1. In regression model, ____________is the estimated change in the dependent variable associated with one unit change in the dependent variable

2. If the average value of an estimator equals the population parameter being estimated, the estimator is____________.

3. Suppose the mean income of firms in the industry for a year is 90 million dollars with a standard deviation of 3 million dollars. If income for the industry is distributed normally, what is the probability that a randomly selected firm will earn between 84 and 95.1 million dollars

4. The mean number of hours of part-time work per week for a sample of 278 Metro State students is 20.If the margin of error for the population mean with a 95% confidence interval is 1.5, construct a 95% confidence interval for the mean number of hours of part-time work per week for Metro State University students. (4 points)

Lower Limit: ____________

Upper Limit: ____________

5. A research scientist wants to know how many times per hour a certain strand of germ reproduces. He obtains information from 327 strands of this particular germ and finds the mean to be 8.3 with a population standard deviation known to be 5.2.

The population distribution is assumed to be skewed to the left.

Determine which of the following methods would be most appropriate when calculating the margin of error for the population mean: (3 points)

A) Normal z-distribution B) Student t-distribution C) More advanced statistical techniques