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Using traditional methods, it takes 108 hours to receive a basic driving license. A new license training method using Computer Aided Instruction (CAI) has been proposed. A researcher used the technique with 280 students and observed that they had a mean of 109 hours. Assume the standard deviation is known to be 6. A level of significance of 0.02 will be used to determine if the technique performs differently than the traditional method. Find the value of the test statistic. Round your answer to 2 decimal places.
Enter the value of the test statistic.
If daily water demand is approximately normally distributed with a mean of 5 ml and a standard deviation of 1.25ml: Estimate the number of days in a (365 day) year on which daily consumption is:
Compute z values for each and comment on your findings.
he number of reservations for its January flight to Germany, 305 reservations for tourist class,185 Economy class, and 206 first class. To fill all the seats how many of each kind of plane should the company fly?
a warehouse distributor of carpet keeps 6000 yards of deluxe shag carpet in stock during a month. the average demand
Based on these observed data, do you think there is a relationship between sex and handedness in the population represented by this sample? Why or why not?
a sample of four tires is taken from a lot of brand-a tires. another sample of four tires is taken from a lot of
Suppose Abraham Lincoln had answered a survey questionnaire in which he indicated that he had not received a grade school diploma. The researcher found that Lincoln's educational score did not correlate with the expected variables. What was wrong?
Calculate s(k) for each natural number k from 1 through 15. Are the numbers SQRT(5), PI, and -6 in the domain of the function s? What is the domain of the function s?
How is the expected frequency of a category calculated for a goodness-of-fit test? What are the degrees of freedom for such a test?
Production of the three machines one article is selected at random. if it found that this article is defective, what is the probability that it was manufactured by machine X?
When sampling is from a normally distributed population, is there an advantage to taking a large sample? Explain.
scores on the critical reading part of the sat exam in a recent year were roughly normal with mean 501 and standard
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