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Question: This problem will give you practice in constructing confidence intervals and in discovering how to reduce their size (without sacrificing confidence). Smaller confidence intervals tell you the value of μ more precisely.
a. How wide is the 95 percent confidence interval about a sample mean when s^ = 4 and N = 4?
b. How much smaller is the 95 percent confidence interval about a sample mean when N is increased fourfold to 16 ( remains 4)?
c. Compared to your answer in part a, how much smaller is the 95 percent confidence interval about a sample mean when N remains 4 and s^ is reduced to 2?
the top nine scores on a test are as follows24 28 30 37 44 49 49 53 63please find the standard deviation and show your
Discuss the actions a virtual team leader can take to reduce the possibility of team failure. Support your choices of actions with an appropriate rationale and cite references to support your answer.
hw5 logistic regression1. nbspmarentette and el-masri 2011 used logistic regression to identify predictors of obtaining
Ms Lisa is the budget director for the New Process Company. She would like to compare the daily travel expenses for the sales staff and the audit staff. She collected the following sample info:
A large auto body shop records the odometer readings from its customers. The distribution of miles driven per year of all of their customers has a mean of 14,000 miles and a standard deviation of 4000. If we take an SRS of 12 cars, what is the pro..
the following data were collected for a test of linear correlation and spearmans rank correlation was used2.2 3.3 3.3
make a decision about the given claims. use only the rare event rule stated in section 8-2 and make subjective
Point to at least two directional and nondirectional hypotheses you would like to test associating either to your current job or job you would like to do after graduation.
Choose any Statistic business problem and develop a problem statement which can be addressed with survey research. Prepare a 10-13 question survey to collect primary data regarding your selected problem statement.
The smallest quantity in a cell is minus 35, but two different cells with minus signs have 35 units in them. What problem will this cause and how should this difficulty be resolved?
The weight of football players is normally distributed with a mean of 200 pounds and a standard deviation of 25 pounds.
Using the Hypothesis Tests Two Sample file and a .05 significance level, test whether there is a difference in the mean salary for men versus women.
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