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The sample mean of the sampling distribution of a statistic is 6 and the standard error of the statistic is 1.03. What is the probability that xbar > 7.52?
a) 0.109
b) 0.039
c) 0.119
d) 0.069
e) 0.079
How many subsets of S contain either the number 6 or the number 15?
Suppose that this is a simple random sample of adult residents of Maine.
Calculate the MEAN and STANDARD DEVIATION for the distribution below:
We are interested in comparing the proportions of males and females who think earning a large salary is very important to them. I surveyed 200 of each gender and recorded their answers to the question as yes or no.
A 95% confidence interval for the proportion of all adults who bought a lottery ticket in the past year is (assume Gallup used an SRS)
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Find the value of q-hat from proportion and degrees of freedom used to find the t-score.
Compute mean absolute percentage error (MAPE) of the forecasts.
Let z represent the standard normal variable and suppose a value is randomly selected. Find each of the following probabilities by:
We recalculated our comparison of ideal number of children, this time only for women, separating them into two groups, those who indicated that they were "very happy" or "not at all happy" with life.
Find out the probability that temperature of oven will range from 460 to 470 F?
Construct a grouped frequency distribution using six classes.
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