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In a two-population test, when will you use paired samples?
Provide an example and state the Null and the Alternative hypothesis for the examples in symbolic form.
The mean noise level for 24 hospital operating rooms was 56.3 dBA and the standard deviation was 7.5 dBA. At α = .05 can it be concluded that there is a difference in means?
For sample of size 100, what is the mean and standard deviation of the sample mean.
A researcher demonstrated a correlation of r = 0.60 between teacher attire and student academic performance across 150 grade schools in her state.
We have a deck of 52 playing cards. What is the probability of drawing?
Then estimate demand again with a weighted moving average in which sales in the most recent year are given a weight of 2 and sales in the other two years are each given a weight of 1.
Probability based on normal distribution. Suppose among X has a normal distribution, and find the indicated probability.
What is the point estimate of the students mean salary? What is the point estimate of the standard deviation of the students salaries? Construct a 95% confidence interval for the mean salary of the DM students?
After calculating the sample size needed to estimate a population proportion to within 0.04, your statistics professor told you the maximum allowable error must be reduced to just .01. If the original calculation led to a sample size of 800, the s..
Consider an acceptance-sampling scheme in which factory takes delivery of a batch of components if random sample of 400 components contains fewer than M defectives.
Administrators at a university are planning to offer a summer seminar. It costs $3000 to reserve a room, hire an instructor, and bring in the equipment. Assume it costs $25 per student for the administrators to provide the course materials.
We are interested in determining whether or not the opinions of the individuals (as to Yes, No, and No Opinion) are uniformly distributed.
The nation health department has concerns with the chlorine level of 0.4% mg/mL at a local water park raises to unsafe level.
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