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A small New England college has a total of 400 students.The Math SAT is required for admission, and the mean score of all 400 students is 620.The population standard deviation is found to be 60. The formula for a 95% confidence interval yields the interval 640 ± 5.88. Determine whether each of the following statements is true or false.
If we repeated this procedure many, many times, only 5 percent of the 95 percent confidence intervals would fail to include the mean Math SAT score of the population of all students at this college.
Construct a 99% confidence interval for the population mean tread wear for this type of tire.
A better case can be made that observation 13 (Los Arboles) is an outlier. Describe what this means in plain terms.
An advisory group decided to investigate this claim, believing it was too large. A sample of 200 traffic accidents this year showed 74 persons were also involved in another accident within the last five years. Use the 0.01 significance level. Show..
Calculate the value of chi-square. What is your decision regarding H 0 ?
For the data shown below, prepare a x-bar chart. Note that the sample size is three. Record the values for the UCL, center line, and LCL. In addition, note any points that are out of control.
Given the following data on hotel check-ins for a 6-month period:
Examine the behaviour of 99% critical values for these degrees of freedom, and comment on the limits in this case.
Assume that you choose a 50 families sample. Which is the form expected from the distribution of the average or median of the sample?
Can we conclude a difference in voting patterns for men vs. women? YES or NO (circle one)
The significance level of a statistical test is equal to the probability that the null hypothesis is true.
What type of error would result in that case? Respond to at least two of your classmate's postings.
Compute mean x and standard deviation s of data above. Calculate Ho by using traditional/classical method.
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