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A sample has a mean of M=39.5 and a standard diviation of s=4.3, and produces a t statistic of t=2.14. For a two-tailed hypothesis test with a=.05, what is the correct statistical decision for this sample?
A college student is taking 5 courses in a semester. He is willing to assume that he will get an A with probability 0.10, a B with probability 0.80, and a C with probability 0.1 in each of the courses. He defines X1, X2, and X3 to be the number of..
The national average for the price of a gallon of unleaded regular gas is $1.16. I believe the price is higher in my area of the country. I want to test my claim by randomly selecting gas prices for 25 stations in my area. The following prices are..
a camera manufacturer just shipped a batch of 36 digital cameras to local retailers and seven of the cameras have a
Suppose that X1,..,Xn form a random sample from the normal distribution with unknown mean M and unknown standard deviation S, and let m and s denote the MLEs of M and S. for the sample size n=17, find a value of k such that P(m > M +ks) = 0.95
Suppose you randomly choose a sample of 30 observations from a normal distribution. You then use those observations to estimate the mean of the population.
Which is more likely to occur-more than 60% correct identifications in the sample of 200 or more than 55% correct identifications in a sample of 1,000? Explain.
If the 95% confidence interval for the mean of a variable of interest obtained from a sample for values contains a hypothesized value, µ1, of the mean.
assuming a line of regression of y 2.1 0.8x between temperatures and production yield. if the average temperature is
This information was also obtained from monitored calls. At the .05 significance level does it take longer to resolve software issues? What is the p-value?
In your opinion, which one/s of these factors (independent variables) will have a negative correlation with bone density and which one/s will have a positive correlation?
It is generally believed that electrical problems affect about 14% of new cars. An automobile mechanic conducts diagnostic tests on 128 new cars on the lot." What is the standard deviation for the sample proportion?
Does this sample indicate that the insurance company should change its premiums because life expectancy has increased?
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