Question

Pg 417 6.47 

For a hypothesis test 

H0: p =  0.3 

Ha: p < 0.3 

a random sample of size n 200 is taken and the sample proportion p = 0.21 

(a) Determine whether it is appropriate to use the normal distribution to estimate the p-value. 

(b) If it is appropriate to use a normal distribution, complete the test for a significance level of 5% 

Pg 418 6.55 

Home Field in Baseball 2009 There were 2430 Major League Baseball games played in 2009, and the home team won the game in 54.9% of the games. Test to see if there is evidence at the 1% level that the home team wins more than half the games. Show all details of the test. 

Pg 423 6.63 

If random samples of size n = 1000 are taken from a population with a mean μ = 28 and standard deviation σ = 5, find the standard error of the distribution of sample means

Pg 430 6.81 

A random sample of size n = 30 is taken from a population that is approximately normally distributed, and the sample mean x̅ = 12.7 and the sample standard deviations s = 5.6 

(a) What is the best point estimate for the mean μ of the population? 

(b) Use the t-distribution to find a 95% confidence interval for the mean μ

(c) What is the margin of error for the confidence interval?

Answer 1