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A sample of 16 items provides a sample standard deviation of 9.5. Test the following hypotheses using a = .05.
? 0 : s 2 = 50
? a : s 2 > 50
Calculate the value of the test statistic (to 2 decimals).
Fit both linear and an exponential trend to the data. (d) Which model is preferred? Why? (e) Make a forecast for 2003, using a trend model of your choice (or judgments forecast).
A city official has stated that 20% of the items sold by pawn shops within the city have been stolen. Ralph has just purchased 4 items from one of the city's pawn shops.
List all outcomes corresponding to the five smallest possible values of Y, and state which Y value is associated with each one.
You have been retained as a consultant to SarParKingsGraUsch. Your job is to determine if this particular overbooking strategy is sound. Use simulation methods to perform your analysis.
A company ships computer components in boxes that contain 20 iteams. Assume the probability of a defective component is .4. use the geometric distribution to find the probability that the first defect is found in the third or fourth component test..
In the study of 15 taxi drivers, average experience was 11.2 years. Standard deviation was 2. At α = .10, is number of years' experience of taxi drivers really less than taxi company claimed?
We can determine the following information about the amount remaining in a toothpaste tube without invading anyones privacy. How much toothpaste would you expect to be remaining in the tube?
Four different types of fertilizers are used on raspberry plants. The number of raspberries on each randomly selected plaint is given below.
Determine the sample size necessary to estimate a population proportion to within .03 with 90% confidence assuming you have no knowledge of the approximate value of the sample proportion.
To be fair, the firm is randomly selecting two different employee names to 'win' the tickets. There are 6 secretaries, 5 consultants and 4 partners in the firm. Which of the following statements is not true?
Explain clearly why the matched pairs t test is the proper choice and do a complete analysis for the question that is posed here.
BMI in children is approximately normally distributed with a mean of 24.5 and a standard deviation of 6.2. A BMI between 25 and 30 is considered overweight. What proportion of children are overweight?
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