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When the t distribution is used in constructing a confidence interval based on a sample size of less than 30, what assumption must be made about the shape of the underlying population?
Statistics and Probability, Statistics
Suppose that a fair, 6 sided die is rolled. Let X indicate the event that an odd number is rolled (in other words, X = 1 if an odd number is rolled and X = 0 otherwise). Let Y indicate the event that 2, 3, or 4 is rolled ...
If you want to be 95?% confident of estimating the population mean to within a sampling error of ±25 and the standard deviation is assumed to be 125?, what sample size is? required?
A researcher selects from a participant pool of 8 males and 11 females. He determines that the probability of selecting 2 female participants is p = .335. Based on this probability, what strategy did the researcher use t ...
The blenders produced by a company have a normally distributed life span with a mean of 8.2 years and a standard deviation of 1.3 years. What warranty should be provided so that the company is replacing at most 10% of th ...
Question 1 (CO6) From a random sample of 68 businesses, it is found that the mean time that employees spend on personal issues each week is 4.9 hours with a standard deviation of 0.35 hours. What is the 95% confidence in ...
When you purchased your? house, you took out a? 30-year annual-payment mortgage with an interest rate of 7% per year. The annual payment on the mortgage is 16,803. You have just made a payment and have now decided to pay ...
Thirty percent of the managers in a certain company have MBA degrees as well as professional training. Eighty percent of all managers in the firm have professional training. If a manager is randomly chosen and found to h ...
You must choose between investing in Stock A or Stock B. You have already used CAPM to calculate the rate of return you should expect to receive for each stock given each one's systematic risk and decided that the expect ...
Most graduate schools of business require applicants for admission to take the GMAT, the Graduate Management Admission Test. Scores on the GMAT are roughly normally distribute with a mean of 527 and a standard deviation ...
Doctoral assistant ships of Ph.D students 50% have paid assistant ships. a random sample of n=200 students is chosen.. based on this sample and using the properties of the binomial distribution, what is the approximate s ...
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