To test whether whether or not the product of two vendors had a larger mean value...
To test whether whether or not the product of two vendors had a larger mean value than the other, a sample of 12 pieces was taken from each. The T test value was calculated as 1.85 ( with equal variance assumed). Using a level of significance of 0.01, one tail test, we can conclude that
a. There was no significant difference in the variation of the vendors
b. The T test value is less than the t critical
c. The null hypothesis is that the means are the same was rejected.
Homework Answers
Degrees of freedom = 12 + 12 - 2 = 22
For 22 degrees of freedom and 1.85 test statistic with one tailed test:
p - Value = P(t(22) > 1.85) = 0.0389
This is greater than 0.01 significance level. So,
The T test value is less than the t critical
Option B is correct.
Add Answer to:
To test whether whether or not the product of two vendors had a
larger mean value...
A medical researcher wants to determine whether a drug changes the body’s temperature. Seven test subjects...
A medical researcher wants to determine whether a drug changes the body’s temperature. Seven test subjects are randomly selected, and the body temperature (in degrees Fahrenheit) of each is measured. The subjects are then given the drug and after 20 minutes, the body temperature of each is measured again. The results are listed below. Use significance level α = 0.05, and we assume that the body temperatures are normally distributed. Show your work space provided below: t-Test: Paired Two Sample...
The state labor relations board is investigating potential income inequality among male and female managers. It...
The state labor relations board is investigating potential income inequality among male and female managers. It has compiled salaries (in dollars) from random samples of male and female managers working in a variety of companies. Use the Excel output for the F-test on variances and t-test on means to identify whether each of the following conclusions is correct. You must make a selection for each option. Click once to place a check mark for correct answers. Click twice to leave...
PLEASE help ?? A researcher conducted a single sample t-test on results of an experiment with...
PLEASE help ??
A researcher conducted a single sample t-test on results of an experiment with n = 18 participants and the computed t = -2.28. What is the correct conclusion from this experiment if p < 0.05, 2-tails test is used for hypothesis testing? O A. The researcher failed to reject the null hypothesis and concluded that there is a significant treatment effect. O B. The researcher rejected the null hypothesis and concluded that there is a significant treatment...
t-Test: Two-Sample Assuming Equal Variances Variable 1 Variable 2 Mean 12.89795918 17.66666667 Variance 161.2185374 567.8266667 Observations...
t-Test: Two-Sample Assuming Equal Variances Variable 1 Variable 2 Mean 12.89795918 17.66666667 Variance 161.2185374 567.8266667 Observations 49 51 Pooled Variance 368.6716646 Hypothesized Mean Difference 0 Df 98 t Stat -1.241549191 P(T<=t) one-tail 0.108683158 t Critical one-tail 1.660551217 P(T<=t) two-tail 0.217366316 t Critical two-tail 1.984467455 Is there a significant difference between the two sample means? If you answer, “yes,” what is your reasoning? If you answer, “no,” what is your reasoning? Please state the conclusion, or your interpretation of the results in terms...
Consider a situation where we want to compare means, M1 and 42 of two populations, Group...
Consider a situation where we want to compare means, M1 and 42 of two populations, Group 1 and Group 2, respectively. A random sample of 40 observations was selected from each of the two populations. The following table shows the two-sample t test results at a = 5% assuming equal population variances: t-Test: Two-Sample Assuming Equal Variances Group 2 28652 33.460 40 Mean Variance Observations Pooled Variance Hypothesized Mean Difference d t Stat PTcut) one-tail Critical one-tail PTC-t) two-tail Critical...
Assume that both populations are normally distributed. (a) Test whether μ1≠μ2 at the α=0.01 level of...
Assume that both populations are normally distributed. (a) Test whether μ1≠μ2 at the α=0.01 level of significance for the given sample data. (b) Construct a 9999% confidence interval about 1−μ2. Population 1 Population 2 n 10 10 x overbarx 10.1 8.9 s 2.4 2.3 (a) Test whether μ1≠μ2 at the α=0.01 level of significance for the given sample data. Determine the null and alternative hypothesis for this test. Detemine the P-value for this hypothesis test. P=________. (Round to three decimal...
I realize that you do not have the excel file in the question but please explain how to solve it
i
realize that you do not have the excel file in the question but
please explain how to solve it
The file testquestions.xlsx contains data on the sales of four products across five provinces for 35 weeks, along with other information on how much money 23 different customers spent on several products using a two tailed test, and a 5% level of significance, the null hypothesis that the average Tablet spending across customers was $75 higher than the average Headphone...
Jane wants to run a hypothesis test with the significant level equal to 0.05. After collecting...
Jane wants to run a hypothesis test with the significant level equal to 0.05. After collecting the data, she calculates that the p value is equal to 0.003. What are the appropriate next step? Please select the best answer. Conclude that the null hypothesis is rejected. Change the significant level to be 0.001, so that the null hypothesis is not rejected. Conclude that the null hypothesis is not rejected. Change the significance level to be 0.01, so that she can...
Rainy Weekends - Significance Test: During the summer of 2012 in Acadia National Park, the mean...
Rainy Weekends - Significance Test: During the
summer of 2012 in Acadia National Park, the mean rainfall on
weekends was greater than the mean on weekdays. In this problem we
determine whether or not it rained significantly
more on weekends. A significant difference is one that is unlikely
to be a result of random variation. The table summarizes this data.
The
x
's are actually population means but we treat them like sample
means.
Necessary information:
n
x
s2
s ...
Suppose you want to determine whether there is a significant difference in mean test scores for...
Suppose you want to determine whether there is a significant difference in mean test scores for females and males. The test is out of 600 points. Using the following hypotheses: Ho: U1 - U2 = 0 HA: U1 - U2 (not equal) 0 And alpha of 0.05 you obtain the following results t-test Two-sample assuming unequal variances Females Males Mean 525 487 Variance 3530.8 2677.818182 Observations 16 12 Hypothesized Mean Difference 0 df 25 t stat 1.803753 P (T<=t) one...
The state labor relations board is investigating potential income inequality among male and female managers. It has compiled salaries (in dollars) from random samples of male and female managers working in a variety of companies. Use the Excel output for the F-test on variances and t-test on means to identify whether each of the following conclusions is correct. You must make a selection for each option. Click once to place a check mark for correct answers. Click twice to leave...
PLEASE help ??
A researcher conducted a single sample t-test on results of an experiment with n = 18 participants and the computed t = -2.28. What is the correct conclusion from this experiment if p < 0.05, 2-tails test is used for hypothesis testing? O A. The researcher failed to reject the null hypothesis and concluded that there is a significant treatment effect. O B. The researcher rejected the null hypothesis and concluded that there is a significant treatment...
Consider a situation where we want to compare means, M1 and 42 of two populations, Group 1 and Group 2, respectively. A random sample of 40 observations was selected from each of the two populations. The following table shows the two-sample t test results at a = 5% assuming equal population variances: t-Test: Two-Sample Assuming Equal Variances Group 2 28652 33.460 40 Mean Variance Observations Pooled Variance Hypothesized Mean Difference d t Stat PTcut) one-tail Critical one-tail PTC-t) two-tail Critical...
i
realize that you do not have the excel file in the question but
please explain how to solve it
The file testquestions.xlsx contains data on the sales of four products across five provinces for 35 weeks, along with other information on how much money 23 different customers spent on several products using a two tailed test, and a 5% level of significance, the null hypothesis that the average Tablet spending across customers was $75 higher than the average Headphone...
Jane wants to run a hypothesis test with the significant level equal to 0.05. After collecting the data, she calculates that the p value is equal to 0.003. What are the appropriate next step? Please select the best answer. Conclude that the null hypothesis is rejected. Change the significant level to be 0.001, so that the null hypothesis is not rejected. Conclude that the null hypothesis is not rejected. Change the significance level to be 0.01, so that she can...
Rainy Weekends - Significance Test: During the
summer of 2012 in Acadia National Park, the mean rainfall on
weekends was greater than the mean on weekdays. In this problem we
determine whether or not it rained significantly
more on weekends. A significant difference is one that is unlikely
to be a result of random variation. The table summarizes this data.
The
x
's are actually population means but we treat them like sample
means.
Necessary information:
n
x
s2
s ...
Most questions answered within 3 hours.
-
Steven can afford car payments of $300 a month for 72 months.
The bank will lend...
asked 12 minutes ago -
Embedded
System..
1.
Analyze
the instruction
sets below.
LDR R1, [R0,
#0x08]
SUB R1, R1,
R2,...
asked 16 minutes ago -
Use proper sentence structure to communicate clearly.
Choose the correct sentence structure in each of the...
asked 16 minutes ago -
There are investors who claim they only invest in companies with
great products and outstanding management,...
asked 19 minutes ago -
what is employee/ employer relations ?
why is Employee/ Employer relation is important in the context...
asked 37 minutes ago -
Explain the relationship between tests of acquisition and
payment cycle and tests of accounts payable. Give...
asked 36 minutes ago -
A hot-air balloon is descending with a velocity of (−2.00m/s)y^.
A champagne bottle is opened to...
asked 54 minutes ago -
1. When a nearsighted person looks at an object that is in the
distance with their...
asked 2 hours ago -
QUESTION 8
Both of these statements will store the same value in the
variable $number
$number...
asked 2 hours ago -
The price of 1 lb of potatoes is $1.75. If all the potatoes sold
today at...
asked 3 hours ago -
Garcia Company issues 20.00%, 15-year bonds with a par value of
$470,000 and semiannual interest payments....
asked 3 hours ago -
In C++ Programming, Try using loops only.
This lab demonstrates the use of the While Loop...
asked 4 hours ago