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Factories are being compared to see if there is a difference in the average defect rates of the chips they produce. In the first factory 250 chips are sampled, In the 2nd factory 350 chips are sampled. Proportions of defective chips are 4.0% and 6.0% respectively. Using a confidence level of 95%. Which statement is supported by data?
A) 1st factory average defect rate is lower than the 2nd on 95 out of 100 days. B) Not sufficient evidence to show a significant difference in average defect rate of 2 factories. C) There is a significant difference in average defect rate of 2 factories.D) None of the above.
Ppopulation with a mean of 240 and standard deviation of 18. Find the mean & standard deviation of sample distribution of the mean?
Evaluate the mean, the median, and the mode of the salaries. Which best describes a typical salary and Evaluate the range, variance, and standard deviation of the data set. Interpret the results in the context of the real-life setting.
Find all critical points of f (x) and classify them as maximums or minimums. State the intervals where f (x) is increasing and decreasing.
What is the probability that two of absent students were girls.What is the probability that two of absent students were boys.
What are the expected value and standard deviation of the number of small aircraft that arrive during a 90-min period?
They both want to know what family member typically does the research about possible honeymoon destinations, and who primarily makes the decision on selecting the destination.
Determine the probability mass function of the salesperson's November sales (in $). What is the probabiity that his sales for November will be less than 100k? Find the mean and standard deviation of the November sales.
Construct a 90% confidence interval to estimate the difference of (average number of gallons sold on weekdays - average number of gallons sold on weekends). Assume the population standard deviations are the same for both weekdays and weekends.
Recognize and explain potential threats (up to 3) to external validity.
How should he go about taking samples to gather data for testing the hypotheses?
Which study has the higher probability of a Type II error, the 60-subject study or the 100 -subject study? Which study has higher power?
The amount of corn chips dispensed into a 10 ounce bag by the dispensing machine has been identified at possessing a normal distribution with a mean of 10.5 ounces and a standard deviation of .2 ounces.
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