Question

Need help with questions 44-47?

MTH 243 HOMEWORK 1.1 Definitions of Statistics, Probability, and Key Terms For each of the following eight exercises, identify: a. the f the data. Give examples where appropriate population, b the sample, c. the parameter, d. the statistic, e the vaniable, and center is interested in the mean amount of time a client exercises in the center each week ki resorts are interested in the mean age that children take their first ski and snowboard lessons. They need this information to plan their ski classes optimally. Sample 44 A cardiologist is interested in the mean recovery period of her patients who have had heart attacks 45 Insurance companies are interested in the mean health costs each year of their clients, so that they can determine the costs of health insurance 46. A politician is interested in the proportion of voters in his district who think he is doing a good job. 47 A marriage counselor is interested in the proportion of clients she counsels who stáy married 48 Political pollsters may be interested in the proportion of people who will vote for a particular cause 49 A marketing company is interested in the proportion of people who will buy a particular product Ise the following information to answer the next three exercises A Lake Tahoe Community College instructor is interested in the mean umber of days Lake Tahoe Community College math students are absent from class during a quarter 50 What is the population she is interested in? a all Lake Tahoe Community College students

Answer 1

44
Population - All the patients of the cardiologist who have suffered heart attacks.
Sample - A small number of patients randomly selected from the list of all patients of the cardiologist who have suffered heart attacks.
Parameter - mean recovery period of the patients who have had heart attacks.
Statistic - mean recovery period of those patients who have been randomly selected in the sample.
Variable - recovery period of one patient who have had a heart attack.
Data - recovery periods (in days) of the patients of the cardiologist, who have had heart attacks.

47
Population - the clients of the counsellor
sample - randomly selected few clients
parameter - proportion of all clients of the counsellor who stay married
statistics - the proportion of all clients of the counsellor who stay married
variable - number of clients who stay married
Data - responses of the variable in yes or no