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Question: 1. A weightlifter's maximum bench press (in pounds) in each of six successive weeks was
280, 295, 275, 305, 300, 290
Find the standard deviation.
2. For the values
20, 121, 132, 123, 145, 151, 119, 133, 134, 130
use the classic outlier detection rule to determine whether any outliers exist.
Also, the sample data appear to have a bell-shaped distribution. Construct the 95% confidence interval for the mean time spent on paperwork by all managers.
The Airline Quality Rating Study published by the U.S. Department of Transportation reported that in a recent year, Airtran led the nation in fewest occurrences
Of those customers using extra unleaded or premium gas, 60% fill their tanks. What is the probability that the next customer fills the tank?
A young man has 4 girlfriends A, B, C, D One night he wrote a love letter to each of the girls, and addressed 4 envelopes. But before he puts the letters in the correct envelopes, there is a power outage and he just puts the letters in the envelopes ..
Assume the population is normally distributed, the confidence level is 95%, n = 12, and σ is unknown.
How many treatment conditions were compared in the study? How many individuals participated in the study?
Without using formulas, explain the meaning of (a) expected value of a random variable; (b) actuarial fairness; and (c) variance of a random variable.
Twenty times they sold 6 cars, they never sold 7 cars, three times they sold 8 cars and one time they sold 9 cars. Find the probability that at most 4 cars were sold in a week.
in a research report on the effect of moisture on a certain kind of composite material it is reported that in 80 of
That is, what values of the tstat will give a one-sided p-value that is less than or equal to 0.05? What are the critical values for a two-tailed test at α = 0.05?
If the frequency of the trait has not changed, what's the probability he finds the trait in none of the 12 frogs?- at least 2 frogs?
What is the point estimate of the proportion of the population of employees who strongly dislike their current work experience (to 2 decimals)?
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