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The following data show samples of three chain stores in three different locations in one town and the amount of dollars spent per customer per visit. At the 0.05 level, is there a difference in among the means?
Store A Store B Store C 30 42 30 14 28 14 22 20 20 18 35 16 26 49 15 25 28 3624
Consider a liter of 5 puppies (3 brown/2 black). Draw a probability tree indicating the probabilities for selecting 3 puppies without replacement? What is the probability that I will select 3 brown puppies? 1 brown and 2 black puppies? At least 1 ..
To investigate he selects a sample of eight weeks and determines the number of new cars sold and the number of sales people on duty for that week. a) What are the dependent and independent variables?
A salesman must select 2 of the first component and 3 of the second to take on a sales call. How many different systems can the salesman select?
State the direction of the alternative hypothesis used to test that the demand function is downward sloping. Type gt (greater than), ge (greater than or equal to), lt (less than), le (less than or equal to) or ne (not equal to) as appropriate in the ..
A University employment office wants to compare the time taken by graduates with 3 different majors to find their first jobs after graduation.
Compute a 95% confidence level for the difference in the means of the two treatment methods and select the best answer below. Assume that the independent random samples were taken from normal distribution.
Identify the null hypothesis, alternative hypothesis, test statistic, P-value and conclusion about the null hypothesis. Use the P-value method.
Their resting heart rates were measured. A partial ANOVA table is given.
The mean for a sample of n=16 scores has an expected value of 50. This sample was selected from a population with a mean of µ=50.
Description of data collection and analysis methods (how do you choose people for survey? Sampling plan or any others) Survey on according to the Australian market
a sample of data on daily prices of three petrol stations over a two week period have been collected in the table
After surveying 90 couples, they determined the mean of their sample to be $150 and the standard deviation was $5. What is the 95% confidence interval for the population mean?
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