The mean and standard deviation for the quality grade point averages of a random sample of...
The mean and standard deviation for the quality grade point averages of a random sample of 28 senior high school students are calculated to be 2.6 and 0.3 respectively.
what is the point estimate for the mean?
what is the point estimate for the variance?
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The mean and standard deviation for the quality grade point
averages of a random sample of...
The mean and standard deviation for the quality grade point averages of a random sample of...
The mean and standard deviation for the quality grade point averages of a random sample of 28 senior high school students are calculated to be 2.6 and 0.3 respectively. What is the point estimate for the mean? What is the point estimate for the variance?
The following are grade point averages (GPAs) for a sample of students in a scholarship competition:...
The following are grade point averages (GPAs) for a sample of students in a scholarship competition: 3.6, 3.8, 3.6, 3.9, 2.6, 3.8, 3.8, 3.9. a. Organize the data into a frequency distribution table. b. Using this frequency distribution format, calculate the mean and the standard deviation (using the direct method). c. Is there something peculiar in this distribution? Adjust for it by recalculating the statistics. d. Comment on the differences betrveen the original statistics and the adiusted statistics. plz write...
Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with...
Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.56 and a standard deviation of 0.38. Using the empirical rule, what percentage of the students have grade point averages that are at least 1-422 Please do not round your answer Suppose that grade point averages of undergraduate students at one university have a bell shaped distribution with a mean of 2.61 and a standard deviation of 0.4 using the empirical...
Aresearcher selected a random sample of 10 psychology graduates and found the standard deviation of their...
Aresearcher selected a random sample of 10 psychology graduates and found the standard deviation of their grade point average was 0.72. Then she selected a random sample of 14 engineering students and found that the standard deviation of their grade point average was 0.51. At a = 0.01, can we conclude that the variance of the grade point average of the psychology graduates is greater than the variance of the grade point average of the engineering graduates?
The grade point averages (GPA) for 12 randomly selected college students are shown on the right....
The grade point averages (GPA) for 12 randomly selected college
students are shown on the right. Complete parts (a) through (c)
below. Assume the population is normally distributed.
2.1, 3.1, 2.6, 1.5, 0.6, 4.0, 2.1, 1.1, 3.6, 0.5, 2.1, 3.4
construct a 90% confidence interval for the population mean
The grade point averages (GPA) for 12 randomly selected college students are shown on the right. Complete parts (a) through (c) 2.1 below. 1.5 Assume the population is normally distributed. 2.1...
suppose that a random sample of 10 students in grade six was taken and the confidence...
suppose that a random sample of 10 students in grade six was taken and the confidence interval corresponding to their mean height (in inches) was found. the confidence interval was calculated to be (63.1, 65.3) with a known population standard deviation of 2.6 inches. what is the confidence level (as percentage) corresponding to this confidence interval ?
The grade point averages (GPA) of 18 randomly selected college students are used to estimate the...
The grade point averages (GPA) of 18 randomly selected college students are used to estimate the mean GPA of the college students. The GPAs from the sample are as follows: 2.3 3.3 2.6 1.8 0.2 3.1 4.0 0.7 3.1 2.3 2.0 3.1 3.4 1.3 2.6 2.6 3.7 2.2 (5 points) Is it justified to use of the standard normal distribution to construct the confidence interval? Explain. (10 points) If the population is assumed to be normally distributed, construct a 98% confidence interval for the population mean GPA. Show your work in detail and use 3...
(a) Find the sample mean (b) Find the sample standard deviation (c) Construct a 99% confidence...
(a) Find the sample mean
(b) Find the sample standard deviation
(c) Construct a 99% confidence interval for the population mean
μ.
The numbers to the right are 2.4, 1.6, 2.3, 0.4, 3.4, 0.9, 1.1,
2.3, 2.6, 4.0, 3.8, 3.2
6.2.26-T Question Help The grade point averages (GPA) for 12 randomly selected college students are shown on the right. Complete parts (a) through (c) below. 2.4 3.4 2.6 1.6 0.9 4.0 Assume the population is normally distributed. 2.3 1.1 3,8...
a random sample of 150 students has a grade point average with a mean of 2.86....
a random sample of 150 students has a grade point average with a mean of 2.86. Assume the population standard deviation is 0.78. Constrict the confidence interval for the population mean ų, if c=0.98. 2.51, 3.53 2.31, 3.88 2.43, 3.79 2.71, 3.01
Grade point averages of math majors at a large distance education university are normally distributed with...
Grade point averages of math majors at a large distance education university are normally distributed with a mean of 2.85 and a standard deviation of 0.30. If a random sample of 25 math majors is selected from that university, what is the probability that the sample mean grade point average will be a. either less than 2.709 or more than 2.955? b. at least 2.757?
Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.56 and a standard deviation of 0.38. Using the empirical rule, what percentage of the students have grade point averages that are at least 1-422 Please do not round your answer Suppose that grade point averages of undergraduate students at one university have a bell shaped distribution with a mean of 2.61 and a standard deviation of 0.4 using the empirical...
Aresearcher selected a random sample of 10 psychology graduates and found the standard deviation of their grade point average was 0.72. Then she selected a random sample of 14 engineering students and found that the standard deviation of their grade point average was 0.51. At a = 0.01, can we conclude that the variance of the grade point average of the psychology graduates is greater than the variance of the grade point average of the engineering graduates?
The grade point averages (GPA) for 12 randomly selected college
students are shown on the right. Complete parts (a) through (c)
below. Assume the population is normally distributed.
2.1, 3.1, 2.6, 1.5, 0.6, 4.0, 2.1, 1.1, 3.6, 0.5, 2.1, 3.4
construct a 90% confidence interval for the population mean
The grade point averages (GPA) for 12 randomly selected college students are shown on the right. Complete parts (a) through (c) 2.1 below. 1.5 Assume the population is normally distributed. 2.1...
(a) Find the sample mean
(b) Find the sample standard deviation
(c) Construct a 99% confidence interval for the population mean
μ.
The numbers to the right are 2.4, 1.6, 2.3, 0.4, 3.4, 0.9, 1.1,
2.3, 2.6, 4.0, 3.8, 3.2
6.2.26-T Question Help The grade point averages (GPA) for 12 randomly selected college students are shown on the right. Complete parts (a) through (c) below. 2.4 3.4 2.6 1.6 0.9 4.0 Assume the population is normally distributed. 2.3 1.1 3,8...
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