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In Gallup polls taken at different times, subjects were asked if they owned a gun, and the number of yes responses was recorded for each time period. Is this discrete or continuous? why?
Place a 95% confidence interval about the population mean number of down hours per month.
2 laptops are chosen at random without replacement, what is the probability that both are high priced?
A researcher wanted to invetigate whether there is a significant difference in the average age of instructors, assistant professors, assocated professors and full professors at a university. The faculty was selected at random and their ages were r..
Finding the probability of sample and describe the sampling distribution of the sample means.
Write all the possible samples of size 2 and calculate the average or median of each one.
State the Null Hypothesis and the Alternative Hypothesis. Determine the test statistic. Determine the P-value
The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures the motivation, attitude, and study habits of college students.
Additionally, student should use graphing function to graph data and calculate regression equation.
Compute Cronbach's alpha on the scale provided on pp. 710-711 of the Field text using the SAQ.sav file.
A manufacturer claims that the mean lifetime,M , of its light bulbs is 51 months. The standard deviation of these lifetimes is 9 months. Ninety bulbs are selected at random, and their mean lifetime is found to be 53 months.
Compute mean, standard deviation, coefficient of variation and 5 key percentiles for these data.
The sample mean of the accounts is found to be y-bar = $94.22, and the sample variance is equal to $455.21. Estimate mu and place a bound on the error of estimation.
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