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Picking melons
Two stores sell watermelons. At the first store, the melons weigh an average of 22 pounds, with a standard deviation of 2.5 pounds. At the second store, the melons are smaller, with a mean of 18 pounds and a stan-dard deviation of 2 pounds. You select a melon at random at each store.
a) What's the mean difference in weights of the melons?
b) What's the standard deviation of the difference in weights?
c) If a Normal model can be used to describe the difference in weights, what's the probability that the melon you got at the first store is heavier?
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Q1. A prison psychologist recorded the number of rule infractions for 15 prison inmates over a six-month period to be 5, 4, 2, 4, 3, 5, 2, 0, 4, 4, 5, 5, 3, 4, and 3. a. Make a frequency table. b. Make a histogram based on the frequency table.
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Obtained first quartile = 47 third quartile = 70 standard deviation = 8 range = 58 mean = 58 median = 63 mode = 56 midrange = 63. what was the highest score earned.
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Do the results differ from the standard two-sample t test with pooled variance? Are the p-values similar?
a 95 confidence interval for the proportion of women that have ever dozed off while driving is 0.07 to 0.14. for men
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Determine the largest plausible average balance for the accounts of those using her managed fund in which you could have 90% confidence.
Perform an appropriate hypothesis test, showing the necessary calculations and/or explaining the process used to obtain the results.
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