Question
In: Statistics and Probability
Do a two-sample test for equality of means assuming unequal variances. Calculate the p-value using Excel....
Do a two-sample test for equality of means assuming unequal
variances. Calculate the p-value using Excel.
(a-1) Comparison of GPA for randomly chosen
college juniors and seniors:
x¯1x¯1 = 4.75, s1 = .20, n1
= 15, x¯2x¯2 = 5.18, s2 = .30,
n2 = 15, α = .025, left-tailed
test.
(Negative values should be indicated by a minus sign. Round
down your d.f. answer to the nearest whole number and
other answers to 4 decimal places. Do not use "quick" rules for
degrees of freedom.)
| d.f. = | |
| t-calculated = | |
| p-value = | |
| t-critical = | |
(a-2) Based on the above data choose the correct
decision.
-
Do not reject the null hypothesis
-
Reject the null hypothesis
(b-1) Comparison of average commute miles for
randomly chosen students at two community colleges:
x¯1x¯1 = 25, s1 = 5, n1 =
22, x¯2x¯2 = 33, s2 = 7, n2
= 19, α = .05, two-tailed test.
(Negative values should be indicated by a minus sign. Round
down your d.f. answer to the nearest whole number and
other answers to 4 decimal places. Do not use "quick" rules for
degrees of freedom.)
| d.f. = | |
| t-calculated = | |
| p-value = | |
| t-critical = | +/- |
(b-2) Based on the above data choose the correct
decision.
-
Reject the null hypothesis
-
Do not reject the null hypothesis
(c-1) Comparison of credits at time of graduation
for randomly chosen accounting and economics students:
x¯1x¯1 = 150, s1 = 2.8, n1
= 12, x¯2x¯2 = 143, s2 = 2.7,
n2 = 17, α = .05, right-tailed
test.
(Negative values should be indicated by a minus sign. Round
down your d.f. answer to the nearest whole number and
other answers to 4 decimal places. Do not use "quick" rules for
degrees of freedom.)
| d.f. = | |
| t-calculated = | |
| p-value = | |
| t-critical = | |
(c-2) Based on the above data choose the correct
decision.
-
Reject the null hypothesis
-
Do not reject the null hypothesis
Solutions
orchestra answered 2 years agoRelated Solutions
Do a two-sample test for equality of means assuming unequal variances. Calculate the p-value using Excel....
Do a two-sample test for equality of means assuming unequal
variances. Calculate the p-value using Excel.
(a-1) Comparison of GPA for randomly chosen
college juniors and seniors:
x¯1x¯1 = 4.75, s1 = .20, n1
= 15, x¯2x¯2 = 5.18, s2 = .30,
n2 = 15, α = .025, left-tailed
test.
(Negative values should be indicated by a minus sign. Round
down your d.f. answer to the nearest whole number and
other answers to 4 decimal places. Do not use "quick"...
Do a two-sample test for equality of means assuming unequal variances. Calculate the p-value using Excel....
Do a two-sample test for equality of means assuming unequal
variances. Calculate the p-value using Excel.
(a-1)
Comparison of GPA for randomly chosen college juniors and
seniors:
x⎯⎯1x¯1 = 4, s1 = .20,
n1 = 15, x⎯⎯2x¯2 = 4.25, s2
= .30, n2 = 15, α = .025, left-tailed
test.
(Negative values should be indicated by a minus sign.
Round down your d.f. answer to the nearest whole number
and other answers to 4 decimal places.)
d.f.
t-calculated
...
Do a two-sample test for equality of means assuming unequal variances. Calculate the p-value using Excel....
Do a two-sample test for equality of means assuming unequal
variances. Calculate the p-value using Excel.
(a-1) Comparison of GPA for randomly chosen
college juniors and seniors:
x⎯⎯1x¯1 = 4.05, s1 = .20,
n1 = 15, x⎯⎯2x¯2 = 4.35, s2
= .30, n2 = 15, α = .025, left-tailed
test.
(Negative values should be indicated by a minus sign. Round
down your d.f. answer to the nearest whole number and
other answers to 4 decimal places. Do not use "quick"...
Do a two-sample test for equality of means assuming unequal variances. Calculate the p-value using Excel....
Do a two-sample test for equality of means assuming unequal
variances. Calculate the p-value using Excel.
(a-1) Comparison of GPA for randomly chosen
college juniors and seniors:
x¯1x¯1 = 4, s1 = .20, n1 =
15, x¯2x¯2 = 4.25, s2 = .30,
n2 = 15, α = .025, left-tailed
test.
(Negative values should be indicated by a minus sign. Round
down your d.f. answer to the nearest whole number and
other answers to 4 decimal places. Do not use "quick"...
Do a two-sample test for equality of means assuming unequal variances. Calculate the p-value using Excel....
Do a two-sample test for equality of means assuming unequal
variances. Calculate the p-value using Excel.
(a-1) Comparison of GPA for randomly chosen
college juniors and seniors:
x¯1x¯1 = 4, s1 = .20, n1 =
15, x¯2x¯2 = 4.25, s2 = .30,
n2 = 15, α = .025, left-tailed
test.
(Negative values should be indicated by a minus sign. Round
down your d.f. answer to the nearest whole number and
other answers to 4 decimal places. Do not use "quick"...
Do a two-sample test for equality of means assuming unequal variances. Calculate the p-value using Excel....
Do a two-sample test for equality of means assuming unequal
variances. Calculate the p-value using Excel.
(a-1) Comparison of GPA for randomly chosen
college juniors and seniors:
x⎯⎯1x¯1 = 4.75, s1 = .20,
n1 = 15, x⎯⎯2x¯2 = 5.18, s2
= .30, n2 = 15, α = .025, left-tailed
test.
(Negative values should be indicated by a minus sign. Round
down your d.f. answer to the nearest whole number and
other answers to 4 decimal places. Do not use "quick"...
Independent Samples Test Levene's Test for Equality of Variances t-test for Equality of Means F Sig....
Independent
Samples Test
Levene's Test for
Equality of Variances
t-test for Equality of
Means
F
Sig.
t
df
Sig. (2-tailed)
F1
Equal variances
assumed
12,130
,151
-1,967
194
,052
Equal variances not
assumed
-2,010
184,290
,046
A researcher thinks that mean value for F1 of the male is bigger
than that of female. (mu1 female, mu2
male)
Write down the hypothesis, p- value and
conclusion.
One Hypothesis test is an F test for the equality of the variances of travel Times and the second test is a T-test for the equality of the means of travel times in MINUTES.
One Hypothesis test is an F test for the equality of the variances of travel Times and the second test is a T-test for the equality of the means of travel times in MINUTES. The F test must be performed first in order to select either Case1 or Case 2 for the T-test as listed in chapter 5. Then perform the Required T-test (either case 1 or 2 depending on your findings of the F-test). Also in the Conclusion...
In excell t-Test Assuming Equal Variances t-Test With Paired Two Samples for Means Analysis of Variance...
In excell
t-Test Assuming Equal Variances
t-Test With Paired Two Samples for Means
Analysis of Variance
Correlation Coefficient
Simple Regression
Skills and self-esteem are believed to influence job
performance. To investigate this, an experimenter split 14 recent
parolees into "high skill and self-esteem" and "low skill and
self-esteem" groups. Three months later, employers were asked to
rate each parolee’s job performance on a standard test that gives
ratings from 1 to 10, with 10 being the highest. The following
ratings...
In order to test the equality of variances in the yield per plant of two varieties,...
In order to test the equality of variances in the yield per
plant of two varieties, two independent random samples, one for
each variety of plants were selected leading to the following
summary results: Variaty Number of Plants Total Yield Sum of
Squares of Yield 1 10 240 5823 2 12 276 6403 Is the claim of
equality of variances supported by the data? Use α = 0.05. Assume
the two populations to be normally distributed. [5 Marks
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