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Can you can tell the difference between coke and pepsi in a blind taste test? Most people say they can and have a preference for one brand or another. However, research suggests the people can correctly identify a sample of one of these products only 60% of the time. Suppose we investigate this question and select a sample of 15 college students.
a. How many of the 15 students would you expect to correctly identify Coke or Pepsi?
b. What is the probability that exactly 10 students surveyed will correctly identify coke or Pepsi
c. What is the probability at least 10 of the students will correctly identify Coke or Pepsi?
A student is taking a multiple choice exam in which each question has four choices . Assume that the student has knowledge of a correct answer to any of the questions.
A population of scores has p = 44. In this population, an X value of 40 corresponds to z = - 0.50. What is the population standard deviation.
As sample size increases, the standard error of M _______________ .
Suppose it is desired to estimate the population mean number of miles with a margin of error of ± 2 miles at 95% confidence. Do the data provide this desired level of precision? What action, if any, would you recommend be taken?
Given a normal distribution with a mean of 100 and a standard deviation of 10, what is the probability that
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A salesperson makes four calls per day. A sample of 100 days gives the following frequencies of sales volumes.
A state survey investigates either the proportion of 8percent for employees who commute by car to work is higher than it was five years ago.
Suppose that 15% of all adults jog. An opinion poll asks a simple random sample of 500 adults if they jog. What is the sampling proportion in the sample who jog?
Use the Internet to find a website that shows an example or application correlation or regression in the area of your interest or in your profession. Discuss how correlation or regression was used and summarize your finding.
State the statistical assumptions of this test Using the data set you have selected, select independent and dependent variables.
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