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According to the "freshman 15 Legend, college freshmen gain 15 pounds (or 6.8 kilograms) during their freshman year. Listed below are the amounts of weights of weight change in kilograms for a simple random sample of freshmen included in a study (). Positive values correspond to students who gained weight and negative numbers correspond to students who lost weight. Is a weight fain of 15 pounds of (6.8) kilograms unusual? Why or why not? If 15 pounds (or6.8kilograms) is not unusual does that support the legend of the "freshman 15"?11 3 0 -2 3 -2 -2 5 -2 7 2 4 18 1 0 -5 2
Should you use a two tailed test versus the one tailed test? If the hypothesis is non-directional and you predict a difference between the means but do not specify which mean will be higher a two tailed test should be used.
Classify the following as an example of nominal, ordinal, interval, or ratio level of measurement, and state why it represents this level: Gender of employees at a local warehouse.
Several questions will be asked but the main outcome measure of interest will be the percentage of customers who were completely satisfied and plan to return and the average amount spent.
The rest have no opinion. " Suppose that a a sample of 100 American adults is quizzed on the subject. What is the probability of the following events?
Your company manufactures low calorie frozen dinners. The advertised calorie content is 200 calories. A consumer activist group, FACT: fat and calories tribunal, is claiming that your product is not consistent.
Horace Mann, principal of Jones Public School, has decided to construct a time series model to obtain a 2- and a 3-period moving average to forecast student enrollments for next term.
Use the marginal probabilities of school quality, school cost or convenience, and other to comment on the most important reason for choosing a school.
How closely is the height of an individual related to the weight? Partial regression output for a sample of 92 individuals is below.
Grindit & Floggit Ltd. make customized Widgets at a cost of $150 per unit of which 3% (on average) happen to be out of tolerance. Up to 115 Widgets can be produces in one continuous run whose set up incurs an additional cost of $10 000.
Why do you use the chi-square statistic? What type of data is used with chi square analysis?
Summarize the NSC concentrations graphically and numerically for each type of forest. How do dry forests compare to moist forests in terms of NSC concentrations?
At the 0.05 significance level, can he conclude that number of absences has declined? calculate approximately the p -value.
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