In a Statistics course, the professor uses the following grading policy: the bottom 5% of students receive an F, the next 10% receive a D, the next 40% receive a C, the next 30% receive a B, and the rest receive an A. Assume students' grades are normally distributed with a mean of 70 and a standard deviation of 10.a. Draw the distribution with the cut-off scores for each letter grade (A/B, B/C, C/D, D/F).b. Find the probability that a randomly selected student gets an 80 or better? i. First attempt to integrate the PDF. (Hint: Recall the Gaussian integral identity). ii. Standardize to find the probability.c. Probability that a student scores between 60 and 75. i. First attempt to integrate the PDF. (Hint: Recall the Gaussian integral identity). ii. Standardize to find the probability.

Given that b .Find the probability that a randomly selected student gets an 80 or better? c.…

Answered: In a Statistics course the professor…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Use the properties of the mean and median to determine which are the correct mean and median for the following histogram. Relative Frequency 0.05 0.10 0.15 0.20 0.25 0.30 1 2 3 4 5 6 7 8 9 0 Choose the correct answer. Mean is 4.2 and median is 4.5 . Mean is 5.1 and median is 2.1 . Mean is 2.4 and median is 2.6 . Mean is 4.1 and median is 4.6 .
can be considered as the mid point of the distribution. Select one: a. mode b. none of these C. mean d. median
On the first day of class, a statistics professor asked her students to report their grade point averages (GPAs) as part of a class survey. For those students who knew their GPAs, the histogram was: The distribution is:
Find the median and lower quartile of the number of wins of the Mariners for 6 years. Years and wins below: 2010/2011/2012/2013/2014/2015 71 61 72 86 89 95 A) Find the median. Show work. B) Find the lower quartile. Show work.
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Over the first five years of owning her car, Gina drove about 12,700 miles the first year, 15,478 miles the second year, 12,675 the third year, 11,850 the fourth year, and 13,075 the fifth year. a. Find the mean, median, and mode of this data. b. Explain which measure of central tendency will best predict how many miles Gina will drive in the sixth year. a. mean= 12,700; median= 13,156; no mode; the mean is the best choice because it is representative of the entire data set. b. mean= 13,156; median= 12,700; mode= 3,628; the median is the best choice because it is not skewed by the high outlier. c. mean= 13,156; median= 12,700; no mode; the mean is the best choice because it is representative of the entire data set. d. mean= 13,156; median= 12,700; no mode; the median is the best choice because it is not skewed by the high outlier.
Here are the weights (in pounds) of 20 teens on an experimental food diet. 174, 142, 131, 145, 175, 150, 176, 151, 110, 162, 133, 163, 135, 178, 178, 154, 166, 146, 156, 167 What is the mean of the data?
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Ms. Lorraine Finch, a fifth grade teacher has a large class of 50 students for the 2018 - 2019 school year. After giving a reading comprehension test, Ms. Finch decided to do a brief statistical analysis. A frequency distribution of the results is presented below. a. Fill in the missing pa rts of Ms. Finch’s frequency distribution. Do any necessary scrap work in the space next to the table. b. Construct a histogram of the frequency distribution. c Is the distribution of test scores normal? Explain. Score Frequency Relative Frequency 84 2 0.04 85 5 0.1 86 0.08 87 8 0.16 88 10 89 90 5 0.1 91 4 0.08 92 3 0.06

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