Bone Mineral Density in San Diego

As the population ages, loss of bone mass is an indicator for the greater threat of osteoporosis in the population. Osteoporosis can increase the risk of falls and fractures, both of which lead to great morbidity and sometimes mortality in an older population. A research study of 200 individuals in San Diego, CA, found that the mean score for bone mineral density (BMD) was 1.1, with a standard deviation of 0.8. The population mean in the US for BMD is 1.5. Is the mean BMD in San Diego significantly lower than the national average? Assume alpha=.05.

Question 16

A) What is the null hypothesis?

B) What is the research hypothesis?

Question 16 options:

Question 17

What is the appropriate test statistic?

Question 17 options:

A)

Z-test

B)

t-test

C)	F-test (ANOVA)

D)	Chi-Square Goodness of Fit

E)	Chi-Square Test of Independence

Question 18

What is the critical value for the test statistic? Just give the number, not the name of the test. Round the numberto the nearest hundredths place.

Question 18 options:

Answer

Question 19

What is the test statistic for this study? Just give the number, not the name of the test. E.g. for Z-test, upper-tail, just write:

2.31

Do not write: z-test = 2.31, etc.

Question 19 options:

Answer

Question 20

Write the conclusion

Question 20 options: