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If the t ratio for the slope of a simple linear regression equation is equal to 1.614 and the critical value of the t distribution at the 1% and 5% levels of significance, respectively, are 3.499 and 2.365 is the slope:
not significantly different from zero
significantly different from zero at both the 1% and 5% levels
signifcantly different fro zero at the 1% level but not at the 5% level
significantly different from zero at the 5% level but not at the 1% level.
The rejection region for a two-tail test that uses the standard normal distribution is that area under the distribution lying
The results of the simple linear regression are provided below.
We are interested in testing to see if the variance of a population is less than 7. The correct null hypothesis is:
compute the expected value and variance of U.Determine Expected value and variance using uniform distribution.
Determine the following probabilities: Events A and B are mutually exclusive events defined on common sample space.
Eighty-eight shoppers were interviewed at random, and 59 said that they prefer to shop alone.
To find the 95 percent confidence interval for the true population mean. From the results below, is it true that 95% of the sample means will fall
Suppose that the lives of all such bulbs have a normal distribution with a mean of 750 hours and a standard deviation of 55 hours. Let x (sample mean) be the mean life of range sample of 25 such bulbs.
In a study about postage tariffs and revenue, the European Economic Community wanted to look at the relationship between the number of postal employees in a country and the amount of domestic mail that was processed. They collected data for six di..
A new restaurant with 123 seats is being planned. Studies show that 57% of the customers demand a smoke free area. How many seats sould be in the non-smoking area in order to be very sure (mean + 3 Standard Deviation) of having enough seating ther..
Compute cumulative probabilities for these numbers in second column. Then create a histogram illustrating data distribution. Using generated Normal probability table, determine probability of Pr(X
Calculate an 85% confidence interval for the population mean number of wolf pups per den at southwestern United States (US).
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