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Someone proposes a "hothouse" treatment for gifted children. Four-year-olds are tested, and those whose IQs appear to be above 140 are selected for special treatment. Before treatment, mean IQ of this group is 150. Let us suppose that treatment has no effect on IQ.What mean IQ would you expect when the children are retested 1 year later? Explain.
Let x be amount of May rainfall in local area, and suppose that x is uniformly distributed over interval three to six inches. Write down the formula for probability curve of x.
At a significance level of 0.01, can you conclude that the mean times are different? Assume each population of relief times is normally distributed and that the population variances are equal.
Write an explanation to such a person about how polls can get a good idea of how the entire population will vote by asking a relatively small number of voters.
Assume that the probability of a randomly selected person's being "very interested" is 0.88 and that people are selected independently of one another.
Make a scatterplot with weight on the x-axis and cost on the y-axis. Include the regression line on your scatterplot.
A researcher has used a standard test in measuring the job-satisfaction scores for employees randomly selected from three departments of a large firm. Interpret the results summarized in the following Minitab output.
Insurance policies ever have to pay out. You decide to test his claim at the a=0.1significance level. With a critical value of -2.33, compute the sample statistic.
new york city is the most expensive city in the united states for lodging. the mean hotel room rate is 204 per night
Why do you think the control of women is a central component in many religions?
Is there sufficient evidence to support the claim that women in the different age categories have different mean blood pressure levels?
1.a pediatrician is interested in studying the effect of motrin on reducing temperature in young children. four
The histograms show the distribution of the estimated numbers of hours per month spent on social services for project boys (left) and project girls (right).
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