Assignment Solutions
A student suspected the average cost of a date was no longer \$30.00 To test her hypothesis, she randomly selected 16 men and asked them how much they had spent…
A math instructor has written a new placement exam. He is concerned that the exam may be too long. The instructor claims that the average length of time required to…
Percentages of ideal body weight were determined for 18 randomly selected insulin dependent diabetics and are shown below: A percentage of 120 means that an individual weighs 20% more than…
"Average adult Americans are about one inch taller, but nearly a whopping 25 pounds heavier than they were in 1960, according to a new report from the Centers for Disease…
Is lighter better? A random sample of men's soccer shoes from an international catalog had the following weights (in ounces). 10.8 9.8 8.8 9.6 9.9 10 8.4 9.6 10 9.4…
Body mass index is calculated by dividing a person's weight by the square of her height; it is a measure of the extent to which the individual overweight. For the…
Is the Diet Practical? When 40 people used the Weight Watchers diet for one year, their mean weight loss was 3.0 lb and the standard deviation was 4.9 lb (based…
The mean BMI in patients free of diabetes was reported as 28.2. The investigator conducting the study described in Problem 1 hypothesizes that the BMI in patients free of diabetes…
E. canis infection is a tick-borne disease of dogs that is sometimes contracted by humans. Among infected humans,the distribution of white blood cell counts has an unknown mean $\mu$ and…
Suppose the number of beds filled per day in a medium sized hospital is normally distributed. A hospital administrator tells the board of directors that, on the average, at least…
