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A teacher was interested in knowing if leadership ability was correlated with attractiveness in third graders. The teacher ranked a group of students for leadership ability and had another teacher rank the same children on attractiveness.
What correlation coefficient is appropriate for this type of data?
If the sample standard deviation of the population is 900 (s=900), how do you find the 95% confidence interval of the mean for all the students.
You own a Pepsi bottling plant and you are concerned about filling the bottles to the correct level.
Write the equation of the regression line.- Estimate the Average Attendance for a team with 50 Wins.- Interpret the meaning of the slope of the regression line in this context.
In your opinion does one do a better job or representing the proportion of the area under the standard curve?
find out whether there is a difference in the mean sales for cola stacked at the four locations in the stores. Use the .05 Significance level
Suppose that a computer manufacturer receives computer boards in lots of five. Two boards are selected from each lot for inspection. We can represent possible outcomes of the selection process by pairs. For example, the pair (1,2) represents the s..
A stock price is $30, the expected return is 18% per annum and the volatility is 20% per annum. What is the mean of the logarithm of the stock price in two years?
Develop a 95% confidence interval estimate of the mean amount spent per day by a family of four visiting Niagara Falls (to 2 decimals).
A human resources director, on learning about the regression effect, decides to hire people who have been fired by their previous employer for poor performance.
Compute simple main effect tests for the type of adult factor at each level of the consequences factor. Use Tukey's HSD to analyze the significant.
Research assistants are to score and enter the responses into the computer as soon as they are received. You are to conduct a statistical analysis of the data.
If the population standard deviation is known, but the sample size is less than 30, what assumption is necessary to use the z-statistic in carrying out a hypothesis test for the population mean?
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