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Do male college students spend more time than female college students using a computer? This was one of the questions investigated by the authors of the paper "An Ecological Momentary Assessment of the Physical Activity and Sedentary Behaviour Patterns of University Students" (Heath Education Journal [2010]: 116-125). Each student in a random sample of 46 male students at a university in England and each student in a random sample of 38 female students from the same university kept a diary of how he or she spent time over a three-week period. For the sample of males, the mean time spent using a computer per day was 45.8 minutes and the standard deviation was 63.3 minutes. For the sample of females, the mean time spent using a computer was 39.4 minutes and the standard deviation was 57.3 minutes. Is there convincing evidence that the mean time male students at this university spend using a computer is greater than the mean time for female students? Test the appropriate hypotheses using α = 0.05
Based on this information which probability model would be a good candidate for the number of drive up customers per day? What is the mean and variance of this model?
A study of human body temperatures using healthy men showed a mean of 98.1°F and a standard deviation of 0.70°F.
In the game of roulette, a ball is dropped into a spinning wheel, finally landing on one of the wheel's 38 different slots. The wheel has 18 black slots, 18 red slots, 1 green zero, and 1 green double-zero. Suppose the wheel has landed on red 9 ti..
Use analysis of variance to test any differences in mean glue strengths.
A doctor is doing research on the effects of medicine in a patience body. He randomly selects 10 patients that have been given a medication and records the number of days that have passed since they have taken the drug and concentration of the dru..
A game involves selecting a card from a regular 52-card deck and tossing a coin. The coin is a fair coin and is equally likely to land on heads or tails.
it has been reported that 80 of all emails received is junk mail. each morning a computer user turns on his computer
company w is testing a sales software. their sales force of 500 people is divided into four regions northeast southeast
according to most estimates 10 of the people in the general population are left-handed and 90 are right-handed. a
What is the (a) Minimum number of doctors required so that at least 70% of the arriving patients can receive treatment immediately
Give the result printed by the interpreter, the corresponding box-and-pointer structure, and the interpretation of this as a tree (as in figure 2.6).
What are the hypotheses we would want to test for the Kleenex case?
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