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An auditor for Health Maintenance Services of Georgia reports 40% of policyholders 55 years of older submit a claim during the year. Fifteen policyholders are randomly selected for company records.
a. How many of the policyholders would you expect to have filed a claim within the last year?
A startup company began manufacturing toy dolls tailored to environmental-oriented customers. Using linear regression, find a linear model for the Cost Function if the company's yearly costs for the next five years were (2005,$8,000,000),(2006,$1..
Explain the relationship between sample size and the likelihood of a statistically significant difference between the measured values of two groups.
Prediction interval for the regression line - Using the age and sick days data from table below, find the 98% prediction interval when x = 47 years.
The manufacture of a new compact car claims the miles per gallon (mpg) for the gasoline consumption follow a normal distribution with mean of 25.9 mpg and standard deviation of 9.5 mpg . if 36 such cars are tested , what is the probability the ave..
The mean time to download an Google video is 1 minute 30 seconds. Suppose the download time is normally distributed with standard deviation of 20 seconds.
Assume the observed value of the test statistic is 1.53. What is the smallest level for which there is sufficient evidence to reject H 0 (i.e. the p-value for this test)?
Is there sufficient evidence for concluding that true average repair time exceeds 200 min? Carry out a test of hypotheses using a significance level of .05.
The National Survey of Student Engagement (NSSE) surveys freshmen and seniors about their level of engagement in campus and classroom activities that enhance learning.
Take your data and arrange it in the order you collected it. Count the total number of observations you have, and label this number N. Then create another set of data starting from one and increasing by one until you reach N.
A random sample of 58 fish is taken from the tank. Let x be the mean sample length of these fish. What is the probability that x is within 0.5 inch of the claimed population mean? (Round your answer to four decimal places.)
Using α = 0.05, does this sample provide enough evidence to conclude that the average utility bill in Delaware was lower in the winter of 2011-2012 than it was in the winter of 2010-2011?
A sample of 350 lenses and found 5 lenses with surface defects. Formulate an appropriate test for the qualification of the polishing machine using an α = 0.05."
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