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The lifetime of a color television picture tube is normally distributed with the mean of 7.8 years and a standard deviation of 3 years.
a. What is the probability that a picture tube will last more than ten years?
b. If the firm guarantees the picture tube for 2 years, what percentage of the television sets sold will have to be replaced because of the picture tube failing?
c. How long should the warranty period be (in years) if they want to replace only 1% of the television picture tubes?
What is the probability of a false negative test (the probability that a person having muscular distrophy tests negative)?
You will investigate four different scenarios of population growth also decline in this town. Graph the model as well as investigate it by four different growth models.
What is your decision regarding the null hypothesis and interpret.
Perform the five-step hypothesis test on the data. - LORA - this is the portion I am responsible for based on using the nonparametric hypothesis testing.
In an article entitled "Fuel Economy Calculations to Be Altered," James R. Healey indicated that the government planned to change how it calculates fuel economy for new cars and trucks.
Conduct a test to determine whether blood lactate level (y) is linearly related to perceived recovery (x). Use alpha = .05. Find the p-value for testing the hypotheses you gave in the previous problem. Show all decimal places in your answer.
Compute the probability of exactly 0,1,2,3,4, and 5 arrivals per day.
Assume that you are conducting a survey of customer satisfaction regarding their cellular phone.
Construct a 95% confidence interval for the average amount its credit card customers spent on their first visit to the chain's new store in the mall assuming that the amount spent follows a normal distribution.
The best estimator or appreciative for the population proportion is 0.45. How large must the sample be?
The mean of a standard normal probability distribution.
For any distribution the score that separates the highest 10% from the rest of scores is called.
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