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The lengths of 45 French fries, randomly selected from a huge shipment, were measured and a mean length of 8.4 cm with standard deviation of 3.1 cm was found.
a. Construct a 95% confidence interval for the population mean length of a French fry.
b. Compute the number of French fries that would have to be sampled and measured to be 98% sure of being within 0.4 cm of the true mean.
Find out the suitable critical value(s) for this situation given a 0.05 significance level. Find out/compute the value of sample test statistic.
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The paired data below consist of the test scores of 6 randomly selected students and the number of hours they studied for the test.
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The instructor plans to draw a histogram of the 1,100 sample proportions. What will be the approximate mean for the 1,100 sample proportions?
Based on this information, by what factor does the risk of having an accident increase due to driving while intoxicated?
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