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Question: As a sample size approaches infinity, how does the student's t distribution compare to the normal z distribution? When a researcher draws a sample from a normal distribution, what can one conclude about the sample distribution? Explain.
Assume each lifetime is independent. Round your answer to four decimal places (e.g. 98.7654). What is the probability that the lathe will operate at least seven years?
Given a binomial distribution with n=29 and p=0.83, would the normal distribution provide a reasonable approximation? Why or why not.
Welcome a woman taking the initiative in asking for a date. What is the probability that seven (7) of the men say NO.
Conclude the finite population, correction factor.With the population size of 1,000 and a planned sample size of 200, what is the finite population, correction.
Develop a regression model that would predict the DJIA based on the S&P 500 index. Based on this model, what would you expect the DJIA to be when the S&P is 1,100? What is the correlation coefficient (r) between the twomarkets?
for each individual the probability that they will pass the proficiency exam independant of their classmates is .99.
The diameters of grapefruits in certain orchard are normally distributed with mean of 6.95 inches and a standard deviation of 0.75 inches. Show all work.
Advertising coefficient is 200 and t stat is 1.75. Which of the following statements is an accurate interpretation of the situation when using an alpha of .10
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..
A manufacturer claims that the mean lifetime, mean, of its light bulbs is 52 months. The standard deviation of these lifetimes is 7 months. Ninety bulbs are selected at random, and their mean lifetime is found to be 55 months.
For a regional survey of suburban households to obtain data on television viewing habits, a statistical sample of suburban areas is first selected. Within the chosen areas, statistical samples of whole blocks are selected; and within the selected..
The KW water is provided to approximately 750,000 people, who are served through more than 362,000 accounts. All accounts are metered and billed monthly.
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