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Q1) Recent article in Vitality magazine reported that mean amount of leisure time week for American men is 40.0 hours. You think this figure is too large and decision to carry out your own test. In random sample of 60 men, you determine that mean is 37.8 hours of leisure per week and that standard deviation of sample is 12.2 hours. Can you conclude that information in article is untrue? Use 0.05 significance level. Find out p-value and explain its meaning.
Q2) Dole Pineapple, Inc., is concerned that 16-ounce can of sliced pineapple is being overfilled. Suppose the standard deviation of process is 0.03 ounces. Quality-control department took random sample of 50 cans and found that arithmetic mean weight was 16.05 ounces. At 5% level of significance, can we conclude that mean weight is greater than 16 ounces? Find out the p-value.
What is the 95% confidence interval estimate of the population mean cost for a prescription of Zocor?
If true explain and if false give an example. a. The significance level of a statistical test is equal to the probability that the null hypothesis is true. b. If the significance level of a test is decreased, the power of the test would be expected t..
Assume that 60 percent of the voters in a particular region support a candidate. Find the probability that a sample of 1,000 voters will yield a sample proportion in favor of the candidate within 4 percentage points of the actual proportion.
The table given below shows joint probability distribution of X and Y . Determine the covariance between the X and Y ?
Which of the following models are appropriate to forecast a time series whose amplitude increases over time?
The probabilities of low, medium and high compliance are 0.3, 0.4, and 0.3, respectively
Establish an approximate design to MTBF required for a system that will result in an approximate minimum total cost over a five year period if the system is to be operated 7500 hours per year
Mean and standard deviation are 584.6 and 34.28
Calculate the value of the chi-square statistic and test whether all regions are statistically the same at 5% and 1% level tests.
Mean threshold values and standard deviations for the three groups are given below. Normal probability plots showed the three populations were well approximated by the Normal distribution.
What is the probability of receiving more than three pieces of junk mail today?
Robinson & Associates performs employment screening for large companies in southern California. It usually follows two-step process. First potential applicants are given a test that covers basic knowledge and intelligence. If applicants score b..
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