Sherlock and Watson both took a detective aptitude test for which µ= 500 and σ= 125....
- Sherlock and Watson both took a detective aptitude test for
which µ= 500 and σ= 125. (4 marks)
- Sherlock’s score was 800.
What is his Z score?
What proportion of the population would be expected to score higher? - Watson’s score was 475.
What is his Z score?
What percent of the population would be expected to score lower?
- Sherlock’s score was 800.
Homework Answers
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Sherlock and Watson both took a detective aptitude test for
which µ= 500 and σ= 125....
Us the following means and standard deviations: for ACT, µ=21, σ=3 and for SAT, µ=500, σ=100. (a) You take the ACT test...
Us the following means and standard deviations: for ACT, µ=21, σ=3 and for SAT, µ=500, σ=100. (a) You take the ACT test and the SAT test. You get a 24 on the ACT and a 660 on the SAT. The college that you apply to only needs one score. Which do you want to send them (that is, which score is better: 24 or 660)? Why? (b) What is the probability of having an ACT score of 20 or less?...
A group of high school seniors took a scholastic aptitude test. The resulting math scores had...
A group of high school seniors took a scholastic aptitude test. The resulting math scores had a mean 527.8 with a standard deviation of 177.8, verbal mean 505.5 with a standard deviation of 147.3, and the correlation between verbal and math scores was r=0.521. Complete parts a through f below. a) What is the correlation? The correlation is Round to three decimal places as needed.) b) Write the equation of the line of regression predicting verbal scores from math scores....
a) Approximately 500 students take a particular college statistics course each year. As an exercise, each...
a) Approximately 500 students take a particular college statistics course each year. As an exercise, each of the 500 students in the class is given a different random sample of the previous year's 500 final grades (in percentages) and asked to construct a 95% interval estimate of the previous year's overall average. Which of the following statements is correct? About 475 of the confidence intervals will contain the actual overall average for the previous year. It is probable that 475...
5-8 show work 5. 6. At a local high school 5000 juniors and seniors recently took...
5-8 show work
5. 6. At a local high school 5000 juniors and seniors recently took an aptitude test. The results of the exam were normally distributed with mean - 450 and o = 50. Calculate the following: a. The PERCENT of students to the nearest tenth of a percent that scored over 425 b. The number of students that scored more than 475 c. The probability of a student selected at random having scored between 400 and 575 A...
STA2221 examples on CI & Testing of Hypothesis Name MULTIPLE CHOICE. Choose the one alternative that...
STA2221 examples on CI & Testing of Hypothesis Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answer the question Provide an appropriate response. 1) Find the critical value,te for 0.99 and n-10. A) 3.250 B) 3.169 1.833 D) 2.262 2) Find the critical value to forc=0.95 and n=16. A) 2.947 B) 2.602 2120 D) 2.131 3) Find the value of E, the margin of error, for A) 1.69 B) 0.42 0.99, n=16 and s=2.6. C)...
A group of high school seniors took a scholastic aptitude test. The resulting math scores had a mean 527.8 with a standard deviation of 177.8, verbal mean 505.5 with a standard deviation of 147.3, and the correlation between verbal and math scores was r=0.521. Complete parts a through f below. a) What is the correlation? The correlation is Round to three decimal places as needed.) b) Write the equation of the line of regression predicting verbal scores from math scores....
a) Approximately 500 students take a particular college statistics course each year. As an exercise, each of the 500 students in the class is given a different random sample of the previous year's 500 final grades (in percentages) and asked to construct a 95% interval estimate of the previous year's overall average. Which of the following statements is correct? About 475 of the confidence intervals will contain the actual overall average for the previous year. It is probable that 475...
5-8 show work
5. 6. At a local high school 5000 juniors and seniors recently took an aptitude test. The results of the exam were normally distributed with mean - 450 and o = 50. Calculate the following: a. The PERCENT of students to the nearest tenth of a percent that scored over 425 b. The number of students that scored more than 475 c. The probability of a student selected at random having scored between 400 and 575 A...
STA2221 examples on CI & Testing of Hypothesis Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answer the question Provide an appropriate response. 1) Find the critical value,te for 0.99 and n-10. A) 3.250 B) 3.169 1.833 D) 2.262 2) Find the critical value to forc=0.95 and n=16. A) 2.947 B) 2.602 2120 D) 2.131 3) Find the value of E, the margin of error, for A) 1.69 B) 0.42 0.99, n=16 and s=2.6. C)...
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