critical value for t = 1.699(right tailed) or +or- 2.045(Two tailed) at 95% confidence and df = n-1 = 29
t stat > t critical
and p = 0.050012
P value > 0.05
so we do not reject H0
do i reject or not? form (e.g. 72.4218 not 0.724218) and then round to four decimal...
You are only willing to reject the null hypothesis if you achieve 95% confidence or better. Consider the following information: Họ : 4 = 10 t = 2.102 n=1001 Select the appropriate conclusion below. Hint: you'll need to find the critical value for t using a t-table Do not reject the Null Hypothesis Reject the Null Hypothesis You are only willing to reject the null hypothesis if you achieve 95% confidence or better. Consider the following information: H : 7...
Score: 0 of 2 pts 6 of 8 (0 complete) HW Score: 0%, 0 of 16 pts i Question Help * Examine the following hypothesis test with n 16, s 5, and x 27 Ho: μ 32 Ha: μ < 32 α : 0.01 a. State the decision rule in terms of the critical value of the test statistic. b. State the calculated value of the test statistic. c. State the conclusion a. State the decision rule. Select the correct...
6. Decision Regarding Null Hypothesis If your observed test statistic (e.g., z or t) falls in the critical region, then you should_______________. (choose one) Reject the alternative hypothesis Reject the null hypothesis Do not reject the null hypothesis Change majors
A travel agent states that the mean meal price for a family of four in a resort town is at most $100. You decide to test this claim and you take a random sample of meal prices in the resort town. You find that for 33 meals for family of four the mean price is $110 with a standard deviation of $21. Is there enough evidence to reject the travel agent's claim? (a=.05) what test will you use? T test...
Do I reject the null and is
there or not sufficient evidence?
A company selling licenses for new e-commerce computer software advertises that firms using this software obtain, on average during the first year, a yield of 10% on their initial investments. A random sample of 10 of these franchises produced the yields shown below for the first year of operation. 6.8 9.9 11.4 8.4 12. 1 4 3 8.3 10.3 9.3 8.8 Assuming that population yields are normally distributed,...
uppose that I gathered a random sample of 5 people and surveyed
them about their GPA. The results are listed below.
Student
GPA
A
3
B
2.49
C
1.65
D
1.91
E
3.05
I hypothesize that the population mean for GPA is 3.16. What is the
t-statistic for my sample mean given this null hypothesis?
What is the critical value for the t-statistic at the 95%
confidence level when you have 5 observations?
Hint: You'll need a t-table. Round your...
Joyce works in a toy factory maintaining machines. Machines should inject exactly 500 grams of plastic into a mold to make a toy plane. Joyce wonders if these toy machines might need cleaning, but it's a lot of work taking apart the machines to do a proper job. She grabs planes from 24 different machines at random and weighs them. Her average is 495 grams. She knows there's a standard devation of 10 grams for all machines (Joyce has been...
ill in the blank is 1. reject/do not reject 2. provide/does not
provide and 3. less than, the same as, greater than, different
from
Suppose the mean height of women age 20 years or older in a certain country is 62.6 inches. One hundred randomly selected women in a certain city had a mean height o 61.0 inches. At the 5% significance level do the data provide sufficient evidence to conclude that the mean he t o wormer c differs...
Ho H234 Hu μ<34 α:0025 a State the decision rule in terms of the critical value of the test statistic b State the calculated value of the test statistic (Round to four decimal places as needed) OA. Reject the nwull hypothesls if the calculated vaue of the test statistic, t, les than the crical vakuve of or greator than he crlical vave ofOtherwise do nat j OB. Reject the null hypothesis if the calculated valkue of the test stalistic,t is...
In a sample of credit card holders the mean monthly value of credit card purchases was $ 400 and the sample variance was 67 ($ squared). Assume that the population distribution is normal. Answer the following, rounding your answers to two decimal places where appropriate. (a) Suppose the sample results were obtained from a random sample of 12 credit card holders. Find a 95% confidence interval for the mean monthly value of credit card purchases of all card holders. ( , )...