5. Determine the value needed to reject the null hypothesis. Remember to calculate thecorrect degrees of freedom before finding the critical t-value! Note whether it is best touse the one-tailed or two-tailed test.6. Compare the obtained and critical value7.Decide whether you will retain the null hypothesis or ...Decide whether you will reject the null hypothesis8.Finally, write up your results as you would see it in a results section of an empirical9.groupresearchMake sure to include the means and SDs for smashed into and hitрaper.(in miles). I do NOT need to see the effect size (Cohen's D)10. Was your obtained t-value positive or negative? Would it matter either way? With yourdiscussiontell my why a positive or negative value is not important when it comesgroup,obtained valueto your11. What is more appropriate to use for your data set: the one-tailed t-Test or the two-tailed t-Test. Why?12. Why would it be easier to find significance using a p value of .05 than a p value of .01?MODEDEL SY 3211 - Research Methods and Design I - Group Assignment #11 - How Fast?Instructions: In 1974, Loftus and Palmer conducted a classic study demonstrating how thelanguage used to ask a question can influence eyewitness memory. In the study, college studentswatched a film of an automobile accident and then were asked questions about what they saw.One group was asked, "About how fast were the cars going when they smashed into each other?"Another group was asked the same question except the verb was changed to "hit" instead ofsmashed into." The "smashed into" group reported significantly higher estimates of speed thanthe "hit group. You, as a researcher wonder if Loftus and Palmer's study is reliable, andthis study with a sample of FIU students and obtains the following data.repeatsHit GroupSmashed Into Group28462241365132363841393733463137353252255522502741223925473245263236413546393740Your job is to determine if smashed into group reports higher speed than hit group. As you workon this problem, make sure to provide information for each of the eight steps we cover inChapter 11 (Salkind) as well as the APA write-up you would see in a results section.1l and alternative hypotheses

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Asked Nov 13, 2019
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5. Determine the value needed to reject the null hypothesis. Remember to calculate the
correct degrees of freedom before finding the critical t-value! Note whether it is best to
use the one-tailed or two-tailed test.
6. Compare the obtained and critical value
7.
Decide whether you will retain the null hypothesis or ...
Decide whether you will reject the null hypothesis
8.
Finally, write up your results as you would see it in a results section of an empirical
9.
group
research
Make sure to include the means and SDs for smashed into and hit
рaper.
(in miles). I do NOT need to see the effect size (Cohen's D)
10. Was your obtained t-value positive or negative? Would it matter either way? With your
discussion
tell my why a positive or negative value is not important when it comes
group,
obtained value
to your
11. What is more appropriate to use for your data set: the one-tailed t-Test or the two-tailed t-
Test. Why?
12. Why would it be easier to find significance using a p value of .05 than a p value of .01?
MODE
DEL
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Image Transcriptionclose

5. Determine the value needed to reject the null hypothesis. Remember to calculate the correct degrees of freedom before finding the critical t-value! Note whether it is best to use the one-tailed or two-tailed test. 6. Compare the obtained and critical value 7. Decide whether you will retain the null hypothesis or ... Decide whether you will reject the null hypothesis 8. Finally, write up your results as you would see it in a results section of an empirical 9. group research Make sure to include the means and SDs for smashed into and hit рaper. (in miles). I do NOT need to see the effect size (Cohen's D) 10. Was your obtained t-value positive or negative? Would it matter either way? With your discussion tell my why a positive or negative value is not important when it comes group, obtained value to your 11. What is more appropriate to use for your data set: the one-tailed t-Test or the two-tailed t- Test. Why? 12. Why would it be easier to find significance using a p value of .05 than a p value of .01? MODE DEL

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SY 3211 - Research Methods and Design I - Group Assignment #11 - How Fast?
Instructions: In 1974, Loftus and Palmer conducted a classic study demonstrating how the
language used to ask a question can influence eyewitness memory. In the study, college students
watched a film of an automobile accident and then were asked questions about what they saw.
One group was asked, "About how fast were the cars going when they smashed into each other?"
Another group was asked the same question except the verb was changed to "hit" instead of
smashed into." The "smashed into" group reported significantly higher estimates of speed than
the "hit group. You, as a researcher wonder if Loftus and Palmer's study is reliable, and
this study with a sample of FIU students and obtains the following data.
repeats
Hit Group
Smashed Into Group
28
46
22
41
36
51
32
36
38
41
39
37
33
46
31
37
35
32
52
25
55
22
50
27
41
22
39
25
47
32
45
26
32
36
41
35
46
39
37
40
Your job is to determine if smashed into group reports higher speed than hit group. As you work
on this problem, make sure to provide information for each of the eight steps we cover in
Chapter 11 (Salkind) as well as the APA write-up you would see in a results section.
1l and alternative hypotheses
help_outline

Image Transcriptionclose

SY 3211 - Research Methods and Design I - Group Assignment #11 - How Fast? Instructions: In 1974, Loftus and Palmer conducted a classic study demonstrating how the language used to ask a question can influence eyewitness memory. In the study, college students watched a film of an automobile accident and then were asked questions about what they saw. One group was asked, "About how fast were the cars going when they smashed into each other?" Another group was asked the same question except the verb was changed to "hit" instead of smashed into." The "smashed into" group reported significantly higher estimates of speed than the "hit group. You, as a researcher wonder if Loftus and Palmer's study is reliable, and this study with a sample of FIU students and obtains the following data. repeats Hit Group Smashed Into Group 28 46 22 41 36 51 32 36 38 41 39 37 33 46 31 37 35 32 52 25 55 22 50 27 41 22 39 25 47 32 45 26 32 36 41 35 46 39 37 40 Your job is to determine if smashed into group reports higher speed than hit group. As you work on this problem, make sure to provide information for each of the eight steps we cover in Chapter 11 (Salkind) as well as the APA write-up you would see in a results section. 1l and alternative hypotheses

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Step 1

Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If you want remaining sub-parts to be solved, then please resubmit the whole question and specify those sub-parts you want us to solve.

From the provided information, the hypothesis can be constructed as;
Null hypothesis; there is no significance difference between estimation of speed, H0:µ1= µ2

Alternative hypothesis; the “smashed into” group report higher estimates of speed than the “hit” group.

H0:µ1< µ2

Here µ1 and µ2 are the population mean of hit group and smashed into group respectively.

The sample size of hit group (n1) = 20

Consider x1 be a random variable which represents the hit speed.

The mean and standard deviation for hit group can be obtained as:

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Sum of all values mean ( Total values 28+ 22 40 20 31.3 Σ- Standard deviation ( s,) = п —1 (28-31.3)+(40-31.3) 20 1 S = 6.199

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Step 2

Similarly, the sample size of hit group (n2) = 20

Consider x2 be a random variable which represents the smashed into speed.

The mean and standard deviation for smashed into group can be obtained as:

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Sum of all values mean (x, Total values 46+41 37 20 , 42.45 Σ- Standard deviation ( s, -1 (46-42.45)+(37-42.45) 20 1 s, 6.732

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Step 3

5)   The value of the test st...

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п п, 31.3 42.45 (6.199) (6.732) 20 20 =-5.45 =I_5.45| 1 =5.45

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