statistics and probability
6:58 AT&T 6:59 AT&T 5. [1.25/3 Points] DETAILS PREVIOUS ANSWERS BBUNDERSTAT12 8.5.019.MIS. (w) Based on your answers in parts (a) to (c). will you reject or fail to reject the null hypothesis? Are the data statistically significant atlevel ex? MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER At the ex - 0.01 level, we fail to reject the pull myp e data are statistically significant A random sample of n, = 10 regions in New England gave the following violent crime rates (per million population). At the ex - 0.01 level, we reject the null hypothesis an late are statistically significant At the ex = 0.01 level, we reject the null hypothesis and conclude the data are not statistically significant 1: New England Crime Rate O At the ex = 0.01 level, we fail to nd conclude the data are not statistically significant 35 39 42 4.1 3.3 41 18 48 29 31 (v) Interpret your conclusion in the context of the application. Another random sample of my - 12 regions in the Rocky Mountain states gave the following violent crime rates (per million Fail to reject the null lopothesis. population). a insufficient evidence that vic time in the Rocky Mountain region is higher than in New England. *2: Rocky Mountain Crime Rate Reject the null hypothesis, there is insufficient England. the Rocky Mountain region is higher than in New 39 43 45 5.5 3.3 48 35 24 3.1 35 52 28 Fail to reject the null hypothesis, there is sufficient evidence the violent crime in the Rocky Mountain region is higher than in New England. LA USE SALT Reject the null hypothesis, there is on is higher than in New England. Assume that the crime rate distribution is approximately normal in both regions Need Help? Read It Master Be (a) Use a calculator to calculate x,. 5,. X2 ands2 (Round your answers to four decimal places) X, = 3.57 81 - 0.8473 - 3.9 6. [0/2 Points] 52 = 0.9705 DETAILS PREVIOUS ANSWERS BBUNDERSTAT12 8.5.033.5. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (b) Do the data indicate that the violent crime rate in the Rocky Mountain region is higher than in New England? Use a = 0.01. Based on information from a previous study. r, - 39 people out of a random sample of n, - 104 adult Americans who did notattend () What is the level of significance? college believe in extraterrestrials. However, out of a random sample of n2 = 104 adult Americans who did attend college, 2 = 48 claim D.01 that they believe in extraterrestrials. Does this indicate that the proportion of people who attended college and who believe in State the null and alternate hypo theses extraterrestrials is higher than the proportion who did not attend college? Use ox - 0.01. LA USE SALT (@) What is the level of significance? 0.01 State the null and alternate hypotheses. 0) What sampling distribution will you use? What assumptions are you making? OH,P,
0.250 The standard normal. The nu mber of vials is sufficiently large. O 0 125
