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A special industrial battery must have a life and at least 400 hours. A hypothesis test is to be conducted with a 0.02 level of significance. If the batteries from a particular production run have an actual mean use life of 385 hours, the production manager wants a sampling procedure that only 10% of the time would show erroneously that the batch is acceptable. What sample size is recommended for the hypothesis test? Use 30 hours as an estimate of the population standard deviation.
Super Cola Bottles soft drinks labeled "net weight 16 ounces." An overall process average of 16.01 ounces has been found by taking several batches of samples, in which each sample contained 5 bottles.
Ms. Tina Stevens just purchased a new dress that cost $120. What is the probability she paid cash or check? (Round your answer to 3 decimal places.)
The original simple form of the Connecticut state lottery (ignoring a few gimmicks) awarded the following prizes for each 100,000 tickets sold. The winners were chosen by drawing tickets at random. If you hold one ticket in this lottery, what is y..
Prediction equation is y^ = 30 + 0:60x. Determine predicted final exam score for student who has (i) midterm score = 100, (ii) midterm score = 50. Note that predicted nal exam score regresses toward mean.
A senior accounting major at Midsouth State University has job offers from four CPA firms. To explore the offers further, she asked a sample of recent trainees how many months each worked for the firm before receiving a raise in salary.
Small Wonder, an amusement park, experiences seasoned attendance. It has collected two years of quarterly attendance data and made a forecast of annual attendance for the upcoming year.
A survey was conducted to measure height off men. In survey, respondents were grouped by age. In the 20-29 age group, the heights were normally distributed, with a mean of 69.2 inches and a standard deviation of 2.0 inches.
The z-score of 1.33 tells you that Eric's time to get to work is 1.33 standard deviations from the mean.
Pedro wants to know if the weight loss of his group on the chocolate-only diet is representative of weight loss in a large population of middle aged men.
a) Test whether there is a difference between attitudes in the 2 cities. Use a 95% alpha. b) What does your result say about attitude consistency across cities?
The mean, median, and mode are the most common measures of dispersion (spread).
Can we conclude that more than 60% of retired people in the age group would return to work? I need to do a Hypothesis Testing using only P value format (Explain in everyday words but also have the formal steps show with results) on this problem.
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