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A particular candidate claims she has the support of at least 60% of the voters in her district. A random sample of 150 voters yields 87 who support her. The candidate wishes to test her claim at the 0.05 level of significance. Compute the value of test statistic.
Approximately normally distributed with a mean of 32 hours and a standard deviation of 2 hours. What percent of the garages take between 30 and 34 hours to erect?
What is the probability that a randomly chosen employee is an Administrator if the employee has the opportunity of gaining promotion next year?
Suzie's Sweatshirts is a home-based company that makes upscale, hand painted sweatshirts for children. Forecasts of sales for the next year are Autumn: 125
If the sum of squares regression is 1,000 and the sum of squares total is 5,000. Given that the sum of squares residual (or error) is 4,000 what is the r-squared value?
In a normal distribution with mean 59 and standard deviation 22, how large a sample must be taken so that there will be at least a 90 percent chance that its mean is greater than 53?
If one of these consumers is randomly selected, what is the probability that the person prefers design A and is under 25?
One environmental group did a study of recycling habits in a California community. It found that 73% of the aluminum cans sold in the area were recycled. (Round your answers to four decimal places.)
Carry out an overall test to determine if there is significant evidence of a difference among A; B and C, at the significance level 1%.
Show that marginal cost and marginal revenue are given by? Show that the profit maximizing quantity which equates marginal revenue and marginal cost is?
Interpret the estimated tolerance intervals and the confidence interval in the context of the situation related to the exercise.
You want to know whether the population means are different in the two populations. Conduct an hypothesis test using an alpha of .05 and the critical value method.
For each set of data, calculate mean, median, mode, range, interquartile range, standard deviation, and coefficient of variation.
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