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Arbitron Media Research Inc, conducted a study of the radio listening habits of men and women. One facet of the study involved the mean listening time. It was discovered that the mean listening time for men was 35 minutes per day. The standard deviation of the sample was 10 men studied was 10 minutes per day. The mean listening time for the 12 women study was also 35 minutes, but the standard deviation of the sample was 12 minutes. At the .10 significant level, can we conclude that there is a difference in the variation in the listening times between men and women?
You are a realtor with a small business. You use a simple 2 variable linear regression analysis for quick first glance house price estimates using square footage of the house.
At significance levels of .05 and .01 test H 0 : the factors A and B are independent.
The time between arrivals of cars at the Petroco Service Station is defined by thw following probability distribution.
The speed with which utility companies can resolve problems is very important. GTC, the Georgetown Telephone Company, reports they can resolve customer problems the same day they are reported in 70 percent of the cases.
Why do you use the chi-square statistic? What type of data is used with chi square analysis?
Can we conclude that the mean time for a game is less than 3.50 hours? Use the .05 significance level.
A particular medical operation proves fatal in 1% of the cases. Find an approximation to the probability that there will be at least 2 fatalities in 200 operations.
At the .10 significance level you will test to determine if there has been an increase in selling time. What is your decision?
Given: You are using a significance level of α = 0.05 to test a claim that p > 0.5. Your sample is a simple random sample of size n = 49. Calculate β for the test, assuming that the true population proportion is 0.7 and showing all work.
The calculated Z test statistic is a positive value that leads to a p-value of .045 for the test. If the significance level (α) is .01, the null hypothesis would be rejected.
In a poll of 1,004 adults, 93% indicated that restaurants and bars should refuse service to patrons who have had too much to drink. Construct the 90% confidence interval for the proportion of all adults who feel the identical way.
A minority representation group accuses a major bank of racial discrimination in its recent hires for financial analysts. Exactly 10% of all applications were from minority members, and exactly 8% of the 900 open positions were filled by members o..
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