Statistics - Hypothesis Testing Projects

Complete Exercise 7.5: Heights of 10-year-old boys in Chapter 7. Be sure to answer questions (a), (b),

Problem 1: Complete Exercise 7.5: Heights of 10-year-old boys in Chapter 7. Be sure to answer questions (a), (b), and (c).

Heights of 10-year-old boys. We've established that heights of 10 –year old boys vary according to a Normal distribution with $\mu=138$ centimeters and $\sigma=7$ centimeters.

What proportion of this population is less than 150 centimeters tall?
What proportion is less than 140 centimeters in height?
What proportion is between 150 and 140 centimeters?

Problem 2: Open the alcohol.sav data. Determine if the distribution of age is close to a Normal distribution using SPSS.

Note: If you need to download the data set again, click the link below.

Week 5 Data Set: alcohol.sav data

Problem 1 : Complete Exercise 8.3: Parameter or statistic? in Chapter 8. Be sure to answer questions (a), (b), and (c).
Parameter or statistic? Say whether each of the boldface numbers is a parameter or a statistic.

(a) Insured? A data set based on 168 hospital discharge summaries shows that $\mathbf{2 0} \%$ of patients were uninsured. (The review takes place in a large referral hospital.)

(b) Percent African American. Data from a standard metropolitan area (SMA) indicate that $\mathbf{1 2 \%}$ of the inhabitants are African American. A telephone survey that was based on a random-digitdialing machine found that $\mathbf{8} \%$ of respondents were African American.

(c) Cost of antibypertensive medication. Data from 10 online pharmacies reveal that the average cost of a 1-month supply of a particular medication is $\mathbf{\$ 3 1 . 2 0}$ with standard deviation $\mathbf{\$ 7 . 7 5}$. Data from 10 community pharmacies shows an average cost of $\mathbf{\$ 3 3 . 1 8}$ with standard deviation $\mathbf{\$ 7 . 8 8}$.

Problem 2: Download the data set body-weight.sav. Calculate a 95% CI for weight using SPSS. Download the data set by clicking the link below.