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A simple random sample of 60 items resulted in a sample mean of 90. The population standard deviation is 12.
a. Compute the 95% confidence interval for the population mean (to 1 decimal).
b. Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean (to 2 decimals).
c. What is the effect of a larger sample size on the margin of error?
Find the probability that the number of who consider themselves basketball fans is :
Using ANOVA, determine if there is a significant difference in the six year graduation rate by type.
Marentette and El-Masri (2011) used logistic regression to identify predictors of obtaining seasonal influenza vaccination among hospital-based nurses in Canada. Their results are shown in table 1:
What is your conclusion? Are the two variables independent?
FINRA is considering three alternatives for providing food services (breakfast and lunch) to its employees: creating a company owned food service and hiring its own staff, hiring an outside vendor to provide food services (outsourcing), or a combi..
What is the probability that they all hit the target?
If probability of drawing a face card is 0.625. Determine the probability of not drawing a face card.
The number of passengers on the Carnival Sensation during one-week cruises in the Caribbean follows the normal distribution.
For each of following data sets, select the most suitable response from choices below the table. A strong negative linear relation exists.
If he selects the three brands at random, what is the probability that he will select the following?
Assume you are using ANOVA to study some phenomenon. There are three treatment levels and a total of 17 people in the study. Complete the following ANOVA table.
Assume the population standard deviation is 1.2 hours. The standard error of the mean is:
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