(06.06 LC)  A cell phone company is interested in the relationship between the number of texts per minute for their customers (y) and customer age. Based on the collected data, the least-squares regression line is ŷ = 3.27 + 2.14x, where x is the number of years by which age exceeds 12. Which of the following statements best describes the meaning of the slope of the least-squares regression line? (3 points)

(04.06 MC)  The mean household income for a certain state is $69,000 with a standard deviation of $10,000. Assuming a Normal distribution, about 95 percent of all households have an income over what amount? (4 points)

(05.02 MC)  The amount people whopay for cable service varies quite a bit, but the mean monthly fee is $142 and the standard deviation is $29. The distribution is not Normal. Many people pay about $76 for basic cable and about $160 for premium service, but some pay much more. A sample survey is designed to ask a simple random sample of 1,500 cable service customers how much they pay. Let x̄ be the mean amount paid. Part A: What are the mean and standard deviation of the sample distribution of x̄? Show your work and justify your reasoning. (4 points) Part B: What is the shape of the sampling distribution of x̄? Justify your answer. (2 points) Part C: What is the probability that the average cable service paid by the sample of cable service customers will exceed $143? Show your work. (4 points) (10 points)

The screening tool most effective for detecting the possibility of autism is:

Screen for Social Determinants of Health (SDoH) is important. Which of the following is true:

(05.04 MC)  A researcher has conducted a survey using a simple random sample of 225 elementary teachers to create a confidence interval to estimate the proportion of elementary teachers favoring the addition of a soda machine to the cafeteria. Assume that the sample proportion does not change. The researcher now decides to survey a random sample of 25 teachers instead of 225 elementary teachers. Which of the following statements best describes how the confidence interval is affected by this change? (3 points)

One pound of weight is equal to 

In order to increase the size of your muscles you must increase the number of muscle fibers you have.  

Most all fruits and vegetables are carbs. 

(06.07 MC)  A sample of 10 trucks was taken, and the horsepower to weight was recorded. The computer output for regression is below: What is the equation of the regression line? (4 points)