Homework Answers
5. The correct answer is: b)
Reason: if the confidence interval contain the value of the null hypothesis, then the null hypothesis is accepted and the results are statistically insignificant.
6. The correct answer is: c)
Reason: if the confidence interval does not contain the value of the null hypothesis, then the null hypothesis is rejected and the results are statistically significant.
7. The correct answer is: c).
Reason: same as in answer 6.
Thanks!
Add Answer to:
lprice Coef 95% CI, mpg weight rep78 0.0130 [-0.0345, 0.0086 8.0063 [0.0001, e,0004 0.1345 0.0519, 0.21721...
Quel He Rhino viruses typically cause common colds. In a test of the effectiveness of echinacea,...
Quel He Rhino viruses typically cause common colds. In a test of the effectiveness of echinacea, 39 of the 46 subjects treated with echinacea developed rhinovirus infections. In a placebo group. 73 of the 90 subjects developed rhinovirus infections. Use a 0.01 significance level to test the claim that echinacea has an effect on rhinovirus infections. Complete parts (a) through (c) below. a. Test the claim using a hypothesis test. Consider the first sample to be the sample of subjects...
This Test: 100 pts possi A random sample of 10 students were surveyed on their social...
This Test: 100 pts possi A random sample of 10 students were surveyed on their social activities. The students were asked to be how many times during the previous year they had gone to a movie, sporting event of party, FR Survey Results Click the icon to view the survey results Click the icon to view the dot plot for these data Cack the icon to view the technology output for these data Frequency of Attending Movies Sports Events, and...
Determine if the following statements are true or false, and explain your reasoning. If false, state...
Determine if the following statements are true or false, and explain your reasoning. If false, state how it could be corrected. (a) If a given value (for example, the null hypothesized value of a parameter) is within a 95% confidence interval, it will also be within a 99% confidence interval. O true false (b) Decreasing the significance level (a) will increase the probability of making a Type 1 Error. false O true (c) Suppose the null hypothesis is u =...
Rhino viruses typically cause common colds. In a test of the effectiveness of echinacea, 44 of...
Rhino viruses typically cause common colds. In a test of the effectiveness of echinacea, 44 of the 51 subjects treated with echinacea developed thinovirus infections. In a placebo group, 87 of the 104 subjects developed thinovirus infections. Use a 0.05 significance level to test the claim that echinacea has an effect on thinovirus infections Complete parts (a) through (c) below. a. Test the claim using a hypothesis test Consider the first sample to be the sample of subjects treated with...
A researcher wanted to study the effect of a newly developed gasoline additive (Additive X) on automobile mileage (mil...
A researcher wanted to study the effect of a newly developed gasoline additive (Additive X) on automobile mileage (miles per gallon, MPG). To gather information, a random sample of cars has been selected. For each car, the MPG was measured both when gasoline with Additive X is used and when gasoline without Additive X is used. The order of the two treatments (with Additive X versus without Additive X) was randomized and care was taken so that there was no...
For a sample of 20 New England cities, a sociologist studies the crime rate in each...
For a sample of 20 New England cities, a sociologist studies the crime rate in each city (crimes per 100,000 residents) as a function of its poverty rate (in %) and its median income (in $1,000s). A portion of the regression results is as follows. [You may find it useful to reference the t table.) F 0.05 ANOVA Regression Residual Total M S 229.2 4,464.56 Significance F 0.950 df SS 2 458.3 17 75,897.54 1976,355.9 Intercept Poverty Income Coefficients 754.4596...
Missed Classes Final Grade 4 75 6 80 1 91 4 71 0 95 2 83...
Missed Classes Final Grade
4 75
6 80
1 91
4 71
0 95
2 83
0 91
5 86
2 96
Suppose a teacher recorded the attendance of her students in a recent statistics class because she wanted to investigate the linear relationship between the number of classes they missed and their final grades. The accompanying table shows these data for a random sample of nine students. Complete parts a through c. Click the icon to view the table...
Scores in the first and fourth (final) rounds for a sample of 20 golfers who competed...
Scores in the first and fourth (final) rounds for a sample of 20 golfers who competed in golf tournaments are shown in the following table. Player First Round Final Round Golfer 1 70 72 Golfer 2 71 72 Golfer 3 70 74 Golfer 4 72 71 Golfer 5 70 69 Golfer 6 67 67 Golfer 7 71 68 Golfer 8 68 73 Golfer 9 67 73 Golfer 10 70 69 Player First Round Final Round Golfer 11 72 72 Golfer...
Grades on a standardized test are known to have a mean of 1020 for students in...
Grades on a standardized test are known to have a mean of 1020 for students in the United States. The test is administered to 473 randomly selected students in Florida; in this sample, the mean is 1033.26 and the standard deviation (s) is 110.16. The 95% confidence interval for the average test score for Florida students is ( 1023.33, 1043.19 ). (Round your responses to two decimal places.) Is there statistically significant evidence that Florida students perform differently than other...
please indicate all answers Horr In a random sample of males, it was found that 22...
please indicate all answers
Horr In a random sample of males, it was found that 22 write with their left hands and 221 do not. In a random sample of females, it was found that 67 write with their left hands and 458 do not. Use a 0.01 significance level to test the claim that the rate of left-handedness among males is less than that among females. Complete parts (a) through (c) below. cem a. Test the claim using a...
Quel He Rhino viruses typically cause common colds. In a test of the effectiveness of echinacea, 39 of the 46 subjects treated with echinacea developed rhinovirus infections. In a placebo group. 73 of the 90 subjects developed rhinovirus infections. Use a 0.01 significance level to test the claim that echinacea has an effect on rhinovirus infections. Complete parts (a) through (c) below. a. Test the claim using a hypothesis test. Consider the first sample to be the sample of subjects...
This Test: 100 pts possi A random sample of 10 students were surveyed on their social activities. The students were asked to be how many times during the previous year they had gone to a movie, sporting event of party, FR Survey Results Click the icon to view the survey results Click the icon to view the dot plot for these data Cack the icon to view the technology output for these data Frequency of Attending Movies Sports Events, and...
Determine if the following statements are true or false, and explain your reasoning. If false, state how it could be corrected. (a) If a given value (for example, the null hypothesized value of a parameter) is within a 95% confidence interval, it will also be within a 99% confidence interval. O true false (b) Decreasing the significance level (a) will increase the probability of making a Type 1 Error. false O true (c) Suppose the null hypothesis is u =...
Rhino viruses typically cause common colds. In a test of the effectiveness of echinacea, 44 of the 51 subjects treated with echinacea developed thinovirus infections. In a placebo group, 87 of the 104 subjects developed thinovirus infections. Use a 0.05 significance level to test the claim that echinacea has an effect on thinovirus infections Complete parts (a) through (c) below. a. Test the claim using a hypothesis test Consider the first sample to be the sample of subjects treated with...
A researcher wanted to study the effect of a newly developed gasoline additive (Additive X) on automobile mileage (miles per gallon, MPG). To gather information, a random sample of cars has been selected. For each car, the MPG was measured both when gasoline with Additive X is used and when gasoline without Additive X is used. The order of the two treatments (with Additive X versus without Additive X) was randomized and care was taken so that there was no...
For a sample of 20 New England cities, a sociologist studies the crime rate in each city (crimes per 100,000 residents) as a function of its poverty rate (in %) and its median income (in $1,000s). A portion of the regression results is as follows. [You may find it useful to reference the t table.) F 0.05 ANOVA Regression Residual Total M S 229.2 4,464.56 Significance F 0.950 df SS 2 458.3 17 75,897.54 1976,355.9 Intercept Poverty Income Coefficients 754.4596...
Missed Classes Final Grade
4 75
6 80
1 91
4 71
0 95
2 83
0 91
5 86
2 96
Suppose a teacher recorded the attendance of her students in a recent statistics class because she wanted to investigate the linear relationship between the number of classes they missed and their final grades. The accompanying table shows these data for a random sample of nine students. Complete parts a through c. Click the icon to view the table...
Grades on a standardized test are known to have a mean of 1020 for students in the United States. The test is administered to 473 randomly selected students in Florida; in this sample, the mean is 1033.26 and the standard deviation (s) is 110.16. The 95% confidence interval for the average test score for Florida students is ( 1023.33, 1043.19 ). (Round your responses to two decimal places.) Is there statistically significant evidence that Florida students perform differently than other...
please indicate all answers
Horr In a random sample of males, it was found that 22 write with their left hands and 221 do not. In a random sample of females, it was found that 67 write with their left hands and 458 do not. Use a 0.01 significance level to test the claim that the rate of left-handedness among males is less than that among females. Complete parts (a) through (c) below. cem a. Test the claim using a...
Most questions answered within 3 hours.
-
The x component of the velocity of an object vibrating
along the x-axis obeys the equation...
asked 43 minutes ago -
A junction box contains two trade size 2 raceways on the left
side, and two trade...
asked 1 hour ago -
Atmospheric Mass
Venus and Earth have about the same mass and radius, but the
atmospheric pressure...
asked 1 hour ago -
5. Discuss the use of fault tree analysis (FTA) for risk
assessment (maximum one paragraph).
asked 2 hours ago -
Given that a sample of aluminium oxide has a Young's modulus of
393 GPa and a...
asked 4 hours ago -
At a certain temperature, the equilibrium constant, Kc, for this
reaction is 53.3.
H2(g)+I2(g)−⇀↽−2HI(g)Kc=53.3
At this...
asked 5 hours ago -
Question1 ) The STL provides similiar classes called stack and
queue, both of which gave functions...
asked 6 hours ago -
For Questions 1-4, assume you have 5 bits available:
1. For (positive) integers: What is the...
asked 6 hours ago -
convert grams into vloume with the density of water being at
.997514 g/cm^3 at 23.1 Celsuis...
asked 8 hours ago -
Foreman company obtained a $20,000, 6% loan on May 1, 2018.
Principal and interest will be...
asked 8 hours ago -
5. Problem 11.05 (Discounted Payback)
eBook
Project L costs $60,000, its expected cash inflows are $14,000
per...
asked 9 hours ago -
1. Which of the following is true about politics and health
organizations?
A. Health organizations are...
asked 9 hours ago