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Question: Give a reason why the data may differ? Would the sample size be large enough if the population is the students in the school? Would the sample size be large enough if the population is school-aged children and young adults in the United States? Researcher A concludes that most students play video games between four and six hours each week. Researcher B concludes that most students play video games between two and four hours each week. Who is correct?
Find the P-value for this test - What is the probability that this difference will be detected by the test described in part (a)?
A federal bank examiner is interest in estimating the mean outstanding defaulted loans balance of all defaulted loans over the last three years. Calculate a 90% confidence interval for the mean balance of defaulted loans over the past three years.
1. How did commerce at this stage of societal development influence the decisions/actions of governments? Some very specific results of these decisions influenced the circumstances we have today. Be sure to include additional links you consulted..
A recent study yielded a positive correlation between breast-fed babies and scores on a vocabulary test taken at age 6. Discuss the potential difficulties in interpreting the results of this study.
For the observations 21, 36, 42, 24, 25, 36, 35, 49, 32 verify that the sample variance and the sample Winsorized variance are s2 = 81 and Sw2 = 51.4, respectively.
Do these data suggest that the amount of time devoted to urban problems in acceptance speeches of newly elected representatives to the U.S. Congress differ according to whether they come from rural or urban districts?
Almost all bets made at gambling casinos favor the house. In other words, the difference between the amount bet and the mean of the distribution of the payoff is a positive number.
Of those who made no purchase, 201 were happy with the service and 221 were not. Use probability rules (when appropriate) to find the probability that a shopper made a purchase.
according to experian the population of consumer credit card holders carries an average credit card balance of 5500
one key risk factor for type ii diabetes is obesity and the cdc defines obesity as having a body mass index bmi of 30
What is the probability that at least 45 U.S. adults think PACs have too much power?- What is the probability that between 38 and 42 (inclusive) U.S. adults think PACs have too much power?
The lengths of 225 fish caught in Lake Michigan had a mean of 15.0 inches. Assume that the population standard deviation is 2.5 inches.
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