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A national poll reported that 58% of those with Internet access have made purchases online. To investigate whether this percentage applies to its own state, a legislator commissions a study. A random sample of 400 state residents who have Internet access is taken. Of those 400 respondents, 215 said that they have made purchases online. Does this sample provide sufficient evidence to conclude that the state differs from the nation with respect to making purchases online? Use the p-value to conduct the hypothesis test and use a .05 level of significance.
About how many of the 250 should we expect to have female CEOs if the proportion of female CEOs is 4%, as it is for the Fortune 500 companies?
It took a contractor 1285 hours to manufacture their first unit of an item. If the contractor expects to achieve a 92% unit learning curve, how many hours would be required to manufacture units 52-100?
What percentage of the checkout times was less than 3 minutes? ? In what class interval must the median lie? Explain your answer.
several statistical tests have a way to measure effect size. what is this and when might you want to use it in looking
You have agreed to payments of $335 per month and will charge a monthly interest rate of 1.11 percent. How many months will it take for the account to be paid
Assume that, on average, 95% of all ticket holders show up for a flight. If a plane seats 200 people, how many tickets should be sold to make the chance.
Assume the selections were made randomly. Construct the probability distribution of the number of Ivy League graduates who could fill these positions.
The average fill volume of a regular can of soft drink is 12 ounces. Suppose the fill volume of these cans ranges from 11.97 to 12.03 ounces.
A student receives test scores of 62, 83, and 91. The student's final exam score is 88 and homework score is 76. Each test is worth 20% of the final grade, the final exam is 25% of the final grade and the homework grade is 15% of the final grade...
Find the mean, variance, and standard deviation of the change in class size.- Suppose two classes are selected at random. Find the probability that both classes remain the same size for the entire year.
Five percent of the respondents gave $25,000 or more to charity over the previous year. Develop a 95% confidence interval for the proportion who gave $25,000 or more to charity.
suppose n has a binomial distribution with n trials and success rate p while x has binomial distribution with n trials
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