TOPIC:Use of the Normal distribution and use of continuity correction.
0/2 pts Question 3 On a certain standardized test . The mean is 54 .The standard deviation is 10 .Scores are whole numbers . Connie scored 34 Find numbers a and c such that Connie scored higher than...
In a recent year, the total scores for a certain standardized test were normally distributed, with a mean of 500 and a standard deviation of 10.4. Find the probability that a randomly selected medical student who took the test had a total score that was more than 530. The probability that a randomly selected medical student who took the test had a total score that was more than 530 is _______
In a recent year, the total scores for a certain standardized test were normally distributed, with a mean of 500 and a standard deviation of 10.6. Find the probability that a randomly selected medical student who took the test had a total score that was more than 529. The probability that a randomly selected medical student who took the test had a total score that was more than 529 is _______
2a-b 2. A fifth grader takes a standardized achievement test (mean = 125, standard deviation = 15) and scores a 148 a. Draw and label a normal curve using the mean and standard deviation, b. What percent scored higher than the fifth grader?
(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?...
In a recent year, the total scores for a certain standardized test were normally distributed, with a mean of 500 and a standard deviation of 10.5. Answer parts (a)-(d) below. (a) Find the probability that a randomly selected medical student who took the test had a total score that was less than 490. (Round to four decimal places as needed.) The probability that a randomly selected medical student who took the test had a total score that was less than 490 is 0.1704 (b)...
USE R COMMANDS PLEASE Exercise 1: Entry to a certain University is determined by a national test. The scores on this test are normally distributed with a mean of 520 and a standard deviation of 80. Use R commands to answers the following questions (a) Tom wants to be admitted to this university and he knows that he must score better than at least 75% of the students who took the test. Tom takes the test and scores 595. Will...
Suppose that composite scores on the ACT test for the school graduating class in a certain year had a mean of 24.2 and a standard deviation of 4.6. In all, 1,823,241 students in this class took the test, and of these, 6,947 had scores higher than 36.4 and 2,404 had scores exactly 36.4. ACT scores are always whole numbers, but the Normal N(24.2, 4.6) distribution can include any value, not just whole numbers. What is more, there is no area...
Suppose that composite scores on the ACT test for the school graduating class in a certain year had a mean of 24.2 and a standard deviation of 4.6. In all, 1,823,241 students in this class took the test, and of these, 6,947 had scores higher than 36.4 and 2,404 had scores exactly 36.4. ACT scores are always whole numbers, but the Normal N(24.2, 4.6) distribution can include any value, not just whole numbers. What is more, there is no area...
please answer all question 16-20 Question 16 2 pts The population mean for a standardized test is 250. A research study with N = 30 adults from Virginia had a mean score of 260, with a 95% confidence interval of the mean reported as [248, 272]. What decision should be made based on this confidence interval? o Run the hypothesis test again o Accept the research hypothesis o Reject the null hypothesis o Fail to reject the null hypothesis Question...
13. +-6.66 points WaneFMAC7 9.5.033. My Notes IQ scores (as measured by the Stanford-Binet intelligence test) in a certain country are normally distributed with a mean of 100 and a standard deviation of 11. Find the approximate number of people in the country (assuming a total population of 323,000,000) with an IQ higher than 120. (Round your answer to the nearest hundred thousand.) people 14. 0/6.66 points | Previous Answers My Notes This exercise uses the normal probability density function...