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A survey of 68 courses delivered fully online found a mean of 13.5 videos with a standard deviation of 2.81. You can assume that the number of videos in an online course is normally distributed. Find the 89% confidence interval for the mean number of videos in a fully online course.
Write a correct null and alternative hypothesis for testing the claim that the mean life of a battery for a cell phone is at least 115 hours.
Confidence levels. If a higher con_dence level means that we are more confident about the number we are reporting, why don't we always report a confidence interval with the highest possible confidence level?
Test whether there is any change in IQ after the training program (The absolute value of 1 for 4 degrees of freedom at 1% level for one-tailed and two tailed tests are 3.747 and 4.604 respectively)
from a box containing 4 dimes and 2 nickels 3 coins are selected at random without replacement. find the probability
Determine the Midrange. Determine the Standard Variance. Determine the Standard Deviation
the following data were obtained from a survey of college students. the variablenbspxrepresents the number of
the salinity in the ocean is expressed in parts per thousand ppt. during november 2008 the mean salinity in a region of
Estimate, with 95% confidence, the actual average settlement time (in days) for claims received by the Explorer Fund only. Interpret the result.
Assume that the light bulbs produced in Factory A have a lifetime you can model as being exponentially distributed with parameter A. The posterior distribution of with these assumptions. What is the name of this type of distribution?
He assigns a B to students who score between 1 and 2 standard deviations above the mean and a D to students who score 1and 2 standard deviations below the mean. All other students get a C. What percent of the class receives each grade assuming the..
The unit cost of producing a steak dinner at the Smalltown Inn is $6. If a restaurant charges p dollars for a steak dinner, customers will demand 200 - 5p steak dinners per week. To maximize the profit earned on steak dinners, what price should th..
As part of his review for a chemistry test, a student randomly selects (without replacement) 40 out of 102 elements listed on the standard tables, and tries to guess their atomic numbers.
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