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Question: Dr. Patton is a Professor of English. Recently she counted the number of misspelled words in a group of student essays. She noted the distribution of misspelled words per essay followed the normal distribution with a standard deviation of 2.44 words per essay. For her Tuesday class of 40 students, the mean number of misspelled words per essay was 6.05. Construct a 95 percent confidence interval for the mean number of misspelled words in the population of student essays.
The mean life time of the sample of 160 tires will be less than 39,000 miles? Interpret the probability in terms of the truth of the manufacturer's claim.
Scientist does n ot believe that water ph is 7. She wants to test the null hypothesis that the true level of ph is 7 at the .05 significance level. Her alternative hypothesis is that the water does not have a ph of 7. Which p-value will she reject..
Particular cookie will have fewer than 5. What type of probability distribution will most likely be used to analyze the number of chocolate chips per cookie?
What is the level of measurement for the variable, "political ideology" measured as "Very Conservative", "Conservative","Moderate", "Liberal" and "Very Liberal".
A better case can be made that observation 13 (Los Arboles) is an outlier. Describe what this means in plain terms.
From the shipment you take a random sample of 20. When sampling with replacement (binomial), determine the probability of obtaining: Exactly two defective components in the sample of 20.
At a national seashore, the number of swimmers per day who require lifeguard assistance averages 4.1, on any day when 7 or more swimmers are assisted, the lifeguards receive a $20 bonus for extra effort.
How do you use these three levels in relationship to evaluate risk to patients in implementing the decisions based on research findings?
What is the standard general score conversion formula? Is this the same as a z-score formula? Which leads me to ask How do you convert from one standard score to another?
Below are bowling scores for several UMUC statistics professors. Based on output from ANOVA, who is the better bowler (for those of you who don't bowl, a numerically higher score indicates a better score)?
Derive the formula for the expected value Y, derive the formula for the moment generating function of Y
Specify the appropriate null and alternative hypotheses if we wish to test the research hypothesis that the mean GHQ score for all employed men exceeds 10.
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