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If the results on a nationally administered introductory statistics exam is normally distributed with a mean of 100 points and a standard deviation of eight points determine the following: a. describe the graph of the distribution b. find at the Z score for a single exam that had 90 points then find the Z score for one with 118 points. C. If x represents a possible point-score on the exam find P(x<90). D. Find P(90<x<118) and give an interpretation of this value. E. What is the minimum number of points one must score on this exam if they want to be in the top 30% of all the scores
Which of the following formulas would you use to find the probability that a sample mean is larger than some given value? z = (x - µ) ÷ σ µ = ∑x ÷ N
How many turnstiles must be opened in each direction every morning and describe the suppositions underlying the solution of this problem by using queuing theory.
The sample average number of strokes being more than 5.0.
An investigator wants to estimate caffeine consumption in high school students. How many students would be required to estimate the proportion of students who consume coffee? Suppose we want the estimate to be within 5% of the true proportion with 95..
What is the calculated value of the test statistic to test for the difference of proportions of nonconforming bag weights, between the two filling lines?
As a manager of an organization, what statistics from this module would you use and why if you wanted to estimate your annual employee turnover? In your post, be sure to specifically identify the statistical formulas and what additional data you woul..
Carbon Monoxide (CO) is a colourless and odourless gas. Even at low levels of exposure, carbon monoxide can cause serious health problems. A home is considered safe if the mean CO concentration is 5.0 parts per million (ppm) or lower. We tak..
Foreign trade is important to the United States. No country exports and imports more. However, there has been a large trade imbalance in many sectors. To measure the extent of the prob- lem, an economist recorded the difference between exports and im..
The portfolio assets are inverted in the Dow Jones fund
Select the report of at least 2 polls taken on two different topics. (For example, the percent in favor versus opposed to abortion, the economy, a particular candidate, a certain product, etc. ) Various polls can be found at www.zogby.com or www.rasm..
The population proportion of Americans with diabetes is 9 percent (uc0u960 = 0.09). In repeated random samples of n = 800 Americans, 90% of sample proportions of people with diabetes would fall within______ from
question 1 variable xx lt- c3 4 8 4 2 1 0 6 variable yy lt- c1 2 4 2 2 0 1 4 calculate z-scores for all values in the
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