Question
Test claims & create confidence interval estimates for the difference between 2 means from independent samples.
Test claims & create confidence interval estimates for the difference between 2 means from independent samples.
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Answer #1
TOPIC:Testing of hypothesis and finding the confidence interval for the difference between two population means.
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Confidence Interval for 2-Means (2 Sample T-Interval) Given two independent random samples with the following results:...
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Given two independent random samples with the following
results:
n1=11
n2=17
x1¯=118
x2¯=155
s1=18
s2=13
Use this data to find the 99% confidence interval for the true
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variances are equal and that the two populations are normally
distributed. Round values to 2 decimal places.
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30
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2
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Discuss interval estimates for the difference between two means..
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and a quantitative variable on those populations,
2. sizes and degrees of freedom of samples from those
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4. the standard deviations of those samples. Then state
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1. if a statistically significant difference was found between two means using an independent-samples t test,...
1. if a statistically significant difference was found between
two means using an independent-samples t test, which of the
following interpretations would be correct.
A) something over and above sampling error is responsible for
the difference between sample means
B) the difference between two means is meaningful.
C)it is unlikely that something other than error is responsible
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D) the difference between the two means is due to a large effect
size
2. in...
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Recall the method used to obtain a confidence interval for the
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Population 1 − Population 2.)
Element
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1
2
1
11
8
2
7
8
3
9
6
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7
5
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10
6
15
15
7
15
14
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your answer...
Consider the following statements. When estimating a confidence interval for the difference between the means of...
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populations.
(i) The variances in both populations of variable X are assumed to
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(ii) Samples should be independently and randomly selected from
the populations.
(iii) Both samples have the same variance.
A.
Only (ii) is true.
B.
Only (i) is true.
C.
Both (i) and (iii) are true.
D.
Both (ii) and (iii) are true.
Consider the following statements. When estimating a confidence interval for the difference between the means of...
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interval for the difference between the means of two independent
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(i) The variances in both populations of variable X are assumed to
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(iii) Both samples have the same variance.
A.
Only (i) is true.
B.
Only (ii) is true.
C.
Both (ii) and (iii) are true.
D.
Both (i) and (iii) are true.
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