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Question: A large department store examined a sample of the 18 credit card sales and recorded the amounts charged for each of three types of credit cards: MasterCard, Visa and Discover. Six MasterCard sales, seven Visa and five Discover sales were recorded. The store used ANOVA to test if the mean sales for each credit card were equal. What are the degrees of freedom for the F statistic?
For a sample of 12 items from a normally distributed population for which the standard deviation is s=17.0, the sample mean is 230.8. At the 0.05 level of significance
Interpret the results. Is it possible that, for these populations of days, the average number of calls completed between plumber A and plumber B do not differ?
a random sample of size 36 is selected from a population whose mean is 70 and standard deviation is 6. calculate the
If 2 circuit boards are selected at random without replacing the first, what is the probability both circuit boards are defective?
How large should n be so that the standard deviation of is no more than 0.01 and sampling distribution
Quaker Oats is contemplating changing the shape of its box from the quaint cylinder presently in use. Different random samples were selected from five stores of similar size in the same region
There're several advantages of using a paired t-test. Since the same subjects are being tested in each of the varying conditions, those subjects serve as their own control.
Write the example of statistics in news to explain the following statement which represents one of the objectives of statistics analysis: "Statistics assists us make decisions.
Choose a construct you would like to measure. Create an operational definition of your construct using at least three peer-reviewed journal articles as references.
Explanation on what is the logic behind using the sum of the products of deviation scores as the numerator of the formula for the correlation coefficient?
Explain the difference between a discrete and a continuous random variable. Give two examples of each type of random variable.
a national grocers magazine reports the typical shopper spends six minutes in line waiting to check out. a sample of 16
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