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Find the z-scores that separate the middle 71% of the distribution from the area in the tails of the standard normal distribution.
How much does the low temperature vary on this date? In other words calculate the variance and standard deviation?
Choose one of the options below that explains what information is provided in the interval that is not in the significance test results:
What is the probability of randomly selecting a sample of 50 one bedroom apartments in this town and getting a sample mean of less then $530 if the population standard deviation is $100?
one sample is selected to represent scores in treatment 1 and a second sample is used to represent scores in treatment
Assuming this is literally true, how can it be explained? What facts and/or statistics would you need to know to expose this misleading claim?
A rectangular garden has dimensions of 25 feet by 19 feet . A gravel path of equal width is to be built around the garden. How wide can the path be if there is enough gravel for 672 square feet?
Assume that both samples are independant simple random samples from populations having normal distributions.
Plot the market-share data. (b) Describe the trend (if any) and discuss possible causes. (c) Fit three trends (linear, exponential, quadratic).
question a manufacturer of chocolate candies uses machines to package candies as they move along a filling
Ten members of a fraternity take a statistics course. Here are their scores on the first exam in the course:
At some point too much stimulation will limit the ability to focus and pay attention. What would happen to the size and the sign of the correlation coefficient if we correlated these two variables?
The two cars drove a combined total of 1450 miles, and the sum of their fuel efficiencies was 40 miles per gallon. What were the fuel efficiencies of each of the cars that week?
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