PROBLEM SET 1 t-test for Two Independent Samples Important Terms-ation Differences bru Samelc laHion research design that vses a serarate grave of means based on all possible pairs of random Samples from tm poPuLations Between subject design > ratieanas for each treatment condition (one (onginon= sihmple exPeviment Difference between sample means Difference between population means Pooled variance estimatesetima te of a foenanons Estimated standard error of the difference between means ( many conditions comeiex সলা data from two a move sampies rariance Obtained by combin ingpoolin g ハイe Sta error yên the vaCnan PoRvdtion hardor derimust be estimated A team of sleep researchers believe that retention will be better when sleep comes immediately ぐ oseo after learning than when it is delayed. In an experiment, participants learned a list of words and were then tested for retention after 24 hours. One group of participants went immediately to bed for 8 hours after learning and then spent the remaining 16 hours of the retention interval going about their usual daily activities. The other group of participants stayed awake for 16 hours and then slept the last 8 hours of the retention interval. Word recall was better for the Immediate Sleep Group than for the Delayed Sleep Group. Following are the recall scores. Immediate Sleep Delayed Sleep 8. 7 4 1. Independent variable. 2. Dependent variable. 3. Is this a within or between subject design? Explain. 4. Experimental hypothesis. 5. Is this a directional or nondirectional hypothesis? Draw a curve and indicate the rejection region(s). 6. Null hypothesis. 7. Statistical hypotheses. 8. Compute the group means. Are the means in the predicted direction? 9. N= 10. Decision rule (.05). -41- 4, 9,
PROBLEM SET 1 t-test for Two Independent Samples Important Terms-ation Differences bru Samelc laHion research design that vses a serarate grave of means based on all possible pairs of random Samples from tm poPuLations Between subject design > ratieanas for each treatment condition (one (onginon= sihmple exPeviment Difference between sample means Difference between population means Pooled variance estimatesetima te of a foenanons Estimated standard error of the difference between means ( many conditions comeiex সলা data from two a move sampies rariance Obtained by combin ingpoolin g ハイe Sta error yên the vaCnan PoRvdtion hardor derimust be estimated A team of sleep researchers believe that retention will be better when sleep comes immediately ぐ oseo after learning than when it is delayed. In an experiment, participants learned a list of words and were then tested for retention after 24 hours. One group of participants went immediately to bed for 8 hours after learning and then spent the remaining 16 hours of the retention interval going about their usual daily activities. The other group of participants stayed awake for 16 hours and then slept the last 8 hours of the retention interval. Word recall was better for the Immediate Sleep Group than for the Delayed Sleep Group. Following are the recall scores. Immediate Sleep Delayed Sleep 8. 7 4 1. Independent variable. 2. Dependent variable. 3. Is this a within or between subject design? Explain. 4. Experimental hypothesis. 5. Is this a directional or nondirectional hypothesis? Draw a curve and indicate the rejection region(s). 6. Null hypothesis. 7. Statistical hypotheses. 8. Compute the group means. Are the means in the predicted direction? 9. N= 10. Decision rule (.05). -41- 4, 9,
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Attached is the image of my homework. I was wondering how I know if it's directional or non directional hypothesis based on the problem. Additionally, I was wondering how to calculate df since this is t test for two independent samples.
thank you!
Transcribed Image Text:PROBLEM SET 1
t-test for Two Independent Samples
Important Terms-ation
Differences bru Samelc laHion
research design that vses a serarate grave of
means based on
all possible pairs of
random Samples
from tm
poPuLations
Between subject design > ratieanas for each treatment
condition
(one (onginon= sihmple exPeviment
Difference between sample means
Difference between population means
Pooled variance estimatesetima te of a foenanons
Estimated standard error of the difference between means
( many conditions comeiex
সলা
data from two a
move sampies
rariance
Obtained by
combin ingpoolin g
ハイe Sta
error
yên the vaCnan PoRvdtion hardor derimust be estimated
A team of sleep researchers believe that retention will be better when sleep comes immediately
ぐ oseo
after learning than when it is delayed. In an experiment, participants learned a list of words and
were then tested for retention after 24 hours. One group of participants went immediately to
bed for 8 hours after learning and then spent the remaining 16 hours of the retention interval
going about their usual daily activities. The other group of participants stayed awake for 16 hours
and then slept the last 8 hours of the retention interval. Word recall was better for the Immediate
Sleep Group than for the Delayed Sleep Group. Following are the recall scores.
Immediate Sleep
Delayed Sleep
8.
7
4
1. Independent variable.
2. Dependent variable.
3. Is this a within or between subject design? Explain.
4. Experimental hypothesis.
5. Is this a directional or nondirectional hypothesis? Draw a curve and indicate
the rejection region(s).
6. Null hypothesis.
7. Statistical hypotheses.
8. Compute the group means. Are the means in the predicted direction?
9. N=
10. Decision rule (.05).
-41-
4,
9,
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