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Using the Internet to find a place to live. A poll of 1500 college students asked whether or not they had used the Internet to find a place to live sometime within the past year. There were 825 students who answered "Yes." The other 675 answered "No."
(a) What is n?
(b) Choose one of the two possible outcomes to define the random variable, X. Give a reason for your choice.
(c) What is the value of X?
In studies for a medication, 13 percent of patients gain weight as a side effect. suppose 514 patients are randomly selected. Use the normal approximations to the binomial to approximate probability that
use the normal approximation to the binomial to determine what is the probability that: 100 or more murder are committed with a firearm? a. 0.452 b. 0.548 c. 0.367 d. 0.164.
Suppose that N takes the values 0, 1, 2, 3 with probabilities 0.4, 0.3, 0.2, 0.1 respectively. Find the probability that S = 30. Find E[(S - 15)+], given that E(X) = 20.
in the mid-eighties the toro company launched a promotion in which snow blower purchasers could refund a portion of
The mean serum cholesterol level of 25 men ages 65-74 is 231, with a sample standard deviation of 50. For 25 women of the same age, the mean serum cholesterol level is 255 with a standard deviation of 49. Are the average serum cholesterol levels stat..
Tell which measures are resistant to outliers and which are NOT resistant to outliers from the following list, and explain WHY or WHY NOT for each measure: Mean, median, Quartiles, correlation, and standard deviation.
there are three traffic lights between your house and a friends house. as you arrive at each light it may be red r
The standard deviation of the sample was 6.2 weeks. Construct a 95 percent confidence interval for the population mean. Is it reasonable that the population mean is 28 weeks?
what does it mean to say that your score on test one in statistics was in the 90th percentile?
Assume that the regression equation for the relationship between SAT scores and IQ scores is y = 9 +.105x. What would you expect the IQ score to be for the following individuals, given their SAT scores? Individual SAT Score IQ Score Susan 850 Sall..
question consider the following set of sample data78 121 143 88 110 107 62 122 130 95 78 139 89
Plot on the same graph the pdfs for a Cauchy C(5, 4) random variable and for a Gaussian N (5, 4) random variable. Compute the probability P (X ≥ μ + 1.96σ) for each random variable, where, for the Gaussian random variable
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