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Question: Credit card companies will often call cardholders if the pattern of use indicates that the card might have been stolen. Let's say that you charge an average of $280 a month on your credit card, with a standard deviation of $75. The credit card company will call you anytime your purchases for the month exceed the 98th percentile. What is the dollar amount beyond which you'll get a call from your credit card company?
Compute the correlation coefficient and interpret it. Compute the mean square error MSE. Compute the standard error of the estimate. Compute the estimated standard deviation of b1.
A 95% confidence interval is not so much a statement about any particular interval, such as (79.3, 80.7), but pertains to what would happen if a very large number of like intervals were to be constructed. How are confidence intervals calculated
A university found that 20 percent of its students withdraw without completing the introductory statistics course. 20 students registered for a section of the course this term.
to compute the variance what should one do?a. square the standard deviation.b. take the square root of the standard
Formulate the hypotheses to determine whether or not the lathe is in perfect adjustment. Compute the test statistic.
Compute the test statistic for the goodness of fit test. At 95% confidence using the p-value approach, test the hypotheses. What do you conclude about the distribution?
According to the norms established for a reading comprehension test, eighth graders should average 84.3 with a standard deviation of 8.6. If 45 randomly selected eighth graders from a certain school district averaged 87.8, use the four steps in th..
Describe the sampling distribution for the statistic of interest in each of the given stories, including numerical values for the mean and standard deviation of the sampling distribution.
a two-variable data set has a correlation coefficient of 0.84. what is the coefficient of determination?a. 0.9165b.
a pet supplier has a stock at parakeets of which 10 are blue parakeets. a pet store orders 3 parakeets from this
Determine the fugacity and fugacity coefficient of propane using the following approximations the Lewis fugacity rule.
What is the probability of under running the POE?
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