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?
(c) What SAT score do you need to have to be in the top 15% of the population?
(d) What is the probability of scoring between 500 and 650 on the SAT?
(e) What is your percentile rank if you have an ACT of 25.5?
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...
A college admissions office needs to compare scores of students that take the SAT with those who take the The college applicants who took the SAT, had a mean of 1020 and a standard deviation of 194. Those who The college applicants who took the ACT, had a mean 21 and a standard deviation of 5.4. D C Applicant SAT ACT X z-score = X 950 1320 19 28 284 2 132-1o2 17 Calculate the standardized z-score for Applicant A...
Scores on the SAT mathematics section have a normal distribution with mean 4-500 and standard deviation o=100. a. What proportion of students score above a 550 on the SAT mathematics section? Round your answer to 4 decimal places. b. Suppose that you choose a simple random sample of 16 students who took the SAT mathematics section and find the sample mean x of their scores. Which of the following best describes what you would expect? The sample mean will be...
Students across the U.S. take the ACT test, which has scores that are normally distributed with a mean of 21 with a standard deviation of 5. If 250 students are randomly selected, what is the probability that at least 15 of them will score a 29 or better? A small college has an entering freshmen class of 600 students. Of these, 240 have brought their own personal computers to campus. A random sample of 110 entering freshmen was taken. What...
On a test at Microsoft, which has a mean of 500 and a standard deviation of 100, only the top 2% of the test takers will get an interview with Bill Gates. What score or better will they have to earn on this test to get the interview? Please show the work. I can use excel so if you could explain how to do it in there, that would be even better! :)
(Multiple part question) The following normal curve represents scores from a population on a test of musical ability. The population mean of the test is µ=60. The population standard deviation of the test is σ=14. a. What proportion (not percentage) of people have scores above 69 (rounded to four decimals) given that a z score for 69 = 0.64? b. What proportion (not percentage) of people have scores below 43 (rounded to four decimals) given that a z score for...
The scores on a Statistics exam are normally distributed with a mean 75 with a standard deviation of 5. If nine students are randomly selected what is the probability that their mean score is greater than 68. (a) .0808 (b) -.4000 (c) .9192 (d) .0001 (e) .9999 29. Refer to question 28. Suppose that students with the lowest 10% of scores are placed on academic probation, what is the cutoff score to avoid being placed on academic probation? (a) >...
i need help on question 3 to 22 please. Midterm ex review. MATH 101 Use the following information to answer the next four exercises. The midterm grades on a chemistry exam, graded on a scale of 0 to 100, were: 62, 64, 65, 65, 68, 70, 72, 72, 74, 75, 75, 75, 76,78, 78, 81, 82, 83, 84, 85, 87, 88, 92, 95, 98, 98, 100, 100,740 1. Do you see any outliers in this data? If so, how would...
Please attempt at problem dealing in Chi-Square (Goodness of Fit). Thank you 006Chapter 22 Exercise employment has acualy increased in the past 3 years, or whether the change in empleymens can be explained by random puecruations: What is a Type I error in this case? Whar is a Tipe Il error? 22.8.10 Imagine you are performing a statistical test to determine i Exercise 22.8.1 Sappose someone is trying to sell you a coin that favors heads. You snwch a cotm,...
Use SPSS for this exam, be sure to include all the following information to get full credits: (1) null and alternative hypotheses (15%) (2) nameofthe test(15%, explain why you chose it) (3) thetest statistic and its degree offreedom or ANOVAtable(if applicable) (30%! (4) p-value (15%), and (5) scientific conclusion (25%, using 0.05 significance). 1. Ostriches live in hot environments, and they are normally exposed to the sun for long periods Mammals in similar environments have special mechanisms for reducing the...
You are curious about the average number of yards Matthew Stafford throws for each game for the Detroit Lions. You randomly select 23 games and see that the average yards per game is 344.5 with a standard deviation of 27.8 yards. You want to create a 95% confidence interval for the true average number of yards per game he throws. What is the margin of error for this estimate? Question 1 options: 1) 1.5833 2) 5.7967 3) 12.0216 4) 9.9538...