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Question: A computer generates 100 random numbers, and 100 people whose names correspond with the numbers on the list are chosen.
Use the following information to answer the next seven exercises: Studies are often done by pharmaceutical companies to determine the effectiveness of a treatment program. Suppose that a new AIDS antibody drug is currently under study. It is given to patients once the AIDS symptoms have revealed themselves. Of interest is the average (mean) length of time in months patients live once starting the treatment. Two researchers each follow a different set of 40 AIDS patients from the start of treatment until their deaths. The following data (in months) are collected.
Researcher A: 3; 4; 11; 15; 16; 17; 22; 44; 37; 16; 14; 24; 25; 15; 26; 27; 33; 29; 35; 44; 13; 21; 22; 10; 12; 8; 40; 32; 26; 27; 31; 34; 29; 17; 8; 24; 18; 47; 33; 34
Researcher B: 3; 14; 11; 5; 16; 17; 28; 41; 31; 18; 14; 14; 26; 25; 21; 22; 31; 2; 35; 44; 23; 21; 21; 16; 12; 18; 41; 22; 16; 25; 33; 34; 29; 13; 18; 24; 23; 42; 33; 29
Investigate the comparative pros and cons of the mean and the median. Find examples where the mean is more appropriate than the median and vice-versa. Discuss the locations of the mean, median and mode for a normal, left-skewed and right-skewed di..
y -8 -4xa. find the y-intercept and slopeb. determine weather the line slopes upward slopes downward or is horizontal
Consider the events A1 5 an ace is selected on the first draw; A2 5 an ace is selected on the second draw.- Find P(A2 | A1) and P(A2). Are the events A1 and A2 independent? Justify your answer.
15 pieces are selected at random for inspection. What is the probability of exactly 4 defective pieces being found in the sample?
Some of the methods in this section are approximations rather than exact probability results. We have given rules of thumb for safe use of these approximations.
Is it necessary to assume a normal distribution on the population to estimate the value of the mean spending per day? Explain.
Because of the difficulty of weighing a bear in the woods, researchers caught and measured 54 bears, recording their weight, neck size, length, and sex. They hoped to find a way to estimate weight from the other, more easily determined quantities.
the average selling price of blackberry smart phones purchased by a random sample of 35 customers in 2010 was 311.
Each year the local country club sponsors a tennis tournament. Play starts with 128 participants. During each round, half of the players are eliminated.
Discuss the ways that you are going to incorporate the Transferable Skills into your work within your chosen career field. Explain how the Transferable Skills will affect future career goals.
If the salesperson wants to be at least 90% confident of getting at least 4 orders, at least how many demonstrations should she make?
jacks game preserve is stocked with 30 moose 25 elk and 45 deer. five years later a sample of animals yields 90 moose
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