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Statistics
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Apr 3, 2024
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Formulas you may need Independent Samples #-test: Related Samples r-test: $%p = (SS; + SS,) / (df; + df,) Sp=Sp/V7 PO Smuma™ V §°p/ny +5%p/n; 5 o Bi=%D dfzn-1 Sma-m2 df=(ny-1) +(n;— 1) EXPERIMENT 1: Forty participants were given a list of 20 object words to process. The 40 participants were randomly assigned to one of two treatment conditions. Half were instructed to respond “yes” if each object word had more than one vowel in it (shallow processing), and “no” if it did not. The other half were instructed to respond “yes” if the object is normally found in a bathroom (deep processing), and no if it usually is not. After a five-minute distractor task, all subjects were given a surprise free recall task. The number of words correctly recalled was recorded for each subject. B Vowel group: M =12.1, SS = 32.5, n=20 B Bathroom group: M = 14.9, SS = 26.5, n=20 B We will use a=.05 Question 1: What are the null and alternative hypotheses, respectively? Write out using appropriate statistical notation. Null hypothesis Ho: ul = u2 Alternative hypothesis Ha: ul /= u2 Question 2: What are the degrees of freedom for this experiment? Df=38 Question 3: Given the df above, what is the critical value. (Use the table at the end of your book.) Critical value=2.02 Question 4: What is the pooled variance (s’p)?? $A2p=1.55 Question 5: What is the standard error for the t statistic? Standard error=.394 Question 6: What is the value of the t-statistic? t-stat value =-7.11 Question 7: Should the null hypothesis be accepted or rejected? rejected Question 8: b) Determining object purpose results in better recall than counting vowels. EXPERIMENT 2: Boeing believed that redesigning the cockpits of their F-18 aircraft could reduce controlled flight into terrain (CFIT) accidents. To determine if this was the case, they used two different flight simulators that were identical with the
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A sample of n = 9 scores has EX = 108. What is the sample mean?
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What is r (5)?
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Question with last attempt is displayed for your review only
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multiple choice
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Data:
TSERofReturn
AcmeRofReturn
1
0.42478
-0.48194
2
1.61213
-0.73284
3
-0.98754
-2.28445
4
-0.30013
-1.55312
5
1.41215
0.68674
6
0.68725
-1.31132
7
0.03733
-0.83295
8
-1.72494
-1.71975
9
0.33729
1.14443
10
-1.07502
-1.79885
11
0.86222
0.89736
12
1.17468
1.66664
13
-0.38761
-0.02658
14
1.66212
0.9086
15
1.09969
1.99935
16
-0.06266
0.46148
17
-1.96241
-1.41004
18
-1.32499
-0.38086
19
-1.51247
-1.90904
20
0.74974
0.91873
21
-0.38761
-0.49714
22
-0.17514
-1.31385
23
-3.41222
-1.15681
24
-0.01266
2.11718
25
0.16231
1.78766
26
-0.82506
1.30344
27
-0.41261
-0.43377
28
0.2623
-1.70274
29
-1.16251
0.4692
30
-1.05003
0.27671
31
-0.65008
-0.63741
32
0.62475
2.9895
33
-0.68758
1.3613
34…
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A sample of n = 5 scores has a mean of M = 9. What is EX for this sample?
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Related Questions
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Recommended textbooks for you
- Algebra & Trigonometry with Analytic GeometryAlgebraISBN:9781133382119Author:SwokowskiPublisher:CengageGlencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill
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