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People were polled on how many books they read the previous year. How many subjects are needed to estimate the number of books read the previous year within one book with 99% confidence? Initial survery results indicate that standard deviation=11.4 books. 99% confidence level requires ______ subjects?
Find the proportion of employees who are managers and have MBA degrees.
Let X be net income of the AirCanada from the above described random experiment. Compute the probability function of X.
If 9 loads are chosen at random for a weight check, find the probability that the mean weight of those loads is less than 47.6 tons. Assume that the variable is normally distributed.
A slot machine in Reno costs $1 to play. If the jackpot is $1,000 and the expected value is $ - 0.50 find the probability of winning.
Find the mean/standard error of the sampling distribution of the proportion. Assume that 26% of students at a university wear contact lenses. We randomly pick 300 students.
The following data are from two separate samples. Does it appear that these two samples came from the same population or from two different populations?
Let X be the number of gallons of ice cream that is requested at a certain store on a hot summer day. Assume that f(x)= 12x(1000-x)^2/10^12, 0
Test, at the 5% level of significance, whether the population standard deviation of hours spent studying is less than 10. Use the Critical value approach.
Determine the oucomes in the sample space, and construct a probability distribution table. Find the expected value of the following game.
Promotion occurs on average every 10 days in a large corporation. What is the probability that the next promotion will occur within:
Which 56 have this coverage. Does this support the claim that the proportion is less than 15%? Test the claim at the 5% level by the following steps.
A researcher wants to know if there is a relationship between a person's highest level of education (IV) and differences in life satisfaction (DV).
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