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Comparing dexterity-test scores of workers on the day shift versus those on the night shift, the production manager of a large electronics plant finds that a sample of 37 workers from the day shift have an average score of 73.1, with a standard deviation of 12.3. For 42 workers from the night shift, the average score was 77.3, with a standard deviation of 8.4. Assuming the population standard deviations are equal, use the 0.05 level of significance in comparing the average scores for the two upon approaching the front desk. In particular, she is concerned that desk staff might be providing female guests with less prompt service than their male counter- parts. In observing a sample of 34 male guests, she finds it takes an average of 15.2 seconds, with a standard deviation of 5.9 seconds, for them to be greeted after their arrival at the front desk. For a sample of 39 female guests, the mean and standard deviation are 17.4 seconds and 6.4 seconds, respectively. Assuming the population standard deviations to be equal, use the 0.05 level of significance in examining whether the population mean time for serving female guests might actually be no greater than that for serving male guests. Using the appropriate statistical table, what is the most accurate statement we can make about the p-value for the test?
Find the slope and vertical axis intercept of the linear function
I have a lower spec limit of -0.008 and an uppers spec limit of 0.008. The mean of the data is -0.00306 and standard deviation is 0.003642. What is the z-score and DPMO
question a pair of dice is rolled. the sum of the faces on top is observed. what are the expectation variance and
testing for population mean.bookstores like education one reason being that educated people are more likely to spend
a recreational club has 15 members. 9 of the club members are men and 6 are women. show all work1. in how many ways can
the observer-participant relationship is an important consideration in the design of observation studies. what kind of
a random sample of 20 items is selected from a population. to determine the appropriate critical t-value what number
suppose you want to test the claim that u is gt or to 65.4. given a sample size of n 35 a level of significance of a
what is the probability that a random point selected in the interval 04 will be an integer?what is the probability that
The Absent Minded Professor study was a RCT, which had an objective to estimate the protective effect of drug "No-Reminder" compared to drug "Reminder" on risk of "Forgetful syndrome". The study found that the drug "No-Reminder" was protective.
the portion of people aged 18 - 25 who currently use illicit drugs is equal to 0.20 or 20.now express the null
the contents of bottles of beer are normally distributed with a mean of ? and a standard deviation of ? 5ml.what is
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