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Suppose the counselor found the sum of squared deviations from the mean of the sample to be 135. Given that he tested 10 people, what would be the estimated population variance?
A business man arrives on a randomly selected day in December. What is the probability that the temperature will be above?
A statistics professor would like to determine whether students in the class showed improved performance on the final exam as compared to the midterm examination.
According to the National Football League, the average salary for players for the 2010 season was about $1.9 million while the median salary is around $770,000. Why are both numbers reported? What might the difference between the two statistics me..
Find the quotient and remainder when x^7 + x^4 + x + 1 is divided by x^3 + x^2 + 1 over mod 2. Please show the detailed working along with explanations as needed.
Last semester a certain professor gave 13 as out of 285 grades. if grades were assigned randomly what is the probability of an A.
Nationwide, the average waiting time until a electric utility customer service representative answers a call is 210 seconds. The Gigantic Kilowatt Energy Company randomly sampled 30 calls and found that, on average, they were answered in 183 secon..
Explain your answer to someone who is familiar with the t test for a single sample, but not with the t test for independent means.
A private medical clinic wants to estimate the true mean annual income of its patients. If the confidence level is 95%, find the required sample size in order to meet the needs.
A random sample of 20 single men was asked if they would welcome a woman taking the initiative in asking for a date. What is the probability that none of the men will say yes?
Assume a mean wage of $1,000 and standard deviation of $100. What's the probability of finding an employee with a wage of between $790 and $1000?
A simple random sample of 1000 Americans found that 61% were satisfied with the service provided by the dealer from which they bought their car.
Bags of cookies that have weights in the upper 7.5% are too heavy and must be repackaged. What is the most a bag of cookies can weigh and not need repackaging?
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