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An accounting firm is hired to check the sales entries of a large corporation and their goal is to certify that less than 5% of the entries have errors. there are around i million entreis for them to check and it usually takes around 10 mnutes for them to check a single entry. How long would it take to compute the % of entries having errors if they check all million entries? How long would it take to estimate the % of entries having errors using a random sample big enough to get a margin of error less than 2%?
A study wants to examine the relationship between student anxiety for an exam and the number of hours studied. The data is as follows:
Outline the difference between the t test for independent groups and the t test for matched groups. A researcher computed the F ratio for a four-group experiment.The computed F is 4.86. The degrees of freedom are 3 for the numerator and 16 for the ..
Is there evidence to suggest a difference in the mean waiting times at the four body shops?
Students are the University of New Harmony received 10, 000 course grades last semester. The table below breaks down these grades by which school of the university taught the course.
At a computer manufacturing company, the actual size of computer chips is normally distributed with a mean of 1 centimeter and the standard deviation of 0.1 centimeter. A random sample of 12 computer chips is taken. What is the possibility that th..
An LU professor is interested in whether there is a difference between undergraduate students and graduate students in the amount of time spent praying each day.
What is the average number of callers waiting to place an order? (c) Ashleys is considering adding a second clerk to take calls. The store would pay that person the same $ 10 per hour. Should it hire another clerk?
Standard deviation of sample was $3.53. Determine point estimate of population mean. Determine the 95% confidence interval of population mean. Suppose the variable is normally distributed.
In multi-choice test, each question has four options. Students wil get 10 points for each correct answer; lose four points for each incorrect answer; and receive no points for unanswered questions.
If the sample standard deviation of the sample was $630 also the sample size was 50. Findout the 90% confidence interval of true mean.
Test for single Proportion - Are the data consistent with the model? Answer yes or no, and explain briefly.
Assuming the percentages are based on independant simple random samples of 1,000 first year college students drawn each year.
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