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The addition of a new accelerator is claimed to decrease the drying time of latex paint by more than 4%. Several test samples were conducted with the following percentage decrease in drying time. Assume that the percentage decrease in drying time is normally distributed.
5.4 6.6 3.7 6.0 3.1 2.0 2.7 4.2
(a) Find the 95% confidence interval for the true mean decrease in the drying time based on this sample. (Give your answers correct to two decimal places.)
A family has 5 children and 1 of them is a boy...the percentage of boy is 1/5, or .020. Do you think one could say the chances of any woman having a boy would be 1/5? Explain your answer.
hypothesis test for two factors anova.nbspnbspnbspnbspnbspnbsp a mail order catalogue company operates with three
The results for college x was a mean of 5 hours and an estimated population variance of 2 hours: for college y, m= 4, s 2 =1.5; and for college Z, M= 6, s 2 =2.5 what should you conclude? Use the .5 level.
For the first five troubles reported on a given day, what is the probability that: Fewer than two troubles will be repaired on the same day?
Using substitution in one of the standard Taylor series, find the Taylor series about f for 0. Give all terms up to the term in x^3.
suppose the goodyear tire company developed two new brands of tires and would like to compare the variability of the
Set up a 99% confidence interval estimate of the true population mean amount of glue contained in a 2-litre can. On the basis of your results, do you think that the quality control analyst has a right to complain to the manufacturer?
Quality control engineer has been checking output by almost continuous sampling as abnormal condition began. Determine the probability that in sample of 10 pieces.
Given that a respondent is over age 50, what is the probability that he or she gets news primarily from newspapers?
How do we use a least squares regression line? What is the range for the coefficient of determination?
suppose we want to determine the binomial probabilityp of getting 3 heads in 13 flips of a 2-sided coin. what values of
An industrial chemical to retard the spread of fire in paint has been developed. From past experience, 48% of sales calls will result in an order.
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