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A regression equation was fit to a set of data for which the correlation, r, between X and Y was 0.6. Which of the following must be true?i) The slope of the regression line is 0.6.ii) The regression model explains 60% of the variability in Y.iii) The regression model explains 36% of the variability in Y.iv) At least half of the residuals are smaller than 0.6 in absolute value.
As an aid for improving students' study habit, nine students were randomly selected to attend a seminar on the importance of education in life. The table shows the number of hours each student studied per week before and after the seminar.
Our customers expect a call to be completed in 22 minutes. Using the data above, does either of our call centers meet this expectation with an alpha level of 0.05?
the distribution of the sat scores in math for an incoming class of business students has mean of 580 and standard
a and b flip coins. a starts and continues flipping until a tail occurs at which point b starts flipping and continues
the average cost per square foot for the office rental space in the central business district of petaling jaya is
The mean lifetime of electric light bulbs produced by a company has in the past been 1120 hours with a standard deviation of 125 hours. A sample of 20 bulbs revealed a standard deviation in the lifetimes of 150 hours.
5000 light bulbs each with an average life of 500 hours, standard deviation is 100 hours. Find the percentage of bulbs that can be expected to last between 540 hours and 780 hours.
Primary healthcare workers believe that anaphylactic shock reaction to immunization injections occurs with children in one case in two thousand.
Mr.Smith works on a temporary basis. The mean length of each job he gets is three months. If the amount of time he spends between jobs is exponentially distributed with distributed with mean 2, then at what rate does Mr. Smith get new job?
A Russian SVR agent has 45 million dollars which he can spend to bribe academics, politicians, and bloggers to spread disinformation and to promote anti-American propaganda
Yet in the city as a whole, about 29%of the eligible jurors were women. Let p denote the probability that a juror drawn by the judge is a woman. Then to test the judge’s fairness in selecting women, what null hypothesis should be? What alternative hy..
Suppose that the risk of allergies for the children of nonsmokers is 0.15. What is the risk of allergies for the children of smokers?
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