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A researcher measures the relationship between Internet use (hours per week) and social interaction (hours per week) in a sample of 10 students. The following table lists the hypothetical results of this study.
Internet Use Social Interaction
X Y 6 4 8 7 6 7 8 7 11 6 3 8 4 2 6 5 3 10 11 2
(a) Compute the Pearson correlation coefficient. (Round your answer to three decimal places.)
(b) Compute the coefficient of determination. (Round your answer to three decimal places.)
(c) Using a two-tailed test at a 0.05 level of significance, state the decision to retain or reject the null hypothesis.
Retain the null hypothesis.
Reject the null hypothesis.
Using a .05 level of significance, test the hypothesis that there is no difference between the starting annual salaries of public accountants and financial planners. What is your conclusion?
Identify the purpose of the paper, the common research issue, and the corresponding statistical test in your opening paragraph
the ages and heights of a sample of child smokers were taken. the average age was 13.5 years with an sd of 2.3 years.
Using the tables in the textbook find the critical value from the Studentized range distribution for H0: µ1 = µ2 = µ3 = µ4 = µ5, with n = 35 at a = 0.01.
In the following stem-and-leaf display for a set of two-digit integers, the stem is the 10's digit, and each leaf is the 1's digit. What is the original set of data?
how do i find fisher information matrix of n iid random variables x1... xn of a gamma distribution with parameter alpha
in determining the range of an acoustic source by triangulation one must accurately measure the time at which the
A microchip manufacturer selects 400 chips at random from a large production run for quality testing. Let phat be the proportion of chips in this sample
The mean life time of the sample of 160 tires will be less than 39,000 miles? Interpret the probability in terms of the truth of the manufacturer's claim.
In 2007, the United States had 1.5 million homeschooled students, according to the U.S. National Center for Education Statistics.
Is there any evidence to suggest that the true mean length of lionfish in this area near Fort Lauderdale is greater than 13.5 inches? Use a = 0.01 and assume the underlying population is normal.
What is the area under the appropriate density curve over the range from 0 to 50 inches? What probability does it represent?
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