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Question: A sample of 837 ninth-grade girls was asked how much time they spent watching music videos each week. The girls also were asked to rate how concerned they were about their weight on a scale of 0 to 100 (100 = extremely concerned) as well as to rate their perception of how important appearance is on a scale of 1 to 6 (6 = very important). The researchers (Borzekowski et al., 2000) wrote the following about the results: "When media use was separated into distinct media genres, only hours of watching music videos was related to perceived importance of appearance and weight concerns (r = .12, p)
a. What are the null and alternative hypotheses for which p-values are given in the researchers' statement?
b. What conclusions have the researchers made about the hypotheses you gave in part (a)?
For this assignment you will research and report on things happening outside the U.S. relative to many of the issues we have covered in this class. Compare and contrast U.S. and global companies doing business around the world and their behaviors ..
What is the probability that the shipment will be rejected? If the retailer inspects 6 of the CD shipment what is the probability that the shipment will be accepted?
Create a real-world situation or problem that could be addressed using an independent- or related-samples t test. Create this situation or problem, that clearly identify the independent and dependent variables to study
Two types of valves are being tested to determine if there is a difference in pressure tolerances. Fifteen out of a random sample of 100 of Valve A cracked.
A random sample of 120 traveling business people indicates that 28 may be interested in purchasing the portable fitness equipment. Give a 95% confidence interval for the proportion of all traveling business people who may be interested in the prod..
Starbucks is leveraging mobile phones to drive sales and improve its much-vaunted loyalty program. In December 2011, the company disclosed that it had successfully handled 26 million transactions via its new mobile payment system, which allows sma..
(a) Obtain a 99% con?dence interval for the variance σ2. (b) Is it reasonable to assume that the data follow a normal distribution?
What are the possible combinations of coins that Sanjay could have received in change?
Calculate the cost per unit of each product using the activity-based costing method.- Discuss the unit costs calculated using these two methods.
a producer of a cartain type of electronic component ships to suppliers in lots of twenty. suppose that 60 of all such
In the boom years of the late 1990s, it was often said that rapidly increasing stock prices were responsible for much of the rapid growth of real GDP. Explain how this could be true, using aggregate demand and aggregate supply analysis
state the hypotheses and identify the claim. compute the test value At a = 0.05, decide if there is enough evidence to reject the claim of no difference in the ages fo the two groups. Compute and use the standard deviations from the samples.
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