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A box of Teddy Grahams chocolate cookies is supposed to weigh 250 grams. There is some variation in weight from box to box. The box contents are Normally distributed with an unknown mean and a known standard deviation of 3 grams. A consumer agency wishes to conduct a 5% significance test to test whether the mean weights differ from 250 grams. A random sample of size 8 is selected. What is the power of the test when the alternative is μ = 245?
test the claim that the mean gpa of night students is smaller than the mean gpa of day students at the .05 significance
A standard deviation of 12. If the data for both tests are normally distributed, on which test did the student score better relative to the other students in each class?
The average value observed was 1.2 mg. If the sample variance is 0.04 mg, compute a 99% confidence interval for the mean nicotine content.
After an unusually dry autumn, a radio announcer is heard to say, "Watch out! We'll pay for these sunny days later on this winter." Explain what he's trying to say, and comment on the validity of his reasoning.
If they didn't launch new mixing plant another alternate can contribute twenty five million profit for the same period (i.e. estimated 6 years). Draw the complete decision tree and determine whether the product should be launched or not.
Assume that a 2005 poll of 1000 American voters found that 76% of Republicans favored ending the tax on dividend income, as did 42% of Democrats and 54% of Independents.
How many participants would be required to ensure that a 95% confidence interval for the mean difference in the number of drinks is within two drinks of the true mean? Assumed that the standard deviation of the difference in the mean number of dri..
In a capture- recapture survey, 10,000 salmon were released after marking by inserting small wires. When 6000 fish from the population were subsequently caught, 400 of the wire tags were discovered by running the fish through a metal detection dev..
researchers studied the effects of adding an exercise program to dieting in the achievement of weight loss. a sample of
there are 7 seniors and 3 juniors in the statistics club and a team of 5 will be randomly selected to attend the joint
question 1. tawny frogmouth home range use in melbourne.a recent study examined the home ranges of tawny frogmouths in
How to collect and interpret data.
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