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In a recent study of 35 ninth-grade students, the mean number of hours per week that they played video games was 16.6. The standard deviation of the population was 2.8. a. Find the best point of estimate of the population mean b. Find the 95% confidence level of the mean of the time playing video games c. Find the 99% confidence interval of the mean time playing video games d. Which is larger? Explain why.
Determine whether the following situations represent a right, left or two-tailed test: In 1997, 43% of Americans 18 years or older participated in some form of charity work.
In answering this questions, set up and test appropriate hypotheses using D = 0.01. Construct a 99 percent confidence interval on the true mean difference in breaking strength.
in case of emergency i need a fully charged battery for my flashlight. i find many batteries that i bought one year
the national freshman-to-sophomore retention rate has held steady at 74. a certain college has 499 of the 585 freshman
What is the expected number of customers that will have to wait more than 6 hours?
The entire batch will be rejected if at least one of those tested is defective. What is the probability that the entire batch will be rejected? Assume independence.
The test question was if this difference between the test statistics and the stated life of the battery was significant? The .05 significant level was selected for the test. Which is the correct statement?
nys lotterys pick 10 game you pick 10 integers between 1 and 80 including 1 and 80.nbspnbspthe state picks 20
Let x denote the total number of steps required to do the analysis (both procedures). Show the value of the random variable for each of the experimental outcomes.
A United Nations report shows the mean family income for Mexican migrants to the U.S.. is $27,000 per year. A FLOC evaluation of a sample 25 Mexican families units reveals a mean to be $30,000 with a sample standard deviation of $10,000.
Create the 90% confidence interval for mean score of all such subjects. You may suppose scores are usually distributed.
We wish to create this mean value interval for selling price with 95% confidence level. Find out the best point estimate (average) for selling price. Critical t-value(s) associated with 95% confidence level.
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