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A hypothesis test is to be used to help determine if there is a difference between the proportion of 2 year college students and private university students that work at least 20 hours per week. Give the test value if a recent survey reported that in a sample of 300 student who attended two year colleges, 105 work at least 20 hours a week and a sample of 225 students attending private universities only 20 students work at least 20 hours per week.
Can we conclude at the 5% significance level that the population mean weight of athletic men is lower than the population mean weight of non-athletic men?
The study does provide sufficient evidence to support the claim that less than 75% of college student spend less than $250 per semester on textbooks.
Give null and alternative hypotheses for this test in symbolic form.
Following data from an x bar chart, is the process capable (capability index>1.33)?
Consider a hypothesis test that uses a 0.05 significance level to test the claim that the mean body tem of the population is less than 98.6
a) Do a test to see if workers attitudes on this matter have changed using a 90% alpha. b) Explain to management what your findings are and what this suggests about future decisions vs work options.
You have been asked to test whether data support company's claim? Test at α = 0.05. Suppose normality.
Use the binomial distribution formula to calculate the probability that:
If employee is chosen at random, determine the probability that employee is female and salaried staff? Choose the best answer from the following.
The p-value for a test statistic is .085, what is the minimum level of significance required to reject the null hypothesis?
Setup the alternative hypothesis that will test the claim that the percentage of women preferring white wine is 25% higher than men.
How to calculate the trimmed mean for each sample by deleting the smallest and largest observation and then corresponding trimming percent ages.
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