# Quiz 1 Essay

834 Words Jan 23rd, 2015 4 Pages
The general manager of the grocery store Wegmans in Canandaigua, NY, wants to know the average (typical) amount of time it takes for a customer to check out of his grocery store. Last Saturday between the hours of 8 am and noon the manager, along with a team of helpers, measured the amount of time it took the first 200 customers to check out at each of its open registers. The helpers recorded the time (in minutes) using a stop watch, starting when a customer first arrived at a line and ending when they had paid and received their receipt. The average time for the sample was 6.5 minutes.

Answer each of the following questions pertaining to the above paragraph. (40 points)

a) Identify the population being targeted by this study.
a. The
h) What's your best estimate for the value of the parameter? Explain how accurate this estimate is.
a. I think the average check out time would be somewhere about 8-9 minutes because there are some lurking variables that may not have been taken into consideration with the original sample. Even though it is an educated estimate, it’s still not entirely accurate.

2. Consider each of the variables below. For each variable: (20 points) 1) Identify whether each is quantitative or qualitative.
2) For each variable that you identify as quantitative, state whether it is discrete or continuous.
a) The number of career runs batted in (RBI’s) by Derek Jeter of the New York Yankees. Quantitative, discrete
b) Types of vehicles produced by Ford Motor Company. Qualitative
c) The amount of soda in a 16 ounce bottle of Coca-Cola. Quantitative,
d) The age of an FLCC faculty member. Qualitative, continuous

3. Identify each as a random sample, stratified sample, systematic sample, cluster sample or convenience sample. Use each type only once. (20 points)

a) To determine his DSL Internet connection speed, George divides the day into morning, midday, evening, and late night. He then measures his Internet connection speed at 5 randomly selected times during each of the four parts of the day.
1. Stratified sample
b) A group of lobbyists has a list of the 100 U.S. Senators. In order to determine the Senate's position on a particular issue, they decide to talk with every 10th