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A new drug relieves nasal congestion in 90 percent of those with the condition. The new drug is administered to 300 patients with the condition. What is the probability that more than 265 will be relieved of nasal congestion?
Which of the following best explains how the F ratio examines differences among groups? A. The critical F is compared to the critical t.
This morning the office you are monitoring has eight office visits on the schedule. What is the probability that:
Is it reasonable to conclude that this set of n = 16 people is not a representative sample of registered voters?
Levels above 200 warrant attention. If 95 teenage boys are examined. How many would you expect to have cholesterol levels greater than 225.
In general how is the magnitude of the standard error of estimate related to the value of correlation?
What is the probability that the sample mean breaking strength of a random sample of 100 pieces of fabric is less than 1 .8 kg/mm?
In a sample of 14 of the bowling balls the sample standard deviation was found to be 0.52 pounds. Construct a 95% confidence interval for the variance of the bowling ball weight.
A sample of 81 observations is taken from a normal population. The sample mean is 40, and the sample standard deviation is 5. Determine the 95 percent confidence interval for the population mean.
How large a sample of one-bedroom apartments would be needed to estimate the mean within $20 with 90% confidence?
Assuming the population variances from both offices are equal, is there evidence of a difference in the mean waiting time between the two offices? Use α = 0.05
Attitude change is thought to result from the anxiety produced under conditions of cognitive dissonance. The data below represent the anxiety scores of subjects in a dissonance study.
The diameters of oranges in the certain orchard are normally distributed with the mean of 5.26 inches and a standard deviation of 0.50 inches.
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