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Some of the stages of the Tour de France bicycling championships are over 200 km. In a random sample of 22 riders on Stage 4 of the 2012 Tour de France, Abbeville to Rouen, 214.5 km, times were measured (in minutes), and the sample variance was 4.81 minutes. Assuming normality, find a 99% confidence interval for the true population variance in times for Stage 4 of the Tour de France.
Variable X is normally distributed with a mean of 25 and a standard deviation of 5. What is the probability of randomly choosing someone with a score of 15 or less ?
If 20 voters are selected at random, and X is the number of voters which support this referendum, determine the mean and variance of X.
Calculate the p- value and use it to test H0 versus H a at each of a .10, .05, .01, and .001. d How much evidence is there that the mean composite satisfaction rating exceeds 42?
a manufacturer has designed a process to produce pipes that are 10 feet long. the distribution of the pipe length
the runoff in the westfield river near springfield ma for 15 months is as followsyearflow million gallons per
a manufacturer of semiconductors has a 10 defect rate in the semiconductors produced. every hour fifteen
Determine: SS(xy)Linear correlation coefficient, r. Bar graph below compares mean time in seconds for 7-yr old girls to complete certain task.
Sketch a standard Normal curve and mark this value of z on it. Find the P-value and shade the appropriate areas under the curve to illustrate your calculations.
question the temperature in january is estimated to have a mean of 34 and a standard deviation of 6 in degrees
Compute the probability that this chip is red. Relative to the hypothesis that the chip is red, find the conditional probability that it is drawn aom bowl II.
angioplasty is a medical procedure in which an obstructed blood vessesl is widened. in some cases a wire mesh tube
Calculate power of test if researcher uses a sample of n = 16 individuals.
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