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Pretend you want to determine whether the mean weekly sales of soup are the same when the soup is the featured item and when it is a normal item on the menu. When it is the featured item the sample mean is 15 and the population standard deviation is 3 with a sample size of 27. When it is a normal item the sample mean is 10 with a population standard deviation of 6 and a sample size of 6. You want to use an alpha of .0214. Given this information we could use a Z test for two independent means and conclude that indeed the sales are different when the soup is a featured item.
A. True
B. False
The national average SAT score (for Verbal and Math) is 1028. Suppose that nothing is known about the shape of the distribution and that the standard deviation is 100. If a random sample of 200 scores were selected and the sample mean were calcula..
The director of Heating and Oil at Mitchell Brothers Company is concerned about the high cost of home heating oil being offered to their customers for the upcoming Fall season in Boston, MA. The company has no possibility of modifying the oil pri..
What is the p-value associated with the sample results? What is your conclusion based on the p- value?
Critically discuss the purpose of developing a frequency distribution? What is the relationship between the relative frequency and the cumulative frequency? Could a frequency distribution contain qualitative data? Why?
The sample standard deviation of the first set of strengths was 8.2 ksi, the second set's S value was 9.8 ksi, and the S value for the 25 differences in strengths was 3.3 ksi.
To be from the same population? You may assume the that follows a normal distribution. values are: 2.13 1.31 1.91 1.92 1.77 1.64 2.29 1.99 2.33 2.49 2.22
Among coffee drinkers, men drink a mean of 3.2 cups per day with a standard deviation of 0.8 cups. assume the number of coffee drinks per day follows a normal distribution.
Construct a 96 percent confidence interval for the mean weight of all firefighters six months after the exercise rooms were installed.
At the 0.05 level of significance, is there evidence to suggest that the population mean waiting time to check out is less than 10.73 minutes?
Conduct the hypothesis test and compute the p-value. At a 0.05 level of significance, what is your conclusion?
As a test the truck company purchases a random sample of metal parts from Steel-R-Us, and then determines if these parts were delivered on-time. Which hypotheses should they test?
You're given that the forecast for the current period of 70 turned out to be 6 units less than the actual demand. The forecast for the next period is 75.8.
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