Homework Answers
Solution :
n = 8
= 
= 27 + 30 + 20 + 29 + 28 + 36 + 34 + 31 / 8 = 235 / 8 =
29.38
Point estimate = 29.38
b)
Add Answer to:
A simple random sample of eight high school students' ACT scores gave the following data: 27...
The following table contains the ACT scores and the GPA for eight college students. Grade point...
The following table contains the ACT scores and the GPA for eight college students. Grade point average is based on a four-point scale and has been rounded to one digit after the decimal. Student GPA ACT 1 2.& 21 2 3.4 24 3 3.0 26 4 3.5 27 5 3.6 29 6 3.0 25 7 2.7 25 8 3.7 30 a) Estimate the relationship between GPA and ACT using OLS: that is, obtain the intercept and slope estimates in the...
Steve wants to estimate the average ACT scores of students graduated from his high school. He...
Steve wants to estimate the average ACT scores of students graduated from his high school. He randomly selected 30 students from an email list and ask them to provide the information. Of them 15 students replied and the summary of the ACT score is as below: Mean STD Min Max 21.6 8.4 14 32 (1) (2pts) In this study, what is the sample of the study? What is the population of the study? (2) (5pts) Steve is told that the...
The following table contains ACT scores and the GPA (grade point average) for eight college students.
4. The following table contains ACT scores and the GPA (grade point average) for eight college students. Grade point average is based on a four-point scale and has been rounded to one digit after the decimal: a. Estimate the relationship between GPA and ACT using OLS; that is, obtain the intercept and slope estimates in the equation Comment on the direction of the relationship. Does the intercept have a useful interpretation here? Explain. How much higher is the GPA predicted to be...
The scores of students on the SAT college entrance examinations at a certain high school had...
The scores of students on the SAT college entrance examinations at a certain high school had a normal distribution with mean μ=557.1 and standard deviation σ=29. (a) What is the probability that a single student randomly chosen from all those taking the test scores 562 or higher? For parts (b) through (d), consider a simple random sample (SRS) of 35 students who took the test. (b) What are the mean and standard deviation of the sample mean score x¯, of...
A random sample of 65 high school students has a normal distribution. The sample mean average...
A random sample of 65 high school students has a normal distribution. The sample mean average ACT exam score was 21.4 with a 3.2 sample standard deviation. Construct a 90% confidence interval estimate of the population mean average ACT exam.
(4)Five hundred students from a local high school took a college entrance examination. Historical data from the school record show that the standard deviation of test scores is 40. A random sampl...
(4)Five hundred students from a local high school took a college entrance examination. Historical data from the school record show that the standard deviation of test scores is 40. A random sample of thirty- six students is taken from the entire population of 500 students. The mean test score for the sample is three hundred eighty. Find (a) 95% confidence interval for the unknown population mean test score. (b) 95% confidence interval for the unknown population mean test score if...
ACT SCORES: {23, 28, 22, 20, 23, 19, 20, 29, 27, 18} In addition to ACT...
ACT SCORES: {23, 28, 22, 20, 23, 19, 20, 29, 27, 18} In addition to ACT scores of the students, consider the following set of data representing the GPAs of each student respectively. {1.83, 4, 3.05, 3.77, 3.55, 2.58, 3.16, 3.39, 3.86, 2.92} (a) Compute the correlation coefficient. What do you think about the relationship? (b) Determine the equation of the least squares line by calculating the slope (b1) and intercept (b0). Use this equation to forecast the ACT score...
Question 5 (1 point) For students who graduated from high school in 2013, the ACT math...
Question 5 (1 point) For students who graduated from high school in 2013, the ACT math scores are approximately normally distributed with mean 20.9 points and standard deviation 5.3 points. What is the z-score of 17 points? Round by cutting off the result up to two decimal places. What proportion of students who took the ACT scored at least 17 points? Give your result as a decimal rounded up to four decimal places. 36
The following is data for the first and second Quiz scores for 8 students in a...
The following is data for the first and second Quiz scores for 8 students in a class. First Quiz (Q1) Second Quiz (Q2) 17 15 18 14 19 15 20 19 26 24 27 23 29 28 30 27 Plot the points in the grid below, then sketch a line that best fits the data. 32+ Q2 28 24 20 16 12 8 Q1 8 12 16 20 24 28 33 Clear All Draw: : Use the line above to...
The following is data for the first and second Quiz scores for 8 students in a...
The following is data for the first and second Quiz scores for 8 students in a class. First Quiz (Q1) 17 18 19 20 26 Second Quiz (Q2) 15 14 15 19 24 23 28 27 27 29 30 Plot the points in the grid below, then sketch a line that best fits the data. 32 Q2 28 24 20 16 12 8 4 Q1 28 32 8 12 16 20 24 Clear All Draw: Use the line above to...
The following table contains the ACT scores and the GPA for eight college students. Grade point average is based on a four-point scale and has been rounded to one digit after the decimal. Student GPA ACT 1 2.& 21 2 3.4 24 3 3.0 26 4 3.5 27 5 3.6 29 6 3.0 25 7 2.7 25 8 3.7 30 a) Estimate the relationship between GPA and ACT using OLS: that is, obtain the intercept and slope estimates in the...
Steve wants to estimate the average ACT scores of students graduated from his high school. He randomly selected 30 students from an email list and ask them to provide the information. Of them 15 students replied and the summary of the ACT score is as below: Mean STD Min Max 21.6 8.4 14 32 (1) (2pts) In this study, what is the sample of the study? What is the population of the study? (2) (5pts) Steve is told that the...
4. The following table contains ACT scores and the GPA (grade point average) for eight college students. Grade point average is based on a four-point scale and has been rounded to one digit after the decimal: a. Estimate the relationship between GPA and ACT using OLS; that is, obtain the intercept and slope estimates in the equation Comment on the direction of the relationship. Does the intercept have a useful interpretation here? Explain. How much higher is the GPA predicted to be...
(4)Five hundred students from a local high school took a college entrance examination. Historical data from the school record show that the standard deviation of test scores is 40. A random sample of thirty- six students is taken from the entire population of 500 students. The mean test score for the sample is three hundred eighty. Find (a) 95% confidence interval for the unknown population mean test score. (b) 95% confidence interval for the unknown population mean test score if...
Question 5 (1 point) For students who graduated from high school in 2013, the ACT math scores are approximately normally distributed with mean 20.9 points and standard deviation 5.3 points. What is the z-score of 17 points? Round by cutting off the result up to two decimal places. What proportion of students who took the ACT scored at least 17 points? Give your result as a decimal rounded up to four decimal places. 36
The following is data for the first and second Quiz scores for 8 students in a class. First Quiz (Q1) Second Quiz (Q2) 17 15 18 14 19 15 20 19 26 24 27 23 29 28 30 27 Plot the points in the grid below, then sketch a line that best fits the data. 32+ Q2 28 24 20 16 12 8 Q1 8 12 16 20 24 28 33 Clear All Draw: : Use the line above to...
The following is data for the first and second Quiz scores for 8 students in a class. First Quiz (Q1) 17 18 19 20 26 Second Quiz (Q2) 15 14 15 19 24 23 28 27 27 29 30 Plot the points in the grid below, then sketch a line that best fits the data. 32 Q2 28 24 20 16 12 8 4 Q1 28 32 8 12 16 20 24 Clear All Draw: Use the line above to...
Most questions answered within 3 hours.
-
What is the temperature of 100.0 grams of chlorine gas in a
55.0-L container at 800....
asked 5 minutes ago -
POLITICAL SCIENCE: Is members of the House of Representatives
responsive to public opinion?
asked 5 minutes ago -
The following information is available for two samples selected
from independent normally distributed populations. Population A:...
asked 7 minutes ago -
Hello, I have questions on Matlab. Let's say that I have an
equation. Signal x(t)= cos(2*pi*10*t)...
asked 1 hour ago -
choose a radioactive isotope used in healthcare or another field
and report on how your isotope...
asked 37 minutes ago -
Balance the following half-reactions in acidic solution,
identify the oxidation states of the metal atoms, and...
asked 33 minutes ago -
describe
three ways that industrialized agriculture can impact human
health?
asked 50 minutes ago -
A resistor and capacitor are connected in series to a power
supply of 50 Volts. The...
asked 45 minutes ago -
(20
10Ne) (72 37Rb) (16 8O) (11 5B) why isotope of Rb is most unstable?
is...
asked 41 minutes ago -
A firm will pay a dividend of $2.01 next year. The dividend is
expected to grow...
asked 49 minutes ago -
The Bureau of Labor Statistics divides the adult population into
four categories: employed, underemployed, unemployed, and...
asked 1 hour ago -
Question 29 Which of the following is not needed in order to
prepare a statement of...
asked 1 hour ago