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Assignment #7 - CHEM
St. Cloud State University
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MATH140 Assignment #
Question #1) [15 Points] According to Neilson & Co adults watch an average of 30 hours of a TV a week. Assume the population standard deviation for ‘hours of TV watched per week’ is 12 hours.
If a random sample of 30 adults is selected, what is the probability the sample mean for hours of TV watched per week is less than 28 hours?
If a random sample of 30 adults is selected, what is the probability the sample mean for hours of TV watched per week is more than 31 hours?
If a random sample of 30 adults is selected, what is the probability the sample mean for hours of TV watched per week is between 28 and 31 hours?
Question #2) [15 Points] According to the Department of Education, 11% of adults have an advanced degree. Suppose a random sample of 500 adults is taken and the proportion with an advanced degree is recorded.
Describe the sampling distribution for the sample proportion of adults who have an advanced degree in a sample of 500. [Note: round the standard deviation to four decimal places]
What is the probability that in a random sample of 500 less than 10% would have an advanced degree?
What is the probability that in a random sample of 500 more than 65 would have an advanced degree?
Assignment #7 - CHEM
Course: Chemical Information (CHEM 391)
University: St. Cloud State University
