Homework Answers
A) Left tailed test
Since the alternative hypothesis is of '<' type, we need to find the area to the left of normal curve to reach a conclusion about the hypothesis. Hence this is a left tailed test.
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D. estimates the population standard deviation 11: The hypotheses Ho:u=80, H.: u< 80 would require: A....
Consider the following hypothesis test Ho:u=115 H1:u<115 a=0.05 A sample of n=6, xbar=110, and s=3.5 Determine...
Consider the following hypothesis test Ho:u=115 H1:u<115 a=0.05 A sample of n=6, xbar=110, and s=3.5 Determine the p value (use interpolation):
Consider the following null and alternative hypotheses: Ho: p=0.16 He: p <0.16 These hypotheses O a)...
Consider the following null and alternative hypotheses: Ho: p=0.16 He: p <0.16 These hypotheses O a) indicate a one-tailed test with a rejection area in the right tail b) are not mutually exclusive O c) indicate a two-tailed test d) are established incorrectly e) indicate a one-tailed test with a rejection area in the left tail
You wish to test Ho:u = 61.5 versus Haid < 61.5 at a significance level of...
You wish to test Ho:u = 61.5 versus Haid < 61.5 at a significance level of 0.10. You obtain a sample of size 17 with a mean of 59.4 and a standard deviation of 17.2. You believe that the population is normally distributed. ROUND YOUR ANSWERS TO THREE DECIMAL PLACES. (a). What is the test statistic? Do not round your interim calculations. (b). Using your answer from part (a), find the p-value. (c). What is the critical value for this...
Assume that z-scores are normally distributed with a mean of O and a standard deviation of...
Assume that z-scores are normally distributed with a mean of O and a standard deviation of 1. If P(0 < z < a) = 0.4857, find a. a = (Round to two decimal places.)
Consider the following hypotheses: Ho: mean = 5 H: mean < 5 A test is performed...
Consider the following hypotheses: Ho: mean = 5 H: mean < 5 A test is performed with a sample of size 25. The sample mean was 4.68 and the population standard deviation is 1.2. Assume that the population is approximately normal. Use the TI-84 PLUS calculator to compute the P-value. Round your answer to four decimal places (for example: 0.0138). Write only a number as your answer. Your Answer: Answer
= 20 versus H,: <20. A sample of size n=52 is drawn, and x = 18....
= 20 versus H,: <20. A sample of size n=52 is drawn, and x = 18. The population standard deviation A test is made of H: is o=6 (a) Compute the value of the test statistic Z. (b) is Ho rejected at the a=0.05 level? (c) Is H, rejected at the a=0.01 level?
You wish to test Ho:u= 77.1 versus H :u > 77.1 at a significance level of...
You wish to test Ho:u= 77.1 versus H :u > 77.1 at a significance level of 0.10. You obtain a sample of size 20 with a mean of 79.4 and a standard deviation of 8.5. You believe that the population is normally distributed. ROUND ALL ANSWERS TO THREE DECIMAL PLACES. (a). What is the test statistic? Do not round any interim calculations. (b). Using your answer from part (a), find the p-value. (c). What is the critical value for this...
The one-sample t-statistic for a test of Ho: = 42 versus H:# < 42 based on...
The one-sample t-statistic for a test of Ho: = 42 versus H:# < 42 based on n = 15 observations has the value t = -2.138, where H, and Hare the null and alternative hypotheses, respectively. The sample size is denoted by n.
On average, 1.7 million people were expected to be diagnosed with cancer this year. If a...
On average, 1.7 million people were expected to be diagnosed
with cancer this year. If a hypothesis test is to be conducted to
test the claim, what are the appropriate hypotheses?
A)
vs.
B)
vs.
C)
vs.
D)
vs.
E)
vs.
Ηρ: μ = 1.7 HA: μ + 1.7 Ηρ: μΣ 1.7 Η: μ< 1.7 Ηρ: μ: 1.7 Η: μ1.7 H,:* < 1.7 HA: > 1.7 H: > 1.7 HA: < 1.7
How do you solve for the P-value? In a hypothesis test with hypotheses Ho : j...
How do you solve for the P-value?
In a hypothesis test with hypotheses Ho : j < 54 and H1 :u > 54, a random sample of 24 elements selected from the population produced a mean of 59.0 and a standard deviation of 14.0. The test is to be made at the 2.5% significance level. Assume the population is normally distributed. What is the critical value of t? 1.96 02.064 • 2.069 -2.069 What is the value of the test...
Consider the following hypothesis test Ho:u=115 H1:u<115 a=0.05 A sample of n=6, xbar=110, and s=3.5 Determine the p value (use interpolation):
Consider the following null and alternative hypotheses: Ho: p=0.16 He: p <0.16 These hypotheses O a) indicate a one-tailed test with a rejection area in the right tail b) are not mutually exclusive O c) indicate a two-tailed test d) are established incorrectly e) indicate a one-tailed test with a rejection area in the left tail
You wish to test Ho:u = 61.5 versus Haid < 61.5 at a significance level of 0.10. You obtain a sample of size 17 with a mean of 59.4 and a standard deviation of 17.2. You believe that the population is normally distributed. ROUND YOUR ANSWERS TO THREE DECIMAL PLACES. (a). What is the test statistic? Do not round your interim calculations. (b). Using your answer from part (a), find the p-value. (c). What is the critical value for this...
Assume that z-scores are normally distributed with a mean of O and a standard deviation of 1. If P(0 < z < a) = 0.4857, find a. a = (Round to two decimal places.)
Consider the following hypotheses: Ho: mean = 5 H: mean < 5 A test is performed with a sample of size 25. The sample mean was 4.68 and the population standard deviation is 1.2. Assume that the population is approximately normal. Use the TI-84 PLUS calculator to compute the P-value. Round your answer to four decimal places (for example: 0.0138). Write only a number as your answer. Your Answer: Answer
= 20 versus H,: <20. A sample of size n=52 is drawn, and x = 18. The population standard deviation A test is made of H: is o=6 (a) Compute the value of the test statistic Z. (b) is Ho rejected at the a=0.05 level? (c) Is H, rejected at the a=0.01 level?
You wish to test Ho:u= 77.1 versus H :u > 77.1 at a significance level of 0.10. You obtain a sample of size 20 with a mean of 79.4 and a standard deviation of 8.5. You believe that the population is normally distributed. ROUND ALL ANSWERS TO THREE DECIMAL PLACES. (a). What is the test statistic? Do not round any interim calculations. (b). Using your answer from part (a), find the p-value. (c). What is the critical value for this...
The one-sample t-statistic for a test of Ho: = 42 versus H:# < 42 based on n = 15 observations has the value t = -2.138, where H, and Hare the null and alternative hypotheses, respectively. The sample size is denoted by n.
On average, 1.7 million people were expected to be diagnosed
with cancer this year. If a hypothesis test is to be conducted to
test the claim, what are the appropriate hypotheses?
A)
vs.
B)
vs.
C)
vs.
D)
vs.
E)
vs.
Ηρ: μ = 1.7 HA: μ + 1.7 Ηρ: μΣ 1.7 Η: μ< 1.7 Ηρ: μ: 1.7 Η: μ1.7 H,:* < 1.7 HA: > 1.7 H: > 1.7 HA: < 1.7
How do you solve for the P-value?
In a hypothesis test with hypotheses Ho : j < 54 and H1 :u > 54, a random sample of 24 elements selected from the population produced a mean of 59.0 and a standard deviation of 14.0. The test is to be made at the 2.5% significance level. Assume the population is normally distributed. What is the critical value of t? 1.96 02.064 • 2.069 -2.069 What is the value of the test...
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