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A food and nutrition organization reported that 27 out of every 100 people want to lose weight. If 380 student were surveyed at random in the student union, how many would wan to lose weight?
a coin is tossed twice. let z denote the number of heads on the first toss and w the total number of heads on the 2
1) Ace Car Rental has three main models that are used in it midsize range of cars. The cars are very similar and perform at about the same level. Since the customer has to pay for the gas use during the rental period, the manager is often asked about..
Describe the statistical method used in the cited research studies. Summarize results, limitations of results, conclusions, and applications.
the manager of a pizza parlor claims his employeeampamp39s make an average of 4.50 per hour with a standard deviation
At the 5 percent level of significance, does this sample prove a violation of the guideline that the average patient should pay no more than $250 out-of-pocket? State your hypotheses and decision rule.
Estimate the difference in the proportion of female students taking the biology exam and female students taking the calculus AB exam using a 90% confidence
An article from the Associated Press (May 14, 2002) led with the headline "Academic Success Lowers Pregnancy Risk." The article described
the average number of field mice per acre in a 5-acre wheat field is estimated to be 12. find the probability that
You are using an exponential smoothing model for forecasting. The running sum of the forecast error statistics (RSFE) are calculated each time a forecast.
Use .05 significance level to test the claim that fewer than half of all teenagers in the population feel that their greatest source of pressure. Find test statisctic and P value.
Note the size of the sample n is greater than 5% of the population size. Use the probability distribution that best describes this situation.
The following frequency table lists the sales of an item and the number of times it has occurred. It was obtained from historical records. Sales/Frequency: 10/100, 15/120, 20/300, 25/350, 30/400, 35/500, 40/300, 45/170.
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