The number of cartoons watched by Mrs. Kelly's first grade class on Saturday morning along with...
The number of cartoons watched by Mrs. Kelly's first grade class on Saturday morning along with the percentages of the class who watched the number of cartoons is shown below.
X 0 1 2 3 4 5
P(X) .1 .2 .25 .3 .1 .05
Answer both of the following:
A. Find the mean of the probability distribution.
B. Find the standard deviation of the probability distribution.
Homework Answers
Add Answer to:
The number of cartoons watched by Mrs. Kelly's first grade class
on Saturday morning along with...
18) The number of cartoons watched on Saturday mornings by students in Mrs. Kelly's first grade...
18) The number of cartoons watched on Saturday mornings by students in Mrs. Kelly's first grade class is shown below. Number of cartoons watched x Probability P(X) 0 0.15 1 0.20 2 0.30 3 0.10 4 0.20 5 0.05 Give the standard deviation for the probability distribution. A) 2.25 B) 1.18 C) 1.89 D) 1.46
Barbara and James are in two separate classes taught by Mrs. Oshinsky. In Barbara’s class, the...
Barbara and James are in two separate classes taught by Mrs. Oshinsky. In Barbara’s class, the mean grade on a poetry test is a 74 and the standard deviation is 8. In James’s class, the mean grade is a 79 and the standard deviation is 3. Barbara and James both earn a 92 on their tests. (A) Which student performed better in comparison to his or her class? You must show calculations to justify your response, or no credit will...
Barbara and James are in two separate classes taught by Mrs. Oshinsky. In Barbara’s class, the...
Barbara and James are in two separate classes taught by Mrs. Oshinsky. In Barbara’s class, the mean grade on a poetry test is a 74 and the standard deviation is 8. In James’s class, the mean grade is a 79 and the standard deviation is 3. Barbara and James both earn a 92 on their tests. (A) Which student performed better in comparison to his or her class? You must show calculations to justify your response, or no credit will...
The overall grade of a statistics class has a normal distribution with mean of 85.5 and...
The overall grade of a statistics class has a normal distribution with mean of 85.5 and standard deviation of 5.5. The instructor decides letter grades of students so that 5% fails the class. Find the minimum overall grade a student should get so that the student does not fail the class. (keep 1 decimal place)
5. North Carolina State University posts the complete grade distributions for its courses online. The distribution of grades for all students in all sections of Accounting 210 in the spring semester...
5. North Carolina State University posts the complete grade distributions for its courses online. The distribution of grades for all students in all sections of Accounting 210 in the spring semester of 2001 was Grade Probability .18 32 34 09 07 a. Using the scale A -4, B-3, C-2, D- 1, and F 0, let Xbe the grade of a randomly chosen b. Let X denote the mean grade for a random sample of 50 students from Accounting 210. Since...
Professor Smith took a sample of 196 students from her morning class and a sample of...
Professor Smith took a sample of 196 students from her morning class and a sample of 171 students from her evening class. On Exam 1, all those sampled from the morning class got a 66 while those sampled from the evening class averaged a 67 with a variance of 178. If Professor Smith combines these two samples. Question 2 What is the combined Exam 1 average? Question 3AWhat is the combined Exam 1 median? Question 3B What is the shape...
It has been seen that the mean grade point average for students who live on campus...
It has been seen that the mean grade point average for students who live on campus is 2.75 with standard deviation of 0.43, while that of students who live off campus is 2.6 with standard deviation of 0.68. 7 sophomores are randomly selected from campus dormitories at a college and 20 sophomores are randomly selected from students who live off campus. The mean grade point averages of the two groups are compared. The expected difference in the sample grade point...
1. A professor grades students on a normal distribution. For any grade x, based on a...
1. A professor grades students on a normal distribution. For any grade x, based on a course mean and standard deviation developed over years of testing, the following scale applies A': course grade 1.6 standard deviation above the mean 'B': course grade between 0.45 and 1.6 standard deviations above the mean C': course grade t 0.45 standard deviations from the mean. Assuming "large sample size", what percentage of students will receive an A in course? 2.61 % 3.78 % 4.95...
Professor smith took a sample of 214 students from her morning class and a sample of...
Professor smith took a sample of 214 students from her morning class and a sample of 115 students from her evening class. On Exam 1, all those sampled from the morning class got a 68, while those sampled from the evening class averaged a 68 with a variance of 158. If professor smith combines these two samples.... 1) What is the combined Exam 1 Average? 2) What is the combined Exam 1 Median? 3) what is the shape of the...
The final exam grade of a statistics class has a normal distribution with mean of 75.5...
The final exam grade of a statistics class has a normal distribution with mean of 75.5 and standard deviation of 7. Find the two cutoff values which separate the middle 20% of final exam grades in this class. Lower cutoff is (keep 1 decimal place) Upper cutoff is (keep 1 decimal place)
18) The number of cartoons watched on Saturday mornings by students in Mrs. Kelly's first grade class is shown below. Number of cartoons watched x Probability P(X) 0 0.15 1 0.20 2 0.30 3 0.10 4 0.20 5 0.05 Give the standard deviation for the probability distribution. A) 2.25 B) 1.18 C) 1.89 D) 1.46
5. North Carolina State University posts the complete grade distributions for its courses online. The distribution of grades for all students in all sections of Accounting 210 in the spring semester of 2001 was Grade Probability .18 32 34 09 07 a. Using the scale A -4, B-3, C-2, D- 1, and F 0, let Xbe the grade of a randomly chosen b. Let X denote the mean grade for a random sample of 50 students from Accounting 210. Since...
Professor Smith took a sample of 196 students from her morning class and a sample of 171 students from her evening class. On Exam 1, all those sampled from the morning class got a 66 while those sampled from the evening class averaged a 67 with a variance of 178. If Professor Smith combines these two samples. Question 2 What is the combined Exam 1 average? Question 3AWhat is the combined Exam 1 median? Question 3B What is the shape...
1. A professor grades students on a normal distribution. For any grade x, based on a course mean and standard deviation developed over years of testing, the following scale applies A': course grade 1.6 standard deviation above the mean 'B': course grade between 0.45 and 1.6 standard deviations above the mean C': course grade t 0.45 standard deviations from the mean. Assuming "large sample size", what percentage of students will receive an A in course? 2.61 % 3.78 % 4.95...
Most questions answered within 3 hours.
-
Let M = 8.00kg, m = 6.00kg, θ = 40.00, and the coefficient of
kinetic friction...
asked 2 minutes ago -
Java. For C through H True or false?
c. Primitive variables must be objects.
d. Integer...
asked 7 minutes ago -
Write a program that turns a 32-bit numeric value (e.g.,
0xFFFFh) and converts it to a...
asked 8 minutes ago -
A motor produces a torque of 0.25 N m at an angular velocity of
7200 revolutions...
asked 22 minutes ago -
***Please answer the below java question***
Are static methods inheritable? Can they be overridden?
asked 24 minutes ago -
In reaching her destination, a backpacker walks with an average
velocity of 1.13 m/s, due west....
asked 25 minutes ago -
Write two C programs that run a
server program and a client program concurrently.
Server program:...
asked 24 minutes ago -
Executive Program Practical Connection Assignment
Subject : Operations Security.
Assignment:
Provide a reflection of at least...
asked 34 minutes ago -
Every time Casey is at bat he has a 0.4 probability of
getting on base (assume...
asked 42 minutes ago -
The Walston Company is to be liquidated and has the following
liabilities:
Income taxes
$
9,400...
asked 49 minutes ago -
If
the more comprehensive data is available in MEPS, why does the NHIS
still exist? How...
asked 1 hour ago -
Koo argues that the Japanese economy in the 1990s suffered from
a balance sheet recession. What...
asked 1 hour ago