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Suppose a highlighter manufacturer wanted to find out whether a highlighter lasted longer than the claim of 14 continuous hours. They tested 40 highlighters and recorded the number of continuous hours the highlighter wrote before drying up. Test the hypothesis that the highlighters wrote more than 14 hours. Following are the summary statistics. x bar=14,5 hrs, s= 1.2 hours. Report the test statistic, p-value, the null hypothosis decision. At the 5% significannce level, state your conclusion about the original claim.
A) 0.023
B) 0.155
C) 0.345
D) 0.477
Calculate the Coefficient of Skewness and the Coefficient of Variation for time spent working on QM.
Independent random samples taken at two companies provide the following information regarding the anual salaries of the employees.
a professor is interested in whether there is a difference in counseling students statistics competency scores among
chocolate-coated sugar fun blast cereal is filled in boxes by weight. the weight of the boxes is approximately normally
How to get original X variable in terms of the variance-covariance matrix for the regression coefficients pertaining to the transformed x variable? Y^=b0+b1x+b11x^2, x=X-mean(X), we get b0'=b0-b1mean(X)+b11(X^2),b1'=b1-2b1mean(X), b11'=b11
What is the estimated standard error of the sample mean? Construct a 95 percent confidence interval for the population mean category fluency test score.
Clearly a straight line model does not accurately describe what is going on with this data. Does this mean there is no relationship between income and time?
Suppose that four families are surveyed and that each one reports whether its income exceeded the reported medium for that year. List the sample points.
If we know that the length of time it takes a college student to find a parking spot in library parking lot follows a normal distribution with mean of 3.5 minutes and a standard deviation of 1 minute, determine the probability that a randomly sele..
She asked her assistant for a 95% confidence interval, approximately how large a sample did her assistant use to determine the interval estimate?
Consider two independent Poisson processes, with arrival rates α and β, respectively. Determine: The probability q that the next three arrivals come from the same process The PMF of N, the number of arrivals from the ?rst process that occur before..
The Charm City Fan Company manufactures two products: large fans and medium fans. Each large fan requires 3 hours of wiring and 2 hours of drilling. Each medium fan requires 2 hours of wiring and 1 hour of drilling. There are 480 hours of wiri..
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