Homework Answers
b) Degrees of freedom = (3 - 1) * (4 - 1) = 6
Hence,
P - Value = P(
> 11.783) = 0.067
c) Option B is correct.
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A researcher interested in personal health habits asked a random sample of 3209 people how many...
A researcher interested in personal health habits asked a random sample of 3114 people how many...
A researcher interested in personal health habits asked a random sample of 3114 people how many times they usually worked out per week, and their level of educational attainment. 0 High school Undergraduate degree Graduate degree 196 268 147 Weekly workouts 1-2 3-5 221 315 367 493 207 346 6+ 187 266 101 (a) Which hypotheses should they test? Ho: Number of weekly workouts is not related to educational attainment vs. Ha: Number of weekly workouts is related to educational...
A researcher interested in personal health habits asked a random sample of 2839 people how many...
A researcher interested in personal health habits asked a random sample of 2839 people how many times they usually worked out per week, and their level of educational attainment. High school Undergraduate degree Graduate degree 0 166 207 151 Weekly workouts 1-2 3-5 187 305 352 597 165 276 6+ 106 213 112 (a) Which hypotheses should they test? O Ho: Number of weekly workouts is related to educational attainment vs. Hy: Number of weekly workouts is not related to...
A random sample of size ny = 36 yields a variance of 6.2, and a random...
A random sample of size ny = 36 yields a variance of 6.2, and a random sample of size n2 = 37 yields a variance of 8.4. At a = 0.01, test the claim that the variance of Population 1 is less than the variance of Population 2. 1. The alternate hypothesis is Ha: si < 82 Οσι < σ2 oo <o Osi <s 2. This is a left tailed test with: dfn- and dfa - 3a. The STS (to...
A random sample of size ni = 30 yields a standard deviation of 8.5, and a...
A random sample of size ni = 30 yields a standard deviation of 8.5, and a random sample of size n2 = 31 yields a standard deviation of 6.6. At a = 0.01, test the claim that the standard deviation of Population 1 is not the standard deviation of Population 2. 1. The alternate hypothesis is Ha: Oo o 0917 02 Os s Osi #s2 2. This is a two tailed test with: dfn= and dfa - 3a. The STS...
The table below contains the results from random samples of two populations. Sample 1 38.1 35.3...
The table below contains the results from random samples of two populations. Sample 1 38.1 35.3 43.2 40.4 43.8 wa 34.9 39.7 ca 35.8 293 41.3 47.1 45.4 35 Sample 2 35.1 42.4 33.1 41.9 53.5 10 40.6 18 33.8 20 48.9 23 33.6 18.5 44.5 53.7 At a = 0.10, test the claim that the variance of Population 1 is not the same as the variance of Population 2. 1. The alternate hypothesis is Ha: 001702 81 #82 Oss...
The table below contains the results from random samples of two populations. Sample 51.6 40.3 36.9...
The table below contains the results from random samples of two populations. Sample 51.6 40.3 36.9 34.7 34.7 40.2 40.2 43 32.6 Sample 2 32.3 35.8 37.7 40.8 40.5 45.1 34.2 29.3 43 45 365 30.5 28.2 44.7 29.4 29.4 43.7 44.7 41.5 33.5 At a = 0.10, test the claim that the standard deviation of Population 1 is less than the standard deviation of Population 2. 1. The alternate hypothesis is Ha: Os <s Οσι < σ2 OO <o...
Based on information from a previous study, r = 34 people out of a random sample...
Based on information from a previous study, r = 34 people out of a random sample of n = 101 adult Americans who did not attend college believe in extraterrestrials. However, out of a random sample of n2 = 101 adult Americans who did attend college, '2 = 47 claim that they believe in extraterrestrials. Does this indicate that the proportion of people who attended college and who believe in extraterrestrials is higher than the proportion who did not attend...
Independent random samples of n = 150 and n = 150 observations were randomly selected from...
Independent random samples of n = 150 and n = 150 observations were randomly selected from binomial populations 1 and 2, respectively. Sample 1 had 68 successes, and sample 2 had 74 successes. You wish to perform a hypothesis test to determine if there is a difference in the sample proportions P, and py: (a) State the null and alternative hypotheses. O Ho: (P1 - P2) = 0 versus Ha: (P1-P2) < 0 O Ho: (2,-) < versus H: (2,-2)...
A state-by-state survey found that the pro tions of adults who are smokers i state A...
A state-by-state survey found that the pro tions of adults who are smokers i state A and state were 21.0% and 25 2% especie y Suppose the number ofrespondents om each gate was 3000 At α=0.05, can you su port the e aim that the proportion of adults wh are smokers greater in state A than in staa B? Assumǚ the random sample; ara indapan dant. Com late parts (a) through (e). (a) Identify the daim and state HandH The...
The table below gives results from random samples of weights (in pounds) of men and women....
The table below gives results from random samples of weights (in pounds) of men and women. Pop Gender 1 Men 2 Women n s 40 8.7 33 10.6 At a 0.05, test the claim that weights of men are more consistent than weights of women. 1. The alternate hypothesis is Ha: Osı > S2 O si <S2 Οσι < σ2 Oo > 02 2. This is a left tailed test with: df and dfa 3a. The STS (to 2 decimals)...
A researcher interested in personal health habits asked a random sample of 3114 people how many times they usually worked out per week, and their level of educational attainment. 0 High school Undergraduate degree Graduate degree 196 268 147 Weekly workouts 1-2 3-5 221 315 367 493 207 346 6+ 187 266 101 (a) Which hypotheses should they test? Ho: Number of weekly workouts is not related to educational attainment vs. Ha: Number of weekly workouts is related to educational...
A researcher interested in personal health habits asked a random sample of 2839 people how many times they usually worked out per week, and their level of educational attainment. High school Undergraduate degree Graduate degree 0 166 207 151 Weekly workouts 1-2 3-5 187 305 352 597 165 276 6+ 106 213 112 (a) Which hypotheses should they test? O Ho: Number of weekly workouts is related to educational attainment vs. Hy: Number of weekly workouts is not related to...
A random sample of size ny = 36 yields a variance of 6.2, and a random sample of size n2 = 37 yields a variance of 8.4. At a = 0.01, test the claim that the variance of Population 1 is less than the variance of Population 2. 1. The alternate hypothesis is Ha: si < 82 Οσι < σ2 oo <o Osi <s 2. This is a left tailed test with: dfn- and dfa - 3a. The STS (to...
A random sample of size ni = 30 yields a standard deviation of 8.5, and a random sample of size n2 = 31 yields a standard deviation of 6.6. At a = 0.01, test the claim that the standard deviation of Population 1 is not the standard deviation of Population 2. 1. The alternate hypothesis is Ha: Oo o 0917 02 Os s Osi #s2 2. This is a two tailed test with: dfn= and dfa - 3a. The STS...
The table below contains the results from random samples of two populations. Sample 1 38.1 35.3 43.2 40.4 43.8 wa 34.9 39.7 ca 35.8 293 41.3 47.1 45.4 35 Sample 2 35.1 42.4 33.1 41.9 53.5 10 40.6 18 33.8 20 48.9 23 33.6 18.5 44.5 53.7 At a = 0.10, test the claim that the variance of Population 1 is not the same as the variance of Population 2. 1. The alternate hypothesis is Ha: 001702 81 #82 Oss...
The table below contains the results from random samples of two populations. Sample 51.6 40.3 36.9 34.7 34.7 40.2 40.2 43 32.6 Sample 2 32.3 35.8 37.7 40.8 40.5 45.1 34.2 29.3 43 45 365 30.5 28.2 44.7 29.4 29.4 43.7 44.7 41.5 33.5 At a = 0.10, test the claim that the standard deviation of Population 1 is less than the standard deviation of Population 2. 1. The alternate hypothesis is Ha: Os <s Οσι < σ2 OO <o...
Based on information from a previous study, r = 34 people out of a random sample of n = 101 adult Americans who did not attend college believe in extraterrestrials. However, out of a random sample of n2 = 101 adult Americans who did attend college, '2 = 47 claim that they believe in extraterrestrials. Does this indicate that the proportion of people who attended college and who believe in extraterrestrials is higher than the proportion who did not attend...
Independent random samples of n = 150 and n = 150 observations were randomly selected from binomial populations 1 and 2, respectively. Sample 1 had 68 successes, and sample 2 had 74 successes. You wish to perform a hypothesis test to determine if there is a difference in the sample proportions P, and py: (a) State the null and alternative hypotheses. O Ho: (P1 - P2) = 0 versus Ha: (P1-P2) < 0 O Ho: (2,-) < versus H: (2,-2)...
A state-by-state survey found that the pro tions of adults who are smokers i state A and state were 21.0% and 25 2% especie y Suppose the number ofrespondents om each gate was 3000 At α=0.05, can you su port the e aim that the proportion of adults wh are smokers greater in state A than in staa B? Assumǚ the random sample; ara indapan dant. Com late parts (a) through (e). (a) Identify the daim and state HandH The...
The table below gives results from random samples of weights (in pounds) of men and women. Pop Gender 1 Men 2 Women n s 40 8.7 33 10.6 At a 0.05, test the claim that weights of men are more consistent than weights of women. 1. The alternate hypothesis is Ha: Osı > S2 O si <S2 Οσι < σ2 Oo > 02 2. This is a left tailed test with: df and dfa 3a. The STS (to 2 decimals)...
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