Suppose that out of a class of size 32, 2 students received a grade of "A"....
Suppose that out of a class of size 32, 2 students received a grade of "A". The frequency of students receiving an "A" would be...
Homework Answers
Size of class = 32,
Two students received a grade of "A". That is grade "A" occurs two times.
Then the frequency of students receiving an "A" is 2.
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Suppose that out of a class of size 32, 2 students received a
grade of "A"....
1. Suppose in a class of 100 students who took an exam scored out of 100,...
1. Suppose in a class of 100 students who took an exam scored out of 100, the 68thpercentile of the exam scores was 72. Thus, _________% of the students who took the exam scored less than a 72. a.32% b.68% c.72% d.28% e.None of the above 2. Suppose in a class of 80 students who took an exam scored out of 100, the 40thpercentile of the exam scores was 58. Approximately how many of the 80 students scored above a...
Suppose for any class in a university, one expects 50% of the students to have grade...
Suppose for any class in a university, one expects 50% of the students to have grade equal or above B+, while the remaining students to be below B+. Now in one class of 20 students, eventually there are 12 students having grade equal or above B+, while the remaining 8 students are below that. How well does the observations fit the expectation? Using the goodness-of-fit chi-square test to give a p-value.
The College Registrar’s Office recorded the number of students receiving a grade of Incomplete. Results for...
The College Registrar’s Office recorded the number of students receiving a grade of Incomplete. Results for the past 26 quarters are: 19 58 63 77 53 39 93 35 63 32 46 57 67 62 67 71 59 48 56 75 48 28 47 42 81 62 (a) Make a frequency table with five classes, showing class boundaries, class midpoints, frequencies, and relative frequencies. (b) Make a relative frequency histogram with five classes.
Suppose we have assigned grades for the 11 students in our data: Grade A for Students...
Suppose we have assigned grades for the 11 students in our data: Grade A for Students who scored ≥ 90; B for students who scored ≥ 80 and < 90; C for students who scored ≥ 70 and < 80; D for students who scored ≥ 60 and < 70; F for students that scored < 60. Following the grade scheme, 7 students received an A; 1 student received a B; 0 students received a C; 0 students received a...
(31) The College Registrar's Office recorded the number of students receiving a grade of Incomplete. Results...
(31) The College Registrar's Office recorded the number of students receiving a grade of Incomplete. Results for the past 26 quarters are: 19 58 63 77 53 39 93 35 63 32 46 57 67 62 67 71 59 48 56 75 48 28 47 42 81 62 (a) Make a frequency table with five classes, showing class boundaries, class midpoints, frequencies, and relative frequencies. (b) Make a relative frequency histogram with five classes.
Suppose that you are in a class of 32 students and it is assumed that approximately...
Suppose that you are in a class of 32 students and it is assumed that approximately 18% of the population is left-handed. (Give your answers correct to three decimal places.) (a) Compute the probability that exactly five students are left-handed. (b) Compute the probability that at most four students are left-handed. (c) Compute the probability that at least six students are left-handed.
The bar graph below shows the percentage of students who received each letter grade on their...
The bar graph below shows the percentage of students who received each letter grade on their last English paper. The class contains 40 students. 60 50 40 30 20 10- D B с Grades What number of students earned a B on their paper? students What number of students earned a C or better on their paper? students
School administrators wondered whether class size and grade achievement (in percent) were related. A random sample...
School administrators wondered whether class size and grade achievement (in percent) were related. A random sample of classes revealed the following data where the number of students, x, affects the average grade, y. Given that ^y = 90.92 - 0.39x No. of students: 15 10 8 20 18 6 Avg. grade (%): 85 90 82 80 84 92 a) Predict the average grade for the number of students is 20 and compute the residual. Is the average grade average or...
1) The grades of students in a class are distributed normally. The average grade of the...
1) The grades of students in a class are distributed normally. The average grade of the students in this class is 65; standard deviation is 2. The students who take the teacher give more points by making "systematic error". What is the passing score since it gives more than 25% of the class score in total? Calculate.
1. Suppose that a researcher, using data on class size (CS) and average test scores from...
1. Suppose that a researcher, using data on class size (CS) and average test scores from 100 third-grade classes, estimates the OLS regression, T esdtScore = 520:4 5:82 CS A classroom has 22 students. Whatís the regressionís prediction for that classroomís average test score? Last year a classroom had 19 students, and this year it has 23 students. What is the regressionís prediction for the change in the classroom average test score? The sample average class size across the 100...
(31) The College Registrar's Office recorded the number of students receiving a grade of Incomplete. Results for the past 26 quarters are: 19 58 63 77 53 39 93 35 63 32 46 57 67 62 67 71 59 48 56 75 48 28 47 42 81 62 (a) Make a frequency table with five classes, showing class boundaries, class midpoints, frequencies, and relative frequencies. (b) Make a relative frequency histogram with five classes.
The bar graph below shows the percentage of students who received each letter grade on their last English paper. The class contains 40 students. 60 50 40 30 20 10- D B с Grades What number of students earned a B on their paper? students What number of students earned a C or better on their paper? students
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