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For a population with a mean equal to 200 and a standard deviation equal to 25, calculate the standard error of the mean for the following sample sizes.
?a) 10
?b) 30
c) 50
?a) The standard error of the mean for a sample size of 10 is _____
?(Round to two decimal places as? needed.)
?b) The standard error of the mean for a sample size of 30 is ___
c) The standard error of the mean for a sample size of 50 is ____
People were polled on how many books they read the previous year. How many subject are needed to estimate the number of books read the previous year within one book with 99% confidence?
Test the teachers hypothesis that there is a significant difference between the pre and post tests.
a. Is there a statistically significant relationship between these variables?
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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..
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a report announced that the median sales price of new houses sold one year was 211000 and the mean sales price was
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