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A purchasing agent for a national chain of seafood restaurants wants to estimate the mean weight of shrimp in a large catch. How many shrimp should be sampled from the catch to be 95% confident that t
A political strategists believes that less than 55% of voters in a certain state support a particular issue. He then commission s a poll of 500 voters and 54% of them support this issue. If a = .05, i
A random sample of rivets from 2 suppliers were compared to see what the mean diameter was from each and a test to determine whether the population means were the same for the 2 suppliers. Now a compa
Find the average of the three trials, so the correct number of significant figures, and decide if these measurements gave an accurate result.
How to determine the sample size for comparing mulltiple parameters like Height , weight, Blood pressure ,Blood parameters like blood glucose, total cholesterol, etc in two different populations?
Calculate the test statistics Calculate the test statistics
Site preparation for new housing developments for tracts of 40 houses is normally distributed with a mean of 250 workdays and a standard deviation of 25 workdays.
Running a study comparing 3 different products on five different experimental visits. The same subjects are used for each visit and the same tests are carried out each time on all 3 products. What is
Find its marginal revenue function? Find its marginal revenue function?
Calculate the confidence intervals about a regression line. My data is log transformed and has high R-square value for what is called "power" equation in Excel. My CI's are narrow at the top of the gr
Assume you have the following data: H1: µ ? 200, S =30, n = 64, and X =218. Conduct a two tailed hypothesis test at the 0.05 significance level.
A random sample of 100 students who took a statistics exam were asked their score on the exam. The mean score on the test was 50; the standard deviation was 10. The scores are normally distributed.&nb
Find the 95% prediction interval for the heart rate reduction expected for an individual receiving a dose of 2.00 mg
If the z score is less than 0, what can be said of the corresponding raw score?
Lenght Of Pregnancy. A woman wrote to Dear Abby and claimed that she gave birth 309 days after a visit from her hushand , who was in the Navy. Lengths of pegnancies have a mean of 268 days and a stand
Evaluate the performance of the judges. Evaluate the performance of the judges.
A company is filling bags of rock salt to a level of 50 pounds. It believes that all bags are filled correctly, but would like to use a hypothesis test with an alpha of 0.05 to check this belief. The
What is the formula used to get percentile from z-score? I have z-scores but am using excel and want to be able to type in a formula to figure percent instead of coming here and continuing to figure i
Suppose that the scores of architects on a particular creativity test are normally distributed. What percentage of architects have Z scores (a) above .10, (b) below 10, (c) above .20, (d) below .20, (
Compute the 90% confidence interval about m if the sample size, n, is 55. How does does increasing the sample size affect the margin of error, E?
An auditor reviewed 25 oral surgery insurance claims from a particular surgical office, determining that the mean out-of-pocket patient billing above the reimbursed amount was $275.66 with a standard
Among those taking the Graduate Record Exam, 18 people are randomly selected.
Suppose a friend of a friend claimed to have ESP and agreed to sit just on time and guess at 100 cards. Suppose she made 36 matches. Calculate the probability of this many, or more, matches if only ch
Draw a scatter diagram with body weight as the independent variable and wing length as the dependent variable. Find the equation of the line of best fit.
Interstate 90 is the longest of the ease-west U.S. interstate highways with its 3,112 miles stretching from Boston, MA at I-93 on the eastern end to Seattle