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Question 3 A researcher wanted to analyse the scores of a particular course at SUSS. The grades follow a normal distribution with mean = 67.97, and standard deviation = 11.5. Round all answers to two decimal places. Calculate the percentage of students who scored more than 70 in this exam for this entire cohort. (b) If 12% of the cohort were given A's, compute the lowest possible A grade. (c) A random tutorial group of 30 students was selected. The students' grades are shown in Table Q3. Do you see anything unusual about the grades of this class? Please give your reasons.

Question 3 A researcher wanted to analyse the scores of a particular course at SUSS. The grades follow a normal distribution with mean = 67.97, and standard deviation = 11.5. Round all answers to two decimal places. Calculate the percentage of students who scored more than 70 in this exam for this entire cohort. (b) If 12% of the cohort were given A's, compute the lowest possible A grade. (c) A random tutorial group of 30 students was selected. The students' grades are shown in Table Q3. Do you see anything unusual about the grades of this class? Please give your reasons.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
Problem 22SGR
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Question 3 A researcher wanted to analyse the scores of a particular course at SUSS. The grades follow a normal distribution with mean u = 67.97, and standard deviation = 11.5. Round all answers to two decimal places. (a) Calculate the percentage of students who scored more than 70 in this exam for this entire cohort. (b) If 12% of the cohort were given A's, compute the lowest possible A grade. (c) A random tutorial group of 30 students was selected. The students' grades are shown in Table Q3. Do you see anything unusual about the grades of this class? Please give your reasons.
Transcribed Image Text:Question 3 A researcher wanted to analyse the scores of a particular course at SUSS. The grades follow a normal distribution with mean u = 67.97, and standard deviation = 11.5. Round all answers to two decimal places. (a) Calculate the percentage of students who scored more than 70 in this exam for this entire cohort. (b) If 12% of the cohort were given A's, compute the lowest possible A grade. (c) A random tutorial group of 30 students was selected. The students' grades are shown in Table Q3. Do you see anything unusual about the grades of this class? Please give your reasons.
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