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In a Gallop poll of 1012 randomly selected adults, 9% said that cloning of humans should be allowed. We are going to use a .05 significance level to test the claim that less than 10% of all adults say that cloning of humans should be allowed. What is the standard error for this problem? (use four significant digits)
A second sample of 61 has a mean of 100 and a population standard deviation of 8. Conduct a z-test about a difference in sample means using a 0.03 significance level and the following hypotheses.
Explain the difference between the null and alternative hypothesis. Which one can be proven in a statistical sense?
To assess opinion of students at Ohio State University about campus safety, reporter for student newspaper interviews 15 students she meets walking on campus.
A share tipping service claims that its selections give an average return of 10% if held for 12 months. An investor wants to investigate this claim and records the returns of the last 20 shares that have met the 12 month period.
a recent study by allstate insurance co finds that 82 of teenagers have used cell phones while driving.a state the null
What is a test statistic and how is it related to a critical value in hypothesis testing? What is the critical region in hypothesis testing and why is it important?
Sales are above 671,000 copies, and 10% of the time, sales are above 712,000 copies. Find the mean and the variance of annual sales.
Think about a real life situation that follows a linear equation, with the independent variable being years. What would the slope tell you about future years?
1.i plan an experiment to test the latest conflicting diet programs. the factor for diet will involve three different
Calculate the limits within which the weight of the packets should lie assuming that the machine is not been classified as faulty.
in a particular occupation a random sample of 210 men found that 65 smoked. in a random sample of 240 women 87 smoke.
the data below are sales y in thousands of dollars per week for home improvement outlets in each of four cities. the
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