6. (Ref c-e) If Statistics test scores were normally distributed with a mean a 81 and a standard deviation of 5, find the following probabilities a) That a randomly selected student scored 75 or less: b) That a randomly selected student scored above a 93, an A: c) That a randomly selected student scored between 77 and 84, a C: M

6. (Ref c-e) If Statistics test scores were normally distributed with a mean a 81 and a standard deviation of 5, find the following probabilities a) That a randomly selected student scored 75 or less: b) That a randomly selected student scored above a 93, an A: c) That a randomly selected student scored between 77 and 84, a C: M

Name: nihq.com/web/viewer.html?file=https%3A%2F%2Fpagecounty.schoology.com%
Uploaded: 2024-03-20T07:06:16.000Z
Channel: Bartleby
Description: nihq.com/web/viewer.html?file=https%3A%2F%2Fpagecounty.schoology.com%2Fattachment%2F1752385330%2Fsource%n Project .0A My Drive»Normal Curve assign.pdf- +1006. (Ref c-e) If Statistics test scores were normally distributed with a mean a81 and a standa

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Suppose that the middle 95% of score on a statistics final fall between 60.67 and 90.75. Give an approximate estimate of the standard deviation of scores. Assume the scores have a normal distribution. Question 7 options: 1) 15.04 2) 75.71 3) 3.76 4) -7.52 5) 7.52
Answer A B C and please follow the instructions
Suppose the time to complete a race for a particular age group are normally distributed with a mean of 27.2 minutes and a standard deviation of 3.3 minutes. Find the times that corresponds to the following z- scores. Round your answer to 3 decimals. a. Runner 1: z = 0.39, time b. Runner 2: z = – 1.61, time = Is Runner 1 faster than average, slower than average, or exactly average? O Faster than Average c. Slower than Average O Exactly Average Is Runner 2 faster than average, slower than average, or exactly average? d. OFaster than Average O Slower than Average Exactly Average Add Work
Suppose that the number of points scored in a game comes from a normal population with an average of 12 points and a standard deviation of 9 points. Estimate the chance that the average points scored in ten randomly selected games will exceed 14.2 points. A. 0.4034 B. 0.0073 C. 0.2198 D. 0.2297
Fifteen randomly selected college students were asked to state the number of hours they slept the night before. The resulting data are: 6 16 7 8 7 796 3 11 9 15 4 7 9 a) Find the mean. b) Find the median. c) Find the standard deviation. d) According to Chebysev's Theorem, at least 75% of the times will fall between what two amounts? Is the theorem accurate for this set of data? Why of Why not? e) Are any of the reported hours "unusually" high? Are any of the reported hours unusually low?
The test scores in a certain statistics class are normally distributed with a mean of 76 and a standard deviation of 5. a.) Use the Empirical Rule to estimate the percentage of students who scored between 66 and 86 points. b.) Compute the z-score for a test score of 79 points. a. 0.97 b. 0.6 C. -0.6 d. -0.97 c.) What proportion of the scores were below 79 points? a. 0.7257 b. 0.834 c. 0.2743 d. 0.166
Consider the following data set. You may assume that the mean of this data set is x¯ = 7. 8 10 3 5 7 5 11 a) Find the range of the data set. b) Find the standard deviation of the data set. c) How many of the seven data points lie within one standard deviation of the mean?
Suppose the scores on an exam have a mean of 70 with a standard deviation of 10. If one student hasa test result with a z-score of -0.8 and a second student has a test result with a Z-score of 1.8, how many points higher was the second student's score than that of the first? O a. 10 O b. 20 O c. 2.6 O d. 13 O e. 26
The mean age of all 663 used cars for sale in a newspaper one Saturday last month was 7.5 years, with a standard deviation of7.1 years. The distribution ads, a reporter randomly selects 50 of these used cars and plans to visit each owner to inspect the cars. He finds that the mean age of the 50 cars he sam Complete parts a through c. a From the problem statement, which of the values 75,7.1, 7.9, and 5.6 are parameters and which are statistics? The value 7.5 is a The value 7.1 is a The value 7.9 is a The value 5.6 is a
Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest speed measured was 71.7 Mbps. The complete list of 50 data speeds has a mean of x = 15.45 Mbps and a standard deviation of s = 21.16 Mbps. a. What is the difference between carrier's highest data speed and the mean of all 50 data speeds? b. How many standard deviations is that [the difference found in part (a)]? c. Convert the carrier's highest data speed to az score. d. If we consider data speeds that convert to z scores between -2 and 2 to be neither significantly low nor significantly high, is the carrier's highest data speed significant? a. The difference is Mbps. (Type an integer or a decimal. Do not round.)
From a sample with n = 12, the mean number of televisions per household is 2 with a standard deviation of 1 television. Using Chebychev's Theorem, determine at least how many of the households have between 0 and 4 televisions. At least of the households have between 0 and 4 televisions. (Simplify your answer.)
A set of final examination grades in an introductory statistics course was found to be normally distributed with a mean of 73 and a standard deviation of 8. Calculate: a.the percentage of students scored between 75 and 90 ( using Rstudio) b.the test score higher than what grade if only 5% of the students taking the test (manually and using R studio)