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If the random variable T is the time to failure of a commercial product and the values of its probability density and distribution function at time t are (t) and F(t), then its failure rate at time t is given by Thus, the failure rate at time t is the probability density of failure at time t given that failure does not occur prior to time t.
(a) Show that if T has an exponential distribution, the failure rate is constant.
(b) Show that if T has a Weibull distribution, the failure rate is given by αβt β-1.
Calculate chi-square for the cross-tab. Show your work. Is there a statistically significant relationship between these variables?
scientists at the hopkins memorial forest in western massachusetts have been collecting meteorological and environ-
Please show me how to do this problem and show the details of each step. I am at U of Phoenix and have several other similar problems or problems related and it would be great help to see how it is done. Thanks, Alex
Has there been a significant decrease in the proportion of students who change their major after the first year in this program? Test at the .05 level of significance.
If a sample of 20 dish owners is randomly selected the what would be the probability that more than 11 dish owners in the sample subscribe to at least one premium movie channel?
Discuss three measures of central tendency for the dependent variable. Is this distribution skewed? If so, in what direction? Explain your answer. Why would you NOT attempt to determine the central tendency of the independent variables?
Another location if it meant a substantial promotion. Based on these findings, write a brief note to management regarding all executives in the firm.
Construct a 99 percent confidence interval for the true mean diameter of a nickel. (c) Discuss any assumptions that are needed. (d) What sample size would ensure an error of ± 0.0005 inches with 99 percent confidence?
What is the probability exactly one of the three audited had a charitable deduction of more than $1,000? What is the probability at least one of the audited returns had a charitable contribution of more than $1,000?
The width of the confidence interval expands more when the confidence level increases. In addition, the sample size and the variability also influence the width of the confidence interval.
p-value from tstat. a one-sample t statistic for h0 micro 0 based on n 16 is tstat 2.44.a how many degrees of
what determines the width of bars in a histogram?a. the apparent of limits of a score or intervalb. the real limits of
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