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To decide whether two different types of steel have the same true average fracture toughness values, n specimens of each type are tested, yielding the following results.
Calculate the P-value for the appropriate two-sample z test, assuming that the data was based on n = 100. (Round your answer to four decimal places.)
Calculate the P-value for the appropriate two-sample z test, assuming that the data was based on n = 500. (Round your answer to four decimal places.)
Is the small P-value for n = 500 indicative of a difference that has practical significance? Would you have been satisfied with just a report of the P-value? Comment briefly.
a new integrated computer system is to be installed worldwide for a major corporation. bids on this project are being
assume that team a beats team b in 75 of the nba games they play against each other they play normal nba games i.e. 4
A particular magazine typically has 65% subscription renewals. A new advertising campaign is introduced to see if this can be increased. To monitor renewals, a sample of 300 subscribers is taken each month to see what percentage renew their subscr..
An averageof 2 cars arrive at a highway tollgate every 10 seconds. If this rate is approximated by a Poisson process, what is the probability that exactly 3 cars will arrive in a 10-second period?
A sample of n=20 has a mean of M = 40. If the standard deviation is s=5, would a score of X= 55 be considered an extreme value? Why or why not?
so if you have a variance of 75 for a class average with a standard deviation of - 15. what grade will 96 of the class
a researcher wishes to estimate with 90 confidence the proportion of adults who have high speed internet access. her
Using the p- value approach, test the hypotheses at the 5% level of significance.
fifty people in the civilian labor force are randomly selected and the sample average age is computed to be 36.4.a find
You conduct a hypothesis test and you observe values for the sample mean and sample standard deviation when n=25 that do not lead to the rejection of the null hypothesis (the p value is .0667).
The difference between expected payoff under certainity and expected value of the best act without certainity is the expected:
in a study undertaken by catalyst 43 of women senior executives agreed or strongly agreed that a lack of role models
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