7. Listed below are systolic blood pressure measurements taken from the right an

Question

7. Listed below are systolic blood pressure measurements taken from the right and lett arrys of the same 5 women. Classify the two given samples as independent or dependent. Right arm Left arm 102 144 101 175 79 182 79 146 169 A. Dependent B. Independent C. The samples are two small to make a determination 8. We want to test if the two population means are different. Two samples are randomly selected and come from two independent populations that are normal. The sample statistics are given below: Find the p-value of the test. 81-29 1 1.5 #1.9 n:25 2 30 A. 0.034 = 28 B. 0.017 C. 0.029 D. 0.05 We want to test if the two population proportions are different. The sample statistics listed below are from independent samples: Find the p-value of the test 9. n 5035 X2 40 C. 0.25 n2 = 60 8. 0.35 D. 0.05 10. Do people tend to spend more money on fast-food when they use a credit card? The following data represent random samples of credit-card and cash purchases. Test whether the sample evidence suggests that people spend more when using credit card. Use :0.01 level of significance. Credit | 16.78 | 23.89 | 13.89-554 | 10.35 ·12.76 ·1832-1,2062-11835- 1916 - Cash110.76-1626118.98 111.36 678_1 21.7-1890-15.64113.78 9.21- A. p-value-0.019, there are sufficient evidence to conclude that people spend more when using credit card at a B. p-value 0.019; there are insufficient evidence to conclude that people spend more when using credit card at 0.01 level of significance. 0.01 level of significance. p-value :0.038, there are sufficient evidence to conclude that people spend more when using credit card at -0.01 level of significance p-value :0.038, there are insufficient evidence to conclude that people spend more when using credit card ar D. 0.01 level of significance. 11. To test a hypothesis about the difference between two proportions, each population must be at least times as large as the sample drawn from it. B. 10 8. 20 C 30 D. 40 12. To test a hypothesis about the difference between two proportions, each sample must contain at least individuals in each category 10 20 C. 30 D. 40

Explanation / Answer

7) DEPENDENT

8) t= x1bar-x2bar/sqrt(s1^2/n1+s2^2/n2)

t= 29-28/sqrt(1.5)^2/25+(1.9)^2/30)

t= 1/sqrt(2.25/25+3.61/30)

t=1/sqrt(0.09+0.1203)

t=1/sqrt(0.2103)

t=1/0.4586

t= 2.18

P value= 0.017

9) n1=50 x1=35 and p1=x1/n1= 35/50= 0.7

n2= 60 and x2 =40 p2= x2/n2= 0.67

p(hat)= x1+x2/n1+n2= 75/110= 0.6818

q(hat)= 1-p(hat)= 1-0.6818= 0.3182

Z= 0.7-0.67/SQRT(0.3182*0.6818(1/50+1/60))

Z= 0.03/0.08918

Z= 0.3363

P VALUE 0.35 OPTION B

PLEASE NOTE: I THINK YOU HAVE COMPLETED Q10,11 AND 12 BECAUSE THERE IS TICK MARK ON IT.

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