Homework Answers
Correct answer: Option (D) right and left tail rejection regions beyond a t critical value of -3.250 in the left tail and beyond critical value of 3.250 in the right tail.
since sample size n = 10 and df = n-1 = 10-1 = 9
level of significance alpha = 0.01
Test is two tail
Critical value of t = ±3.2498 at 9df and 0.01 in two tail, from t -
tables
In Excel, t critical value can be obtained by
=T.INV.2T(0.01,9)
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Please help me, I wasn't sure which test to use so I did both of them on excel. Please let me know which is correct and answer A-C. I will give the answer a thumbs up if you can get back to me asa...
Please help me, I wasn't sure which test to use so I did both of
them on excel. Please let me know which is correct and answer A-C.
I will give the answer a thumbs up if you can get back to me
asap.
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19
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a random sample of 80 graduate students
1 (6 points). A random sample of 80 graduate students shows that 22 students have shopped online in the past year. Is there enough evidence to show that the true population proportion is lower than 60%? Conduct the test at 10% level of significance. (a) H : type of test (circle one): H: two-sided / left tail / right tail (b) What is the distribution of the test statistic? (c) Sketch a graph...
Determine the t-value in each of the cases. Click the icon to view the table of areas under the t-distribution. (a) Find the t-value such that the area in the right tail is 0.15 with 30 degrees of freedom. (Round to three decimal places as needed.) (b) Find the t-value such that the area in the right tail is 0.025 with 16 degrees of freedom. (Round to three decimal places as needed.) (c) Find the t-value such that the area...
Please help me, I wasn't sure which test to use so I did both of
them on excel. Please let me know which is correct and answer A-C.
I will give the answer a thumbs up if you can get back to me
asap.
The physicians also believe that people who are obese are more
likely to die earlier than those who are not. Again use the data in
the Framingham sample to test this theory by comparing the mean...
An education researcher claims that 54% of college students work year-round. In a random sample of 200 college students, 108 say they work year-round. At a = 0.01, is there enough evidence to reject the researcher's claim? Complete parts (a) through (e) below. (a) Identify the claim and state Ho and Ha Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do...
19
Find the critical value t for the confidence level c= 0.90 and sample size n=7. Click the icon to view the t-distribution table. 11 to (Round to the nearest thousandth as needed.) ters 5, 6, & 7 Time Ren 19 of 32 (24 complete) i t-Distribution Table - X Level of confidence, One tail, a Two tails, a d.f. d.r. 1 1 2 3 4 5 0.80 0.10 0.20 3.078 1.886 1.638 1.533 1.476 1.440 1.415 1.397 1.383 1372...
Determine the t-value in each of the cases. Click the icon to view the table of areas under the t-distribution. (a) Find the t-value such that the area in the right tail is 0.05 with 27 degrees of freedom. (Round to three decimal places as needed.) (b) Find the t-value such that the area in the right tail is 0.25 with 17 degrees of freedom. (Round to three decimal places as needed.) (c) Find the t-value such that the area...
A random sample of 36 students at a community college showed an average age of 25 years. Assume the ages of all stodents at the college are normally dists confidence interval for the average age of all students at this college is distributed with a standard deviation of 1.8 years. The 98% a 24.301 to 25.699 b.23.200 to 26.800 23.236 to 26.764 d 24.385 t0 25.615 mail Instructor estions aseb06t.9.001 More evidence against Ho is indicated by O a. lower...
Find the critical value(s) and rejection region(s) for the indicated t-test, level of significance a, and sample size n. Two-tailed test, a = 0.02, n=28 Click the icon to view the t-distribution table. The critical value(s) is/are (Round to the nearest thousandth as needed. Use a comma to separate answers as needed.) Determine the rejection region(s). Select the correct choice below and fill in the answer box(es) within your choice. (Round to the nearest thousandth as needed.) OB. << O...
You are sasting a daim and incomecty use the nemal samping detritbuion instead of the 1-samping dstrbufion Does thies make t more or less ely to reject the nul hypothesis? is this resvult the same ne matter thether the test is left-tailed, right-talled, or two laiked? Explain your reasoning s the rall hypothesis more or less likely to be rejected? Explain distribution. Therefore, E you incorrectly use a standard tor degrees of teedom less than 30轵lal of the curve are...
a through d please
To test Ho = 50 versus Hy < 50, a random sample of size n=23 is obtained from a population that is known to be normally distributed. Complete parts (a) through (d) below. Click here to view the t-Distribution Area in Right Tail (a) If x = 46 4 and s= 12.9, compute the test statistic. to-(Round to three decimal places as needed) (b) If the researcher decides to test this hypothesis at the a=0.05 level...
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