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A student conducted a survey of credit card usage by 25 of her friends. Each subject was asked how many times he or she used a credit card within the past seven days, and the results are listed as relative frequencies in the accompanying table.
X = 0 1 2 3 4
P(X)= .16 .24 .40 .16 .04
Find the mean, variance and standard deviation for the distribution.
consider a binomial random variable where the number of trials is 9 and the probability of success on each trial is
A drawer contains 11 identical red socks, and 8 identical black socks. Suppose that you choose 2 socks at random in the dark
explain what it means for two events to be mutually exclusive. give an example of two mutually exclusive events and two
consider steam at 1600 psia and 1200 fahrenheit. determine the specific volume by using the principle of corresponding
A random sample of 100 people was taken. Eighty of the people in the sample favored candidate A. The 95% confidence interval for the true proportion of people who favor Candidate A is?
Descriptive statistics for each of the four variables along with a discussion of what the descriptive statistics tell us about the motion picture industry?
In a two-sided hypothesis test to see if the average accounts receivable has changed, the best formulation of the null hypothesis is?
What is the minimum-cost order quantity for the shoes? What are the annual savings of your inventory policy over the policy currently being used by Keith?
Florida State University administers a mathematics placement test to students where they 1st enter the university.
The critical values are values of the test statistics that separate the rejection region from the non rejection region. Is this true? Explain answer.
hannah dakotas experiment obtained reaction time data using a factorial design with two independent variables. she
the information on seat belt usage by gender shown below. the proportions in the following table are based on a survey
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