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The weights of the contents of cereal boxes are normally distributed, with a mean weight of 12 ounces and a standard deviation of 0.05 ounce. The weights of four cereal boxes selected at random are 12.01 ounces, 11.92 ounces, 12.12 ounces, and 11.99 ounces. Are any of these values unusual? Why or why not?
What is the probability that an individual shopper spends between $17.25 and $21.60 on impulse buys?
Describe the population of interest and calculate the numerical value of the statistic that that the EPA will use to estimate p. Construct a 95% confidence interval for the proportion of Americans who live in neighborhoods with acceptable levels of ..
At the .01 level of significance, is the mean grade of the female students higher than that of the males?
The data in the next table resulted from an experiment that used a completely random design. Test the null hypothesis that u1 = u2 = u3, where ui represents the true mean for treament i, against the alternative that at least two of the means differ..
Mention your decision regarding the null hypothesis. If H 0 rejected can we conclude that treatment 2 and treatment 3 differ? Use 95 percent level of confidence.
The analysis of variances produces df between = 3 and df within = 24. For this analysis, determine df total ?
At the .01 significance level, can the manufacturer conclude that the price reduction resulted in an increase in sales?
Calculate the population mean and population standard deviation.
The final examination of a course requires an essay. The number of pages from a sample of 25 students were collected. The data are:
Let's suppose that we have 2 variables year and age.. I use STATA to make them into dummy variables as follows:
Of the 1,4000 homemakers sampled, 420 were able to identify the brand by name. Compute the standard error of the proportion.
What is the point estimate of the proportion of the population of employees who strongly dislike their current work experience (to 2 decimals)?
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