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A publisher reports that 52% of their readers own a laptop. A marketing executive wants to test the claim that the percentage is actually different from the reported percentage. A random sample of 190 found that 45% of the readers owned a laptop. Find the value of the test statistic. Round answer to two decimal places.
How large a sample is needed to estimate the true proportion of home owners who have vegetable gardens to within 5% with 98% confidence?
1. at one point during a fatigue test the rate of crack growth is measured as 0.57mmcycle. if the constants are known
what are the confidence limits for the proportion that plan to vote for the Democratic incumbent?
The standard deviation for Group A is 64.75 and the standard deviation for Group B is 193.25
At the end of the semester, all students took the American Chemistry Society Organic Chemistry Exam, a standardized test administered throughout the USA
The firm paid a consulting firm $50,000 last year for advice on the project. The firm will use a building that could be sold for $155,915.
Determine the maximum and minimum dollar amount spent per week for middle 50% of one-person households. Suppose that standard deviation is$5 and variable is normally distributed.
A clinical study was performed to determine if a product was effective in alleviating side effects caused by a mode of treatment. In the treated group (100 subjects) it was found that 10% had side effect A, 15% had side effect B and 65% had side eff..
A given data value has a Z-value equal to 1.2. Assuming a normal (i.e., symmetrical) continuous probability distribution, how many standard deviations is the data value from the mean?
When working with geometric distribution, having X be distributed as a geometric with a probability of success of 0.10. Does finding F(X) indicate
Nash's free throws. The basketball player Steve Nash is the all-time career free throw shooter among active players. He makes about 90% of his free throws.
His estimated regression equation was Crime = 428 + .050 Income. Which outcomes would be likely in a bivariate regression on 45 randomly chosen U.S. cities in 2005 with
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