THERE ARE FOUR PARTS TO THIS POST. PLEASE ANSWER ALL FOUR PLEASE!!! SS MEANS SUM

Question

THERE ARE FOUR PARTS TO THIS POST. PLEASE ANSWER ALL FOUR PLEASE!!! SS MEANS SUM SQUARED

1. An independent-samples experiment uses one sample with n = 10 and a second sample
with n = 15 to compare two experimental treatments. The t statistic from this experiment
will have degrees of freedom equal to ___________.
a) 23
b) 24
c) 25
d) cannot be determined with unequal sample sizes

2. An independent-samples research study with n = 6 participants in EACH treatment has
SS = 70 for Treatment 1 and SS = 50 for Treatment 2. For these data, the estimated
standard error for sample mean difference is ________.

a) 4

b) 12

c) 120

d) 2

3. A researcher conducts a study comparing two treatment conditions and obtains 20
scores in each treatment. If the researcher used a related samples/repeated-measures
design, then how many subjects participated in the research study?

a) 10

b) 20

c) 21

d) 40

4. Two separate samples, each with n = 4, are used to test the effects of two competing
sports drinks on athletic performance. What would be the critical value for this test if alpha
= .01 at two-tails?

a) ±3.143
b) ±2.998
c) ±3.707
d) ±2.580

Explanation / Answer

Solution:-

1) option a) 23

Explanation:- df = n1+n2-2 = 10+15-2 = 25-2 = 23

2) option d) 2

3) option b) 20

4) option c) ±3.707

Explanation: The following information is provided: the requested significance level is =0.01, for the two-tailed case. df = 8-2 = 6

The t-critical values for a two-tailed test, for a significance level of =0.01 are

tc=3.707 and tc=3.707

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