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It was reported that approximately 45% of all university professors are extroverted. Suppose you have classes with 6 different professors.
a) What is the probability that all 6 are extroverts?b) What is the probability that none of your professors are extroverts?c) What is the probability that at least 2 of your professors are extroverts?d) In a group of six professors selected at random, what is the expected number of extroverts? what is the standard deviation of the distributions?
Find out the least-squares regression line and interpret its slope.
For the first test, assume the data are from an independent-measures study using two separate samples.
What is the probability that exactly 5 nonconforming parts are produced during a 1-hour period? What is the probability that at least 5 nonconforming parts are produced during a 1-hour period?
How do question content and wording, response strategy, and preliminary analysis planning affect question construction? Provide examples of questions that were positively and negatively influenced by these elements.
If the researcher deems the data to be statistically significant, which of the following is true with respect to a conclusion reached?
Markets can be segmented by the following variables: geographic, demographic, social, or behavior. If you were to select a segmentation variable suited best for the motorcycle market, which variable would you select?
If we wanted to shorten the interval of the estimation of the true mean of Saturday sales to a width of $600 in total, what should the size of our sample be to achieve it?
If the gas mileages are normally distributed with a standard deviation of 2.1, find the probability that a car has a gas mileage of between 29.2 and 30.3 miles per gallon.
A University employment office wants to compare the time taken by graduates with 3 different majors to find their first jobs after graduation.
And a standard deviation of 10 inches. What is the probability that the mean annual precipitation during 25 randomly Picked years will be less than 109.8 inches?
Identify what you think is the best measure of variability to use for your example and explain why you believe it to be better than the others.
The time a cashier spends processing individual customer's order are independent random variables with mean 2.5 minute and standard deviation of 2.
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