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The running time for videos is normally distributed with mean 390 and standard deviation 148. suppose a sample of 40 videos are selected, what is the probability that the mean running time of the sample exceeds 360 seconds?
If a lot is known to contain 10% defective items, find out the probability that lot will be rejected? Accepted?
This table gives three measurements of 10 samples made in a production run. Use statistical process control method to solve problem.
what is the appropriate procedure to test for significant difference in means between two groups? Implement the procedure using the critical-value method and what is the p-value?
If the writing scores for the population have a standard deviation of σ = 20, does the sample provide enough evidence to conclude that the new composition course has a significant effect?
Can it be concluded that, X, number of boys in two-child families of preeminent scholars, is binomiallydistributed? Let α=0.05.
40 were in favor of the Independent candidate, and 140 were undecided. At a 1% level of significance, test to see if the proportion of voters has changed. Calculate the value of the Chi-Square Test Statistic for this problem. What is it?
Draw a tree diagram depicting the sample space outcomes for this experiment.
Constructing histogram, Using a normal probability plot, Plotting residuals versus x values.
The Bureau of the Census reports that the average commuting time for citizens of both Baltimore, Maryland, and Miami, Florida is approximately 29 minutes (uMiami=29 and uBaltimore=29 minutes).
What does central limit theorem say about distribution of John's average payoff after 365 bets in a year?
The diameters of ball bearings are distributed normally. The mean diameter is 74 millimeters and the variance is 16. Find the probability that the diameter of a selected bearing is less than 78 millimeters.
Researcher asked group of 30 students - 12 of them supported change, 13 of them didn't, and 5 had no opinion. This is not binomial model as?
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