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Scores by women on the SAT-I test are normally distributed with a mean of 998 and a standard deviation of 202. Scores by women on the ACT test are normally distributed with a mean of 20.9 and a standard deviation of 4.6. Assume that the two tests use different scales to measure the same aptitude.
a. If a women gets a SAT score that is the 67th percentile, find her actual SAT score and her equivalent ACT score
b. If a woman gets a SAT score of 1220, find her equivalent ACT score.
Suppose you found that in doing the hypothesis test, you were able to reject the null hypothesis. What is the most appropriate conclusion to draw?
Determine the probability that a randomly selected exam will have a score of at least 71? What percentage of exams will have scores between 89 and 92?
Recognize and describe potential threats (up to 3) to internal validity.
A random sample of 16 ages is drawn from the population, and we find the sample mean of these observations to be μ = 8.76. What is the value of the test statistic?
Following sample data shows the weekly closing price of ABC stock. Compute the sample mean and variance from this data set.
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
Two t-curves have degrees of freedom 12 and 20, respectively. Which one more closely resembles the standard normal curve? Explain your answer.
Compute the incidence proportion or the risk ratio that compares group 1 to group 0, and compute the Incidence proportion or the risk ratio which compares group 2 to group 0. Then post a summary of your findings.
In 2010, the average age of students at UTC was 22 with a standard deviation of 3.96. In 2013, the average age was 24 with a standard deviation of 4.08. In which year do the ages show a more dispersed distribution? Show your complete work and supp..
Crete a 90% confidence interval for mean Secchi dish measurement.
Multiple choices based on regression analysis - the percentage of variation in the dependent variable explained by the variation in the independent variable
According to the Scranton Edison Company, utility-plant investment per employee was approximately $453,300; $492,400; $498,900; $531,900; $553,900;
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