A researcher is interested in studying the relationship between ...

[Ebrown]

A researcher is interested in studying the relationship between money and marriages. He randomly stopped adults at a shopping mall on a Saturday afternoon and asked them to fill out a questionnaire. The questions included:
 
  1. Are you married?
  2. How much do you have in your savings account?
  3. Do you have a separate account from your spouse?
 
  a. Identify the experimental units in this study.
  b. Identify the variables of interest. Are they quantitative or qualitative variables?
  c. Identify the data collection method used.
  d. Do you think the sample resulting from this study is one representative of the population? Explain.
  e. Do you think this sample qualifies as a random sample?

Question 2

A local rental car agency has 50 cars. The rental rate for the winter months is 60. Find the probability that in a given winter month at least 35 cars will be rented. Use the normal distribution to approximate the binomial distribution.
 
  Round the standard deviation to three decimal places to work the problem.

[jaymee143]

Answer to Question 1

a. adults
b. marital status: qualitative;  in savings account: quantitative; separate accounts: qualitative
c. survey
d. no; the adults that were at the mall on that day and were willing to fill out the questionnaire cannot be guaranteed to be representative of all adults
e. no

Answer to Question 2

P(x  34.5 ) = 0.0968

[Ebrown]

Thanks for the timely response, appreciate it

[Dominic]

Excellent