Certain standardized math exams have a mean of 100 and a standard deviation of 60. Of a sample of 36 students who take this exam, what percent could you expect to score between 80 and 90?
Certain standardized math exams have a mean of 100 and a standard deviation of 60. Of a sample of 36 students who take this exam, what percent could you expect to score between 80 and 90?
Show all work please 1. Certain standardized math exams have a mean of 100 and a standard deviation of 60. Of a sample of 36 students who take this exam, what percent could you expect to score between 100 and 120? A)50 B)47.5 C)97.5 D)49.85 2.Certain standardized math exams have a mean of 100 and a standard deviation of 60. Of a sample of 36 students who take this exam, what percent could you expect to score above 120? A)2.5...
The mean SAT math score in 2007 was 525 with a standard deviation of 114. An educational psychologist believes that students who take at least 4 years of English classes in High School score better on the SAT math exam. The psychologist obtains a random sample of 40 high school students who completed at least 4 years of high school English classes. The mean math exam score of these students was 540. Conduct an appropriate hypothesis test at the Alpha...
QUESTION 20 The mean score on a standardized exam is 320 with a standard deviation of 40. Suppose 100 scores are randomly selected and you need to determine the probability that the sample mean is less than 310. Calculate the z-score necessary to do this 0.25 2.50 -2.50 -0.25
Historically, students who take OSCM 5510 have a mean score of 85 and a standard deviation of 8. A random sample of 25 OSCM 5510 students is selected. The expected value and the standard deviation of their average score are a. 25 and 1.6 b. 85 and 1.6 c. 25 and 8 d. 85 and 8
Students taking a standardized IQ test had a mean score of 100 with a standard deviation of 15. What is the lowest score that would still place a student in the top 15%?
Do students tend to improve their Math SAT scores the second time they take the test? We take a random sample of 100 hundred students who took the test twice. The mean score and the standard deviation of these 100 students on the first try are 500 and 90 respectively; the mean score and the standard deviation of these 100 students on the second try are 530 and 92 respectively. We also examine the change in Math SAT score (second...
(2 points) For students in a certain region, scores of students on a standardized test approximately follow a normal distribution with mean u = 543.4 and standard deviation o = 26.9. In completing the parts below, you should use the normal curve area table that is included in your formula packet. (a) What is the probability that a single randomly selected student from among all those in region who took the exam will have a score of 548 or higher?...
The mean exam score for 44 male high school students is 20.1 and the population standard deviation is 4.7. The mean exam score for 58 female high school students is 19.6 and the population standard deviation is 4.1. At a = 0.01, can you reject the claim that male and female high school students have equal exam scores? Complete parts (a) through (e). Click here to view page 1 of the standard normal distribution table. Click here to view page...
Assume the grades has Normal distribution with the mean of 70, and the standard deviation of 15. Answer the following questions 1. Calculate 10t 25t* 50 75t and 90* percentiles once by converting to the standard Normal distribution, and again directly (using the non-standard Normal distribution) 2. What percentage of students score between 80 and 90 in the exam? 3. What percentage of students fail? 4. What percentage of students pass with A? 5. Generate a sample of size 16...
ROUND to 3 decimal places
Type numbers in the boxes. Estimating Mean SAT Math Score ay Part 1: 5 points The SAT is the most widely used college admission exam. (Most community ay Part 2: 5 points colleges do not require students to take this exam.) The mean SAT math score varies by state and by year, so the value of u depends on the state and the year. 10 points But let's assume that the shape and spread of...