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In a study it was found that the average age of cable TV shoppers was 48 years. Suppose you want to test the null hypothesis, H0: μ=48, using a sample of n=70 cable shoppers
a. Find the p-value of a two-tailed test if x=49.1 and s=6.8b. Find the p-value of a an upper-tailed test if x=49.1 and s=6.8
A psychologist is investigating the hypothesis that children who grow up as the only child in the household develop different personality characteristics than those who grow up in larger families.
A national survey is conducted to assess the association between hypertension and stroke in persons over 55 years of age. Compute the incidence of stroke in persons over 55 years of age
It is believed that population standard deviation is 15 days. If test is conducted using 0.05 level of significance, what conclusion must be reached?
If you are performing a hypothesis test using a z statistic in which you sampled 50 people and found an average SAT verbal score of 542 (assume we know the population mean to be 500 and the standard deviation to be 100)
Graph the information using a histogram and a scatter plot in Excel as well. How does seeing the information in a graphical format provide more information?
A manufacturer claims that the mean lifetime, mu, of its light bulbs is 44 months. The standard deviation of these lifetimes is 7 months. Seventy bulbs are selected at random, and their mean lifetime is found to be 43 months.
Due to financial hardship, the Nyke shoe company feels they only need to make one size of shoes, regardless of gender or height. They have collected data on gender, shoe size, and height
If a filled container of juice is selected at random, what is the probability that it is a nonconforming container? If a filled container of juice is selected at random, what is the probability that it was filled on machine II?
If probability of drawing a face card is 0.625. Determine the probability of not drawing a face card.
A person claims to have ESP (extrasensory perception). A coin is tossed 16 times, and each time the person is asked to predict in advance whether the coin will land heads or tails.
The standard deviation of the population is 1 at a-0.05, is the number of sticks of gum a person chews per day actually greater that 8?
Discuss the following questions: Of what use is intervention and prevention for this population? What needs to be done in the American justice system to combat crimes committed by the group you have chosen to study?
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