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The IQ scores are normally distributed with a mean of 100 and a standard deviation of 15.
1. What is the probability that a random person has an IQ between 85 and 115?
2. Find the 90th percentile of the IQ distribution.
3. If a random sample of 100 people is selected, what is the standard deviation of the sample mean?
Standard deviation was increased to 40, determine the overall effect on their society? Would this change be a good thing?
On average a certain intersection results in 3 traffic accidents per month. What is the probability that for any given month at this intersection
In this paragraph, be sure to make it clear how you handled the issue of conducting three planned comparisons. Also provide the ANOVA summary table for these results.
Conduct a hypothesis test using the .04 level of significance to determine if there is a difference between the population means.
Determine the completion time and standard deviation (σ) for project roundoff the standard deviation to the nearest hundredth: two decimal places.
In ANOVA, which of the following is not affected by whether or not the population means are equal?
Normal distribution of 5 pounds per square inch, standard deviation of 1.5 pounds per square inch, what proportion have less that 3.17 pounds per square inch, at least 3.6 pounds, are between 5 and 5.5 and 95% will be contained between what two va..
a) Test whether there is a difference between attitudes in the 2 cities. Use a 95% alpha. b) What does your result say about attitude consistency across cities?
Ethics The one-time fling! Have you ever purchased an article of clothing (dress, sports jacket, etc.), worn the item once to a party, and then returned the purchase?
Comment on their success or failure to meet this goal.
What is the probability of drawing two diamonds after discarding 5 and 7.
Compute the population attributable risk for smoking and lung cancer.
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