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In a poll of 150 randomly selected adults 78 said they favored a new proposition. compute a 95% confidence interval for the proportion of all adults in favor of the proposition at the time of the poll.
A. What is the lower limit of the 95% confidence interval?
B. What is the upper limit of the 95% confidence interval?
Assume it is known that the distribution of purchase amounts by customers entering a popular retail store is approximately normal with mean $25 and standard deviation $8.
At alpha = 0.05, is there enough evidence to conclude that proportions vary from those in the study?
If X=85 (sample mean), 8 is population standard deviation, and n=64 is sample size, construct a confidence interval estimate for the population mean.
The National Survey of Student Engagement (NSSE) surveys freshmen and seniors about their level of engagement in campus and classroom activities that enhance learning.
What is the weighted mean profit per delivery - a bottling company offers three kinds of delivery service - instant, same day and within 5 days.
Evaluate probabilities using the laws of probability, the standard normal distribution, t-distribution, or X2-distribution.
When combining probabilities, to find the probability of one event AND another event, the separate probabilities should be
The mean return for a random sample of 33 mutual funds is 14.93 percent with a standard deviation of 9.57. Build a 95 percent confidence interval for mu, population mean.
What is the probability an applicant does not pass the test and is a sucessful manager?
Use either Linear Programming module or Transportation module of Cd to minimize the shipping costs involved in move.
Find the probability between the given values for normal distribution.
Would Kruskal-Wallis be the suitable statistical procedure to test this Research Question (RQ)? Describe your answer. When would you use Chi-Square test rather than One-Way Anova?
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