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Refer to given Exercise. Assume that each failed item is replaced with an identical unit. Estimate the mean time to failure and the failure rate. Find a 90% confidence interval for the mean time to failure.
Exercise A sample of 20 diodes is chosen for life testing. The time to failure of the diodes is exponentially distributed. The test is terminated after six failures, with no replacement of the failed items. The failure times (in hours) of the six diodes are 530, 590, 670, 700, 720, and 780. Estimate the mean time to failure of the diodes as well as the failure rate. Find a 95% confidence interval for the mean life.
Find the probability that a randomly person consumes more than 20 pounds of Ice Cream in a year. If 36 people are selected at random and the average consumption is calculated, find the probability that the mean is less than 16 lbs.
If out of a random sample of college students expressed an intent to vote, can the aide's estimate be rejected at the level of significance? Perform a one-tailed test.
The average drying time of a manufacturer's paint is 20 minutes. Investigating the effectiveness of a modification in the chemical composition of her paint, the manufacturer wants to test the null hypothesis μ = 20 minutes against a suitable alte..
Determine the estimated regression equation that can be used to predict the star rating given the point values for execution, ease of use, and range of offerings.
What is the probability an advertising firm selected at random has under $1 million in income after taxes? (Round your answer to 2 decimal places.) - Determine the probability distribution for the number of Hondas in a sample of three cars chosen ..
Random samples of size 64 are taken from a large population whose mean is 160 and whose standard deviation is 25. What is the mean of the sampling distribution of the sample mean?
So construct a multiple regression model for predicting the crime rate based upon various explanatory variables unemployment rate, median income, education level.
The power spectrum at the input to an ideal BPF is. - Determine the autocorrelation function of the output. You may have to make a reasonable approximation to obtain a simplified form.
What inferential statistical tests are appropriate to answer your research question as to whether past participation and contribution will make a difference in people enjoying, and supporting an event?
Assume that the Japanese 1-year interest rate is 5 percent while the U.S. 1-year interest rate is 8 percent.
is the following a probability distribution? if not identify the requirement that is not satisfied.x px0 0.2291 0.1552
At the .05 significance level, can we conclude that the guideline is still reasonable?
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