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1. A research firm observes that men are twice as likely as women to watch the Super Bowl on television. Does this information represent descriptive statistics or inferential statistics? Why?
2. For each of the following, indicate whether the appropriate variable would be qualitative or quantitative. If you identify the variable as quantitative, indicate whether it would be discrete or continuous.
a. Whether you own a Panasonic television set
b. Your status as either a full-time or a part-time student
c. The number of people who attended your school's graduation last year
d. The price of your most recent haircut
e. Sam's travel time from his dorm to the student union
f. The number of students on campus who belong to a social fraternity or sorority
To revise an existing inventory system, a company needs to know something about the lead time for orders it places for a critical part. The company looks at the last 20 orders placed and finds that the lead time in days are:
suppose that the service life in years of a hearing aid battery is a random variable having a weibull distribution with
it is claimed that in a bushel of peaches less than ten percent are defective. a sample of 400 peaches is examined and
a computer retail store has 15 personal computers in stock. a buyer wants to purchase 4 of them. unknown to either the
find the indicated z score. the graph depict the standard normal distrubiton of blood count scores with mean of 0 and
A human resources director, on learning about the regression effect, decides to hire people who have been fired by their previous employer for poor performance.
A director of an agency is hiring temporary help. In making plans, he has to know whether there isi any difference in the use of the agency at different seasons of the year.
A company has two different processes that make credit cards. Suspecting that machine B has a higher variability than machine A the manager orders a test to be run. The following data was collected:
Interpret the interaction graph in terms of what it shows about the three effects tested.
1. let x equal the number of alpha particles counted by a geiger counter during 30 seconds. assume that the
A 90% confidence interval estimate for a population mean was computed to be (38.2, 59.4). Determine the mean of the sample, which was used to determine the interval estimate.
Be certain to mention the direction of the relationship, the strength of the relationship, and whether our findings are statistically significant
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