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If he were to conduct a second study to reduce the maximum error of estimate to 7, about how many hard drives should he include in his new sample?
Given an actual demand of 61, a previous forecast of 58, and an > of .3, what would the forecast for the next period be using simple exponential smoothing?
What sample size is recommended for the hypothesis test (0 decimals)? Use 30 hours as an estimate of the population standard deviation.
The standard deviation was 4000 miles. Approximately what percent of the tires are likely to wear out before 40,200 miles?
In a survey, 55% of the voters support a particular referendum. If 40 voters are chosen at random, and X is the number of voters that support this referendum, find the mean and variance of X.
In a little league baseball game, suppose the pitcher has a50% chance of throwing a strike and a 50% chance of throwing aball, and that successive pitches are independent of one another. Knowing thi
When the husband is not listening to the radio, 30% of the time the wife is listening to the radio. Find the probability that: If the wife is listening to the radio, the husband is also listening to t
What sample size is needed to estimate with 95 persent confidence the mean intake of calcium within 20 units of the true mean if the intake is normal with a variance of 1900 units?
An auditor for a government agency is assigned the task of evaluating reimbursement for office visits to physicians paid by Medicare. The audit was conducted on a sample of 75 of the reimbursements,
Ten percent of adults say oatmeal raisin is their favorite cookie. You randomly select 12 adults and ask each to name his or her favorite cookie. Find the probability that the number who say oatmea
The prior year, the population mean expenditure per household was $632. Discuss the change in holiday season expenditures over the one-year period.
If possible, real world examples of what a true public/private partnership looks like or at least should address to protect the public's health.
You are inspecting peaches and you only inspect the peaches that are on the top of the barrel. What is wrong with only inspecting the peaches on the top of the barrel? How could you improve your in
Your performance as a principal depends on how well your entire group of eight-graders scores on the exam. What is the likelihood that your group of 115 eighth-graders will have an average score bel
"Talk Time on a Cell Phone Suppose the "talk time" in digital mode on a Motorola Timeport. What percent of the time will a fully charged battery last at least 330 minutes?
Construct a 99% confidence interval estimate of the percentage of all Ziac users who experience dizziness.
Suppose 2.5% of the antennas on new Nokia cell phones are defective. For a random sample of 300 cell phones, what is the probability that five of the antennas is defective?
A standard deviation of 1.00 degrees C. Find the probability that a randomly selected thermostat reads greater than -0.74 and draw a sketch of the region.
Simple linear regression and multiple regression are both based on the use of quantitative variables to predict a single dependent variable. It is the number of independent variables that changes.
A fast food franchiser is considering building a restaurant at a certain location. Accord- ing to a nancial analysis, a site is acceptable only if the number of pedestrians passing the location ave
The mean annual cost for automobile insurance was $939 for adult drivers over the age of 40. What is the probability that the sample mean annual insurance cost was more than $1005?
Jim is considering pursuing an MS in Information Systems degree. He has applied to two different universities. The acceptance rate for applicants with similar qualifications is 30% for University X
You want to rent an unfurnished one-bedroom apartment next year. The mean monthly rent for a random sample of 10 apartments advertised in the local newspaper is $1400. Assume the standard deviation
Using a significance level of 0.01, does this data argue strongly for a conclusion of possible discrimination?
The lifetimes of lightbulbs of a particular type are normally distributed with a mean of 340 hours and a standard deviation of 8 hours. what percentage of the bulbs have lifetimes that lie within 1