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Suppose you have a set of blood pressures with a mean of 80 diastolic and standard deviation of 5 points. assuming a normal distributions of blood pressures, what two values should 95% of all blood pressures lie? show work.
A chance sample of 50 families revealed an average or median of $112,000 and a standard deviation of $40,000. What is the standard error of the average or median?
Suppose we are testing if the true mean amount of gas sold on a day is less than 900 gallons, at a 5% level of significance, the value of z* would be?
What is the 95% confidence interval for the proportion of the population of employees who strongly dislike their current work experience?
Construct a 99% confidence interval for the proportion of customers favoring underground installation.
The analysis needs to be re-run adding the error into the regression sum of squares.
In a certain distribution of numbers the mean is 60 with a standard deviation of 8. Use Chebyshevs theorum to tell the probability that a number lies in each interval.
The Swansons are planning to fly to Hawaii from Toronto with a stopover in Los Angeles. There are five flights they can take between Toronto and Los Angeles and ten flights between Los Angeles and Hawaii.
Modify (change) your sample size to 18600. Construct a new 95% Confidence Interval.
Securities Exchange Commission (SEC) was $22,500, with a standard deviation of $7,500. The SEC overseers want to draw a sample of 100 accounts to help assess the impact of the fund's freeze on the account holders.
When determining the sample size necessary for estimating the true population mean, which factor is not considered when sampling with replacement
A group of sheep, infested with tapeworms, are randomly divided into two groups as follows. Each sheep is assigned a number (1 through 20) and then 10 numbers
Let m denote a natural number. Use any properties of the natural numbers to argue that m x m is not equal to m + m.
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