Question
****Show all work please, no exel!!!! 1. Calculate a t-test for independent samples on the following...
****Show all work please, no exel!!!!
1. Calculate a t-test for independent samples on the following data. What is the value of t obt?
group 1 : 45,50,55,60,65
group 2: 60,70,80,90,100
2. The 95% confidence interval of the mean for mean = 13, s = 1.6 and N = 21 is:
3.
-
Chi-squared :
X Y Row Marginals
A: 60, 30, 90
B: 18, 40, 58
Column Marginal: 78, 70, 140
Homework Answers
Answer #1
1. Let 
denote the means for Group 1 and Group 2 respectively.
2.
Not the answer you're looking for?
Similar Questions
HW 6: z-test, t-test for independent samples, t-test for related samples, 1-way ANOVA Researchers wanted to...
HW 6: z-test, t-test for independent samples, t-test for related
samples, 1-way ANOVA
Researchers wanted to explore different treatment methods to
effect memory skills in high school freshmen. Subjects were given a
memory test (under multiple conditions) these were the results:
Group 1
10, 8, 9, 11,
8, 9, 7, 6,
9, 8
Group 2
12, 10,
11, 9, 13, 8, 9, 12, 11, 11
Group 3
10, 9, 10, 9, 11,
8, 7, 9, 10, 11...
Independent Samples t-test Discussion Please make up your own independent samples t-test. Provide the following: IV...
Independent Samples t-test Discussion
Please make up your own independent samples t-test.
Provide the following:
IV (with 2 levels):
DV:
Ha:
Ho:
Assume you are conducting a 2 independent samples t-test with the following information SAMPLE 1 SAMPLE...
Assume you are conducting a 2 independent samples t-test with
the following information
SAMPLE 1
SAMPLE 2
SAMPLE SIZE (n)
30
25
SAMPLE MEAN
42
39
The pooled estimate of the common variance is 18.
What is the value of the test statistic, tc ? Include
2 decimal places in your answer.
For questions 1 through 3 state the proper t-test (one sample, paired samples, independent samples) that...
For questions 1 through 3 state the proper t-test (one
sample, paired samples, independent samples) that should be used to
evaluate the research question: (*Just state the test)
1) A developmental psychologist wants to determine if
a recently created computer training program can increase the
working memory ability of high-school students. A sample of 40
students are given the reverse digit span test at the beginning of
the school year and then again after 4 weeks of training. Are there...
1. A researcher is comparing scores from two treatment groups using independent samples t test. Use...
1. A researcher is comparing scores from two treatment groups
using independent samples t test. Use a Hartley’s
F-max test to examine this assumption (each group has 6
participants, s2 in group 1 is 20, and s2 in
group 2 is 15, set alpha level at .05). Also, how should this
researcher estimate the standard error in the independent samples
t test?
What is the appropriate statistical analysis to use: t-test for two independent samples, t-test for dependent...
What is the appropriate statistical analysis to use: t-test for
two independent samples, t-test for dependent samples, ANOVA, or
chi-square test of independence? Please identify and explain why it
is appropriate. (a) A study was conducted to see whether monetary
incentives to use less water during times of drought had an effect
on water usage. Sixty single-family homeowners were randomly
assigned to one of two groups: 1) monetary incentives and 2) no
monetary incentives. At the end of three months,...
An independent-samples t test is performed on the samples below: Sample 1: M = 24.1, s2...
An independent-samples t test is performed on the
samples below:
Sample 1: M = 24.1, s2 = 32.02,
n = 10
Sample 2: M = 19.4, s2 = 44.46,
n = 10
a.)Calculate the standard error for the t test
(sM1-M2). (Round to 4 decimal
places.)
b.)Calculate the degrees of freedom for the t test.
c.)Find the critical value of t with two tails and
alpha = 0.05. (Keep 3 decimal places.)
d.)Calculate the t test. (Round answer to two decimal
places.)
The following independent samples show the delivery times for two suppliers of raw materials (in days). A...
The following independent samples show the delivery times for
two suppliers of raw materials (in days). A company
currently uses Supplier A but will switch to Supplier B if its
average delivery time is less than that for Supplier A. (1
point)
Supplier A
Supplier B
10
12
13
13
12
14
14
10
14
8
12
8
10
12
3
6
15
4
7
6
2
4
18
16
20
18
9
4
5
8
t-Test: Two-Sample Assuming Unequal
Variances...
: Identify IV, DV, and hypotheses and evaluate the null hypothesis for an independent samples t...
: Identify IV, DV, and hypotheses and evaluate
the null hypothesis for an independent samples t test.
Data: Use the information from Problem Set
3.7.
Instructions: Complete the following:
Minutes of practice:
Group 1: 34, 25, 4, 64, 14, 49, 54
Group 2: 24, 78, 59, 68, 84, 79,
57
a. Identify the IV and DV
in the study.
b. State the null
hypothesis and the directional (one-tailed) alternative
hypothesis.
c. Can you reject the null
hypothesis at α =...
Question 3: Independent-Samples t-Test Group Statistics type of school N Mean Std. Deviation Std. Error Mean...
Question 3: Independent-Samples t-Test
Group
Statistics
type of school
N
Mean
Std. Deviation
Std. Error Mean
reading score
public
168
51.8452
10.42279
.80414
private
32
54.2500
9.19677
1.62578
Independent
Samples Test
Levene's Test for
Equality of Variances
t-test for Equality of
Means
F
Sig.
t
df
Sig. (2-tailed)
Mean Difference
Std. Error
Difference
95% Confidence
Interval of the Difference
Lower
Upper
reading score
Equal variances
assumed
.564
.453
-1.217
198
.225
-2.40476
1.97519
-6.29986
1.49034
Equal variances not
assumed
-1.326...
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 10 minutes ago
asked 28 minutes ago
asked 30 minutes ago
asked 42 minutes ago
asked 56 minutes ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 2 hours ago