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The power generated by a solar electric generator is normally distributed with mean 15.6 kilowatts and standard deviation of 4.1 kilowatts. We may be 95% sure that the generator will deliver at least how many kilowatts?
A random sample of 40 part time workers has a mean annual earnings of $3120 and a population standard deviation of $677. Compute the 95% confidence interval for the mean.
CD Camera produces a new camera that it claims can take an average of more than 7 photographs per second. A test of 36 randomly selected cameras yielded the following sample values:
The outcomes that you would expect from a die that is perfectly fair and unbiased. Does the loaded die appear to differ significantly from a fair die that has not been "loaded?"
Share with your peers the null and alternative hypotheses for a decision that is relevant to your life. This can be a personal item or something at work.
Construct a 98% confidence interval for the average life expectancy of countries around the world. The data appear to be normally distributed.
if a vsdmotor combination has a torque of 100 n.m at the rated speed and full power what is the maximum torque it can
suppose that a population is known to be normally distributed with mean 2000 and standard deviation 230. if a random
a box contains 11 red balls 5 green balls and 4 black balls. a sample of 8 is to be picked from the box. in how many
At the .05 significance level, can the developer conclude there is a difference in the mean income? Use the five-step hypothesis testing procedure.
If the mean number of serious accidents per year in a large factory (where the number of employees remains constant) is five, find the probability that in the current year there will be:
assume that a simple random sample has been selected and test the given claim. use the p-value method for testing
from past experience it is known that 90 of one-year old children can distinguish their mothers voice from the voice of
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