1. Albertsons plans to present the sales for the past 20 quarters in a chart. Which of the following charts would likely be most effective as showing the trend in sales for the company?

A. Pie Chart.

B. Histogram.

C. Line Chart.

D. Pareto Chart.

2. Mary Hill has recently been hired by an accounting firm and has been tasked with the job of estimating the mean invoice value for an audit client. The total number of invoices is 14,300. She has been instructed to develop a 95% confidence interval estimate for mean invoice value. She used a sample size of 100 invoices and obtained a confidence interval estimate of $100 ----- $200. Suppose Mary’s boss would like to see a smaller margin of error. Which of the following would NOT be an appropriate step for Mary to take to reduce the margin of error?

A. Increase the sample size.

B. Decrease the confidence level.

C. Decrease the sample size.

D. The margin of error cannot be reduced.

3. A histogram is very useful for displaying the distribution of a quantitative variable. For example, if we had a GPA data for 500 students, the histogram could be used to display GPA distribution. Which of the following would not be something that the histogram could provide to the analysts?

A. An indication of the center of the data.

B. An indication of the spread of the data.

C. The GPA for each individual student.

D. An indication about whether the GPA’s are skewed.

4. A student committee for the ASBSU is interested in surveying undergraduate students to determine whether they agree or disagree with a proposed student fee to be used to provide scholarships based on financial need. The committee proposed to survey students as they walked in or out of the Boise State library. By collecting the data in this manner the students are

A. Using simple random sampling.

B. Using convenience sampling.

C. Using stratified random sampling.

D. Using cluster sampling.