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The average hourly wage last year for members of the hospital clerical staff in a large city was $6.32. The standard deviation of the population was $.54. This year a sample of 50 workers had an average hourly wage of $6.51. Test the claim at alpha-.05 that the average wage has not changed by finding the p-value for the test.
Judging from recent experience, 5 percent of the computer keyboards produced by an automatic, high-speed machine are defective
The results of the simple linear regression are provided below.
A) Describe the term population. B) Describe the term random sample. C) What is the difference between a population and a random sample?
A researcher believes that if she uses a different text the students will score differently on the standardized test but she doesn't know what the difference is.
Expected value, variance and standard deviation.A volunteer ambulance service handles 0 to 5 service calls on any given day. The probability distribution for the number of service calls is as follows.
A person asks, "what do you think is the ideal number of children for a family to have?" The 497 females who responded had a median of 2, mean of 3.02, and a standard deviation of 1.81.
Find out the cheapest way of manufacturing today's batch of NasaMist.
Compute the mean, variance and standard deviation for the grouped data. Based on the previous answer, how much could the realtor expect to make if he sells 3 houses?
A IRS auditor randomly selects 3 tax returns from 48 returns of which 9 contain errors. What is the probability that she selects none of those containing errors? Round to four decimal places.
Steve then conducts a one-sample t-test on the data, knowing that there is an established mean for the publication of others that have taken this test of 6.
Suppose you obtain a 100 bag random sample by taking 25 subgroups of 4 bags each, the mean weight of the 25 subgroups was 16.00 ounces with a total of the subgroup ranges of 87.5 oz.
Calculate the population mean and population standard deviation.
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