Consider two independent samples: Sample 1 has 217 observations and Sample 2 has 440 observations. In...
Consider two independent samples: Sample 1 has 217 observations and Sample 2 has 440 observations. In testing H0: (mu2 - mu1) = 0 versus H1: (mu2 - mu1) LaTeX: \ne≠ 0, a t test statistic of -3.111 with 400 degrees of freedom are correctly computed. What is the P-value? (Answer as a probability, not a percent. Record your answer accurate to at least the nearest third decimal place with standard rounding.) .
Homework Answers
P value =0.002.......................by using Excel command =TDIST(ABS(-3.111),400,2)
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Consider two independent samples: Sample 1 has 217 observations
and Sample 2 has 440 observations. In...
a sample of 113 observations indicated that X1 is 71. A second sample of 157 observations indicated...
a sample of 113 observations indicated that X1 is 71. A second sample of 157 observations indicated that X2 is 95. Conduct a z-test of hypothesis about a difference in population proportions using a 0.03 significance level. H0: p1 - p2 ≥ 0 H1: p1 - p2 < 0 a)State the decision rule.Reject H0 in favour of H1 if the computed value of the statistic is less than -1.88 or greater than 1.88.Reject H0 in favour of H1 if the computed value of the statistic is greater than 2.17.Reject H0 in favour of H1 if the computed...
Independent random samples of size n1=38 and n2=86 observations, were selected from two populations. The samples...
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John has obtained two independent samples from two populations, where the sample statistics are shown in...
John has obtained two independent samples from two populations, where the sample statistics are shown in the table below. Assuming equal variances, he can construct a 95 percent confidence interval for the difference of the population means to be Sample 1 Sample 2 Mean 22.7 20.5 Variance (s^2) 5.4 3.6 Observations (sample size) 9 9 [0.08, 4.32] [1.17, 5.08] [2.44,6.19] [-0.09, 3.19] A corporate analyst is testing whether mean inventory turnover has increased. Inventory turnover in six randomly chosen product...
Suppose that X1, X2, . . . , Xn is an iid sample of N (0, σ2 ) observations, where σ 2 > 0 is unknown. Consider testing H0 : σ 2 = σ 2 0 versus H1 : σ 2 6= σ 2 0
Suppose that X1, X2, . . . , Xn is an iid sample of N (0, σ2
) observations, where σ
2 > 0 is
unknown. Consider testing
H0 : σ
2 = σ
2
0 versus H1 : σ
2
6= σ
2
0
;
where σ
2
0
is known.
(a) Derive a size α likelihood ratio test of H0 versus H1. Your rejection region should
be written in terms of a sufficient statistic.
(b) When the null...
Independent random samples of 180 observations were randomly selected from binomial populations 1 and 2, respectively....
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5. We have two independent samples of n observations X1,X2-…Xn and Yi,½, . …Ý, We want...
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5. We have two independent samples of n observations X1, X2, .. . , Xn and...
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In order to compare the means of two populations, independent random samples of 385 observations are...
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Independent random samples selected from two normal populations produced the sample means and standard deviations shown...
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In order to compare the means of two populations, independent random samples of 400 observations are...
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