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A sociology professor is interested in studying the mean number of hours,that a day student spends per week studying.This number is believed to be 18 hours .She thinks that wrong.The professor than randomly selects 400 day students and calculate that the sample mean numbers of hours spent on studying is 18.5 hours with s=4 is the sociology professor's claim valid at a a=5%
If a researcher decides to use multiple comparisons in a study with three conditions, what is the probability of a Type I error across these comparisons? Use the Bonferroni adjustment to determine the suggested alpha level.
How much money will be in the account at the end of that time period?
For women who are HIV-positive when they get pregnant, is there a relationship between whether or not the HIV is transmitted to the infant and the length of time the woman had been infected before getting pregnant?
In a class, the grade of a student on an exam is an RV with expectation 60 and variance 16. If the class average is between 55 and 65, with a probability greater than or equal to 0.9, determine the number of students that have taken the exam.
Several levels of file access were discussed in this chapter, including read/ write, read-only, execute-only, and no access.
Fold over the last column in the design of Table 6.8a and confirm that, on the usual assumptions concerning three-factor and higher order interactions
the wayne manufacturing company purchases a certain part from suppliers a b and c. suppler a supplies 65 of the parts b
As a counselor in the field of addiction, you are interested in researching if online gambling is becoming more prevalent. You decide to conduct research to compare online gambling to gambling in public places such as casinos.
Use Poisson approximations to investigate the following types of coincidences. The usual assumptions of the birthday problem apply, such as that there are 365.
How large of a sample is needed to estimate the mean of a normally distributed population of each of the? following?
objectives1. introduce some basic library search tools2. demonstrate the relevance of statistics in this case
Death during the next year for a person of your customer's age, sex,health etc is 0.002. What is the expected gain (amount of money made by the company) for policy of this type?
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