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Two governors in U.S. history have been successfully recalled. The second was Gray Davis of California in 2003. Who was the first and what year did this occur?
1.a researcher wishes to compare the effect of the rate of stepping on heart rate in a step-aerobics workout. a
Airline company officials find that 86% of all people who make reservations show up for their flights. If an airline has accepted 240 reservations and if there are 213 available seats
Can the researcher conclude that humidity has a significant effect on eating behavior? Use a two-tailed test with α=.05. Compute the estimated d and r2 to measure the size of the treatment effect.
the following hypotheses are given.h0 p .40h1 p ne .40a sample of 120 observations revealed that .30. at the .05
Let f be a convex function defined on a convex set A ⊂ Rk . For some fixed x and y in Rk let g(t ) := f (x + ty) + f (x - ty) whenever this is defined. Show that g is a nondecreasing function defined on an interval (possibly empty) in R.
Find the discrete probability distribution for the random variable X and compute the corresponding mean and standard deviation.
Is this a one or two tailed test? (b) What is the decision rule? (c) What is the value of the test statistic? (d) What is your decision regarding H0? (e) What is the p-value? Please show me your calculations. Interpret the results.
a researcher would like to evaluate the claim that large doses of vitamin c can help prevent the common cold. one group
A grocery store manager discovers that on any given weekend 70% of the customers sales amount to more than $100. What is the probability that the first 2 sales will be over $100?
A state representative is reported as saying that about 10% of reported auto thefts involve owners whose cars have not really been stolen, but who are trying to defraud their insurance company.
Assuming the population is large, which sample size will give the smallest standard deviation to the statistic and select the numbers for the first five to be interviewed.
The producers of a new toothpaste claim that it prevents more cavities than other brands of toothpaste. A random sample of 60 people used the new toothpaste for 6 months. The mean number of cavities at their next checkup is 1.5. In general ..
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