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The scores for the SAT are normally distributed. The mean score on the math section is 520 with a standard deviation of 50. What score do you need to be in the top 20%?
Suppose that the scores of architects on a particular creativity test are normally distributed. What percentage of architects have Z scores (a) above .10, (b) below 10, (c) above .20, (d) below .20, (e) above 1.10, (f) below 1.10, (g) above -.10, (h)..
a researcher hypothesizes that the variation in the amount of money spent on business dinners is greater than the
A macroeconomist suggests that, since aggregate output and employment have decreased, the government should increase expenditures on goods
Baseball tickets Suppose you want to know the average amount of money spent by the fans attending opening day for the Cleveland Indians baseball season.
in a past election the voter turnout was 51. in a survey 843 subjects were asked if they voted in the election. find
At one hospital, 674 women were diagnosed with breast cancer. Five years later, 88% of the Caucasian women and 83% of the African American women were
in a test of the hypothesis that alcohol consumotion affects reaction time a reasearcher reports that an alpha lever
Find the critical t alpha/2 assuming the population is normally distributed, the confidence level is 95%, n=101 and sigma is unknown.
Assume all of the other variables to do the calculation of confidence interval held constant.
Compose an example reply to that user. the 1st part in understand but coming up with the scenario is what throwing me off
The interquartile range and the standard deviation are two different measures of spread. Which measure do you think is more affected by outliers? Explain.
Use a graphical technique to compare the ages, household incomes, and education of the five groups of car buyers. (Do not use Box plots or Stem-and-Leaf Display).
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