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A sample of 64 statistics students at a small college had a mean mathematics ACT score of 28 with a standard deviation of 4. Estimate the mean mathematics ACT score for all statistics students at this college. Give the 95% confidence interval.
A coin is flipped e times and heads (h) or tails (t) are recorded:
Use your calculator to find the mean and standard deviation for the 9 observations that remain when you leave out the outlier. How does the outlier affect the values of x and s? Is s a resistant measure of spread?
Create a 90% confidence interval for proportion of all kernels that would not pop.
At the end of class, our teacher said "If you're perceptive, you may have noticed that a regression analysis produced by the Excel Data Analysis ToolPak contains an ANOVA table.
One advantage of the repeated measures ANOVA is that it eliminates "individual differences" as a source of variability. Explain why there are no individual differences in the numerator and in the denominator of the F ratio.
This problem has to do with graphical plotting and computation for certain distribution. Please mention a detailed response to the questions listed with appropriate graphical and statistical data representation(s).
Box 1 has 3 chips numbered 1,2,3. Box 2 has 2 chips numbered 1 and 2. Suppose a chip is randomly selected from box 1 and placed in box 2.
What is the probability that the first two cards dealt yields "Black Jack"?
If the lowest score you can earn and still be eligible for employment is an 84, what is the mean score for the exam? Round your answer to the nearest tenth.
By how much does the standard error of x-bar change if the sample is increased to 100?
Hypothesis testing of single mean - The Wall Street Journal reported that the 30-year mortgage rate is now less than 6%.
What is the Bonferroni adjustment? What would the Bonferroni adjustment be for a study with four groups for which a researcher decided to use t-tests?
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