# Question: Listed below are the ages years of randomly selected race

Listed below are the ages (years) of randomly selected race car drivers (based on data reported in USA Today). Most people in the general population have ages that vary between 0 and 90 years, so use of the range rule of thumb suggests that ages in the general population have a standard deviation of 22.5 years. Use a 0.01 significance level to test the claim that the standard deviation of ages of all race car drivers is less than 22.5 years.

32 32 33 33 41 29 38 32 33 23 27 45 52 29 25

Identify the null hypothesis, alternative hypothesis, test statistic, P-value or critical value(s), conclusion about the null hypothesis, and final conclusion that addresses the original claim. Assume that a simple random sample is selected from a normally distributed population.

32 32 33 33 41 29 38 32 33 23 27 45 52 29 25

Identify the null hypothesis, alternative hypothesis, test statistic, P-value or critical value(s), conclusion about the null hypothesis, and final conclusion that addresses the original claim. Assume that a simple random sample is selected from a normally distributed population.

**View Solution:**## Answer to relevant Questions

Listed below are speeds (mi/h) measured from southbound traffic on I-280 near Cupertino, California (based on data from SigAlert). dhis simple random sample was obtained at 3:30 p.m. on a weekday. Use a 0.05 significance ...For large numbers of degrees of freedom, we can approximate critical values of x2 as follows: Here k is the number of degrees of freedom and z is the critical value(s) found from technology or table A-2. In Exercise 5 we ...Listed below are measured amounts of lead (in micrograms per cubic meter, or mg/m3, in the air. The Environmental Protection Agency has established an air quality standard for lead of 1.5 mg/m3. The measurements shown below ...Refer to the sample data given in Exercise 1. Given that the dictionary has 1459 pages with defined words, the claim that there are more than 70,000 defined words is the same as the claim that the mean number of defined ...a. Assume that we want to use a 0.05 significance level to test the claim that p1 < p2. If we want to test that claim by using a confidence interval, what confidence level should we use? b. If we test the claim in part (a) ...Post your question