received is evidence of a real drop in the contribution rate? Complete parts a through c below. Assume the independence assumption is met. OB. Ho: p=0.0481 HA: P 0.0481 OC. Ho: p*0.0481 HA: P=0.0481 OD. Ho: p<0.0481 HA: P=0.0481 O E. Ho: p=0.0481 HA: P>0.0481 OF. Ho: p>0.0481 HA: P=0.0481 b) Are the assumptions and conditions for inference met? Which assumptions and conditions below are met? Select all that apply. A. The success/failure condition is met. B. The independence assumption is met. C. The 10% condition is met. D. The randomization condition is met. c) Do you think the donation rate would drop? The test statistic is z = (Round to two decimal places as needed.)
In 1992 a national vital statistics report indicated that about 2.3% of all births produced twins. Is the rate of twin births the same among very young mothers? Data from a large city hospital found only 7 sets of twins were born to 455 teenage girls. Test an appropriate hypothesis and state your conclusion. Be sure the appropriate assumptions and conditions are satisfied before you proceed. Are the assumptions and the conditions to perform a one-proportion z-test met? O No Yes State the null and alternative hypotheses. Choose the correct answer below. OA.. Ho: p=0.023 HA: P >0.023 B. Ho: p=0.023 HA: P = 0.023 OC. Ho: p=0.023 HA: P<0.023 OD. The assumptions and conditions are not met, so the test cannot proceed. Determine the z-test statistic. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. z = -1.08 (Round to two decimal places as needed.) The assumptions and conditions are not met, so the test cannot proceed. Find the P-value. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. ОВ OA. P-value= (Round to three decimal places as needed.) OB. The assumptions and conditions are not met, so the test cannot proceed.
Transcribed Image Text:In 1992 a national vital statistics report indicated that about 2.3% of all births produced twins. Is the rate of twin births the same among very young mothers? Data from a large city hospital found only 7 sets of twins were born to 455 teenage girls. Test an appropriate hypothesis and state your conclusion. Be sure the appropriate assumptions and conditions are satisfied before you proceed. Are the assumptions and the conditions to perform a one-proportion z-test met? O No Yes State the null and alternative hypotheses. Choose the correct answer below. OA.. Ho: p=0.023 HA: P >0.023 B. Ho: p=0.023 HA: P = 0.023 OC. Ho: p=0.023 HA: P<0.023 OD. The assumptions and conditions are not met, so the test cannot proceed. Determine the z-test statistic. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. z = -1.08 (Round to two decimal places as needed.) The assumptions and conditions are not met, so the test cannot proceed. Find the P-value. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. ОВ OA. P-value= (Round to three decimal places as needed.) OB. The assumptions and conditions are not met, so the test cannot proceed.
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