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The number of hours a 100 watt bulb will operate before burning out is approximately normally distributed with standard deviation σ=50.
a. if the mean µ=900, what is the probability that a light bulb will burn out in less than 966 hours of use?
A questionnaire will be published and the first 1000 completed questionnaires will be analyzed. Which of the following errors will be associated with the sample?
What is the probability that the second one selected is defective given that the first one was defective? (c) What is the probability that both are defective?
Create the 90% confidence interval for difference in average damage amount for two kinds of SUVs. Interpret this interval.
What is the probability that the total weight of eight people exceeds 1300 pounds? 1500 pounds? (Assume that the probability distribution is approximately normal).
Finding the probability of each event in a group of events of different possibility
According to an internet posting, 80% of adults enjoy drinking beer. Choose a group of 3 adults at random. The probability that none of them enjoy drinking beer is:
Test at 1% significance level that there exists a difference in proportion between men and women drivers who always use seat belts.
In a random sample of 16 mountain climbers who are going to attempt Mt. Mckinley, what is the probability that at least 10 reach the summit?
The booked passengers actually arrive for the flight. Estimate the probability that if the company books 170 persons, not enough seats will be available.
Create a linear model to estimate the number of points students will score on the next exam from the number of hours the student studies.
Is there enough evidence to believe that the average credit card debt has increased? Use a=0.05. Give a possible reason as to why or why not the debt was increased.
A regression equation was computed to be Y= = 35 + 6X. The value of the 35 indicates that:
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