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In a town there are on average 2.4 children in a family and a randomly chosen child has on averate 1.55 siblings. Determine the variance of the number of children in a randomly chosen family.
For the samples summarized below, test the hypothesis at ∞ =.05 that the two variances are equal. Variance Number of data values Sample 1 19 8 Sample 2 9 18
suppose that 65 of all adults regularly consume coffee 50 regularly consume carbonated soda and 75 regularly consume
One of the herpetologists fears that pollution might be affecting the natural growth of the pythons. Do you think this sample result is unusually small? Explain. Show work.
Suppose a single die is rolled once. You win $5 if a 1 or a 3 comes up, win $12 if a 5 comes up and lose $10 if a 2, 4, or 6 come up. What does the expected value tell you about the game?
what is the probability that a binomial random variable x having parameters n 500 and p 0.025 takes a value greater
a study of internet usage indicated a month average of 36 internet sessions per user from home. a random sample of 24
We are certain the the average difference in reaction times between the two light types for all golfers is between 0.27 and 7.13.
a national caterer determined that 87 of the people who sampled their food said that it was delicious. a random sample
In a hypothesis test for the population variance, the alternate hypothesis is the population variance doesnot equal 17.0. The significance level to be used is 0.05 and the sample size to be taken is 25. The tablevalue(s) to use from the chi-square di..
according to cnnusa today poll appox. 70 of americans believe the irs abuses its power. let x equal the number of
Assume half of the 200 passengers are men. What doorway height satisfies the condition that there is a 0.95 probability that this height is greater than the mean height of the 100 men?
Construct a 99 percent confidence interval for the true mean diameter of a nickel. (c) Discuss any assumptions that are needed. (d) What sample size would ensure an error of ± 0.0005 inches with 99 percent confidence?
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