Several years ago, the mean height of women 20 years of age or older was 63.7 inches. Suppose that a random sample of 45 women who are 20 years of age or older today results in a mean height of 64.2 inches. (a) State the appropriate null and alternative hypotheses to assess whether women are taller today. (b) Suppose the P-value for this test is 0.16. Explain what this value represents. (c) Write a conclusion for this hypothesis test assuming an a=0.10 level of significance. (a) State the appropriate null and alternative hypotheses to assess whether women are taller today. O A. Ho =63.7 in. versus H,: µ<63.7 in. O B. Ho H= 64.2 in. versus H, p#64.2 in. O C. Ho =64.2 in. versus H,: p<64.2 in. O D. H, u=63.7 in. versus H,: p#63.7 in. O E. Ho = 63.7 in. versus H,: µ>63.7 in. O F. H, u=64.2 in. versus H,: µ> 64.2 in. (b) Suppose the P-value for this test is 0.16. Explain what this value represents. O A. There is a 0.16 probability of obtaining a sample mean height of 63.7 inches or taller from a population whose mean height is 64.2 inches. O B. There is a 0.16 probability of obtaining a sample mean height of 64.2 inches or taller from a population whose mean height is 63.7 inches. O C. There is a 0.16 probability of obtaining a sample mean height of 64.2 inches or shorter from a population whose mean height is 63.7 inches. O D. There is a 0.16 probability of obtaining a sample mean height of exactly 64.2 inches from a population whose mean height is 63.7 inches.

An instructor wanted to know if his students are better at math or writing. He had students take both a math and then a writing test and he compared the results using SPSS. He found the following results: ( look at graphs )  a. What test was done?b. Report results in APA style.

For a right sided, one-tailed test, the test statistic z is calculated to be zero. The p-value corresponding to this calculated test statistic is, a. 0.50 b. zero c. -0.50 d. 1.00

You want to compare differences in prior arrests across ethnicity in your study, you measured ethnicity as white =0 black =1 hispanic=2, and other =3. Prior arrests was recorded as the number of prior arrests. which test would you perform to see if arrests differ across diffrent ethnic categories? A. ANOVA B. T-test

What is true about a the p-value for a two sided test relative to the p-value for a one-sided test? a. It is twice as large b. It is the same c. It is twice as wide d. False e. It is half as wide

Several studies showed that after eating a low-fat cereal for two meals a day​, subjects had lost some weight.A cereal companyfinanced this research. Identify what is wrong. Choose the correct answer below.     A. Since the research is composed of voluntary response​ samples, there may be key data points missing.   B. The data used in the studies is not reliable because it was not measured by the administrator.   C. It is questionable that the sponsor is a cereal company because this sponsor can be greatly affected by the conclusion.   D. It is not possible to take accurate measurements.

A statistician changes her level of significance from .001 to .05.  What impact will this change have on her risk of making a Type I and Type II error?  Is the change in the level of significance a good decision?  Why or why not?