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Study conducted with groups of N=12 children each (sample size), to evaluate how long it takes to learn foreign language on a basic communication level. It was found that it takes them in average Íx =30 days (sample average) with a sample standard deviation of s=5 days.
Construct a 90% confidence interval for the population mean for the time needed for children to learn basics of foreign language.
(Population standard deviation is not known. For Margin of Error use t-value from attached Appendix Table for t-Distribution)
Normally distributed with a mean of 113 grams and a standard deviation of 5.4 grams. Find the probability that if 7 bags are randomly selected, their mean weight exceeds 114 grams.
a large manufacturing firm tests job applicants who recently graduated from college. the test scores are normally
Find the probability that both products successfully complete the two-part process - Find the probability that neither product successfully completes the two-part process.
CS544 Module - Calculate the inclusion probabilities using the S82 variable. Using these values, show the sample drawn using systematic sampling. Show the frequencies for each region (REG). Show the percentages of these with respect to the entire ..
The number of employees who call in sick on Monday follows a Poisson distribution with a mean value of 3.6. What is the probability that no more than three employees will call in sick next Monday?
If the station did not have access to appropriate computer software or a table of random digits, explain how they could randomly choose a birthday each day.
Make a plot with degrees of freedom from 2 to 100 on the x axis and t* on the y axis. Draw a horizontal line on the plot corresponding to the value of z* = 1.96. Summarize the main features of the plot.
suppose the heights of 18-year-old men are approximately normally distributed with mean 68 inches and standard
describe and explain two alternatives to nhst. what do their proponents consider to be their
Checking the output by almost continuous sampling since the abnormal condition began. What is the probability that in a sample of 10 pieces: Exactly 5 will be defective?
Is the estimate from the participants significantly higher than the actual number (µ = 3.1)? Use a one-tailed test with = .05.
a fair coin is tossed 100 times. what does the chebyshev inequality tell you about the probability that the number of
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