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In a certain city, 30% of the families have a MasterCard, 20% have an American Express card, and 25% have a Visa card. Eight percent of the families have both a MasterCard and an American Express card. Twelve percent have both a Visa card and a MasterCard. Six percent have both an American Express card and a Visa card.
a. What is the probability of selecting a family that has either a Visa card or an American Express card?
b. If a family has a MasterCard, what is the probability that it has a Visa card?
c. If a family has a Visa card, what is the probability that it has a MasterCard?
d. Is possession of a Visa card independent of possession of a MasterCard? Why or why not?
e. Is possession of an American Express card mutually exclusive of possession of a Visa card?
The board of directors of Saner Automatic Door Company consists of 12 members, 3 of whom are women.
When you have a factorial ANOVA and the interaction effect is significant, does the researcher give much attention to any significant main effects when interpreting the results of the study?
At the 5% significance level, can the researcher reject the hypothesis that the mean reading scores of all children in the three school systems is the same ? Formulate and test the appropriate hypotheses. Use the critical value approach.
Estimate the percentage who weigh more than 180 pounds? Assume that we want 96% confidence that the error is no more than 1.5 percentage points.
Given the following data on the number of pints of ice cream sod at a local ice cream store for a 6 period time frame.
The mean time to expose a single panel in a circuit-board plant is two minutes with a standard deviation of 1.5 minutes. What is the natural coefficient of variation?
Type the above data into the SPSS Data Editor window, or save this file as an unformatted text file and write SPSS syntax to read it in.
A study is conducted to determine if time of day has any effect on test grades. An introductory psychology class is selected for the study, because it has a standard curriculum taught across many sections. Two classes are selected for each time perio..
The university policy department must write, on average, five tickets per day to keep department revenues at budgeted levels. Suppose the number of tickets written per day follows a Poisson distribution with mean of 6.5 tickets per day. Interpret ..
If 15 subjects take a pre-test and a post-test with a mean change score of 1.5, and if the standard deviation of the comparison distribution is calculated to be .5, what is the t score?
A management trainee is selected at random. What is the probability that the person selected is a female who did not attend college?
In a poll of 150 randomly selected adults 78 said they favored a new proposition. compute a 95% confidence interval for the proportion of all adults in favor of the proposition at the time of the poll.
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