Essay Question:  2. The Highway Safety Department wants to study the driving habits of individuals. A sample of 121 cars traveling on the highway revealed an average speed of 60 miles per hour with a standard deviation of 11 miles per hour. 

Essay Question: 1(a). What is the point estimate for the proportion of people who liked the chocolate bar? The point estimate for the proportion of people who liked the chocolate bar is .

Essay Question: 4(a).3. What is the shape of the distribution? Provide the work to support your conclusion. 

Essay Question: 3. An extensive study of the cost of health care in the United States presented data showing that the mean spending per Medicare enrollee in 2003 was $6883 (Monday, Fall 2003). To investigate differences across the country, a researcher took a sample of 49 Medicare enrollees in Indianapolis with a mean spending of $5978.32 and a standard deviation is $2513. 

Essay Question: 2(b). At 95% confidence, what is the margin of error for the interval estimate of mean speed of all cars? 

Refer to Exhibit 3. The mean square between treatments is ___________. 

Refer to Exhibit 1. The probability of assembling the product in 8 minutes or less is

From a population that is normally distributed, a sample of 25 elements is selected and the standard deviation of the sample is computed. For the interval estimation of µ, the proper distribution to use is the

Essay Question:  1(c). Construct a 95% confidence interval for the true proportion of people who liked the chocolate bar. 

The absolute value of the difference between the point estimate and the population parameter it estimates is