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x - 3, 5, 2, 6, 5, 8
y - 70, 76, 91, 54, 84, 40
The following table number of absences (x) and the grade earned on the first exam (y) for a statistics class. The least squares regression line is the form y= bo + b1x. Compute the value of bo. That is, compute the intercept round your answer to two decimal places.
What about drawing a random sample only from cell phone exchanges? Discuss the advantages and disadvantages of such a sampling method compared with surveying randomly generated telephone numbers from non - cell phone exchanges.
Based on the results of the survey, could it be concluded that a majority (over 50%) of all University of California faculty members favor using these criteria? Explain.
How large a sample is needed to find the population mean within $250 at 99 percent confidence?
The problem relates to Basic Statistics and it is about computing the sales of ice cream flavors of chocolate, vanilla and strawberry. The problem is to determine the probability of selling an ice cream in cone with vanilla flavor
You have the option of spending $100 on a marketing campaign, which will definitely bring in all the donors you need (but you don't want to spend this money if you don't need it). Draw a decision tree describing the situation you're facing, calcula..
for your study on the food consumption habits of teenage males you randomly select 10 teenage males and ask each how
A certain brand of automobile tire has a mean span of 3500 miles and a standard deviation of 2000 miles. (assume the life spans of the tires have a bell-shaped distribution)
Personal phone calls received by a new employee was 3,5, and 6. assume that samples of size 2 are randomly selected with replacement from this population of three values. Find the mean of the distribution.
In the past HR uses an average of 25 vacation days per worker in order to make available man-hour and payroll predictions. Is there evidence to show that the number of vacation days decreased over the past year? Use alpha = .05
Consider a large population of families with three children each. If the genders of children in any family are independent of one another, the number of male children in any family will have a binomial distribution based on three trials.
Lungs and smoke. Suppose that 23% of adults smoke cigarettes. It's known that 57% of smokers and 13% of nonsmokers develop a certain lung condition by age 60.
Items are selected and tested in succession. Under the usual assumptions for Bernoulli trials, what is the probability the third satisfactory unit?
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