Statistics for the Behavioral Sciences
3rd Edition
ISBN: 9781506386256
Author: Gregory J. Privitera
Publisher: SAGE Publications, Inc
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Chapter 12, Problem 25CAP
1.
To determine
Complete the F table.
2.
To determine
Make the interpretations for Tukey’s HSD post hoc test.
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Researchers were interested in the effect of sleep on memory consolidation. Twenty-four participants were randomly assigned to either a “Sleep” or “No-Sleep” group, such that there were 12 participants in each group. On the first day, all participants were flashed pictures of 15 different objects on a computer screen and asked to remember as many objects as possible. That night, the “Sleep” group got an ordinary night’s sleep. The “No-Sleep” group was kept awake until the second night. All participants got an ordinary night’s sleep on the second and third nights. On the fourth day, all participants were tested to see how many of the original 15 objects they remembered. The data is below: Conduct an independent samples t-test, two-tailed, alpha = .05.
Sleep
NoSleep
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9
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Write the null hypothesis in symbols and word and write the alternative hypothesis in symbols and words
By hand, calculate…
iconic memory is a type of memory that holds visual information for about half a second (0.5 second). To demonstrate this type of memory, participants were shown three rows of four letters for 50 milliseconds. They were then asked to recall as many letters as possible, with a 0-, 0.5-, or 1.0-second delay before responding. Researchers hypothesized that longer delays would result in poorer recall. The number of letters correctly recalled is given in the table. Delav Before Recall 0 0.5 1
12 8 4
11 4 4
6 10 2
10 6 5
8 3 7
7 5 2(a) Complete the F table. (b) Compute Tukey's HSD post hoc test and interpret the results.
solve by hand step by step
iconic memory is a type of memory that holds visual information for about half a second (0.5 second). To demonstrate this type of memory, participants were shown three rows of four letters for 50 milliseconds. They were then asked to recall as many letters as possible, with a 0-, 0.5-, or 1.0-second delay before responding. Researchers hypothesized that longer delays would result in poorer recall. The number of letters correctly recalled is given in the table. Delav Before Recall 0 0.5 1
12 8 4
11 4 4
6 10 2
10 6 5
8 3 7
7 5 2(a) Complete the F table. (b) Compute Tukey's HSD post hoc test and interpret the results.
Chapter 12 Solutions
Statistics for the Behavioral Sciences
Ch. 12.2 - Prob. 1.1LCCh. 12.2 - Prob. 1.2LCCh. 12.2 - Prob. 1.3LCCh. 12.2 - Prob. 1.4LCCh. 12.4 - Prob. 2.1LCCh. 12.4 - Prob. 2.2LCCh. 12.4 - Prob. 2.3LCCh. 12.4 - Prob. 2.4LCCh. 12.6 - Prob. 3.1LCCh. 12.6 - Prob. 3.2LC
Ch. 12.6 - Prob. 3.3LCCh. 12.6 - Prob. 3.4LCCh. 12.6 - Prob. 3.5LCCh. 12.6 - Prob. 3.6LCCh. 12.7 - Prob. 4.1LCCh. 12.7 - Prob. 4.2LCCh. 12.7 - Prob. 4.3LCCh. 12.9 - Prob. 5.1LCCh. 12.9 - Prob. 5.2LCCh. 12 - Prob. 1FPCh. 12 - Prob. 2FPCh. 12 - Prob. 3FPCh. 12 - Prob. 4FPCh. 12 - Prob. 5FPCh. 12 - Prob. 6FPCh. 12 - Prob. 7FPCh. 12 - Prob. 8FPCh. 12 - Prob. 9FPCh. 12 - Prob. 10FPCh. 12 - Prob. 11FPCh. 12 - Prob. 12FPCh. 12 - Prob. 13CAPCh. 12 - Prob. 14CAPCh. 12 - Prob. 15CAPCh. 12 - Prob. 16CAPCh. 12 - Prob. 17CAPCh. 12 - Prob. 18CAPCh. 12 - Prob. 19CAPCh. 12 - Prob. 20CAPCh. 12 - Prob. 21CAPCh. 12 - Prob. 22CAPCh. 12 - Prob. 23CAPCh. 12 - Prob. 24CAPCh. 12 - Prob. 25CAPCh. 12 - Prob. 26CAPCh. 12 - Prob. 27CAPCh. 12 - Prob. 28CAPCh. 12 - Prob. 29PRCh. 12 - Prob. 30PRCh. 12 - Prob. 31PRCh. 12 - Prob. 32PRCh. 12 - Prob. 33PRCh. 12 - Prob. 34PR
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- 2. Iconic memory is a type of memory that holds visual information for about half a second (0.5 second). To demonstrate this type of memory, participants were shown three rows of four letters for 50 milliseconds. They were then asked to recall as many letters as possible, with a 0-, 0.5-, or 1.0-second delay before responding. Researchers hypothesized that longer delays would result in poorer recall. The number of letters correctly recalled is given in the table for this between-subjects designs. G=114 ΣΧ2 = 878 N=18 0 12 11 6 10 8 7 T = 54 M=9 SS=28 Delay Before Recall (in seconds) 0.5 8 4 10 6 3 5 T = 36 M = 6 SS = 34 1.0 4 b. Compute eta-squared to measure the effect size. WOH 4 2 5 7 2 T=24 M=4 SS = 18 a. Do the data indicate that delay to recall had a significant impact on number of words recalled? Use the hypothesis testing steps & alpha = .05. Compute any necessary post-hoc tests.arrow_forwardResearchers were interested in the effect of sleep on memory consolidation. Twenty-four participants were randomly assigned to either a “Sleep” or “No-Sleep” group, such that there were 12 participants in each group. On the first day, all participants were flashed pictures of 15 different objects on a computer screen and asked to remember as many objects as possible. That night, the “Sleep” group got an ordinary night’s sleep. The “No-Sleep” group was kept awake until the second night. All participants got an ordinary night’s sleep on the second and third nights. On the fourth day, all participants were tested to see how many of the original 15 objects they remembered. The data is below. Conduct an independent samples t-test, two-tailed, alpha = .05. Sleep NoSleep 14 8 13 9 8 6 9 13 11 7 10 9 9 10 13 12 12 8 11 11 14 9 13 12 Write the null hypothesis in symbols and words. Write the alternative hypothesis in symbols and words. By hand, calculate the…arrow_forwardAn experimenter wants to study the relationship between type of milk and infant growth in underdeveloped countries. She randomly assigns 300 infants to either a breast-feeding group or an infant formula group. She then weighs the infants every three days for the first four weeks of life.arrow_forward
- Diana tested the effect of number of items on short-term memory in dolphins. She randomly presented visual arrays with 1, 2, 3, 5, 8, 13, 21 items for five minutes. She asked 3 dolphins to remember the items. She then presented a new array with old and new items. The dolphins responded by touching the items with their tails. She hypothesized that Dolphins could remember 3 items accurately, but not more than that. What is/are the dfs of the best inferential test to use in order to answer Diana's research question? 2 6, 14 1 6 6, 12arrow_forwardA study was designed to determine whether video game players are better than non-video game players at crossing the street when presented with distractions. Participants (college students) entered a street-crossing simulator. The simulator was designed to have cars traveling at various high rates of speed in both directions. During the crossing, the students also performed a memory task as a distraction. The researchers found that students who are video game players took an average of 5.6 seconds to cross the street, with a standard deviation of 0.6 seconds. Assume that the time, x, to cross the street for the population of video game players has μ = 5.6 and o=0.6. Now consider a sample of 40 students and let x represent the sample mean time (in seconds) to cross the street in the simulator. Complete parts a and b below. a. Find P(x>5.8). P(x>5.8) = (Round to three decimal places as needed.)arrow_forwardIf 30 participants each completed a memory task three times — once each after having no, moderate, or high levels of caffeine, calculate the total degrees of freedom.arrow_forward
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- In Exercises 33 to 36, determine whether or not the conditions for using two-sample t procedures are met. 33. Shoes How many pairs of shoes do teenagers have? To find out, a group of AP® Statistics students conducted a survey. They selected a random sample of 20 female students and a separate random sample Females 333 95 4332 66 410 8 9 100 7 0 0 4455 WW~~ 1 1 2 2 2 Males 4 3 555677778 0000124 3 58 Key: 22 represents a male student with 22 pairs of shoes.arrow_forwardQuestion 1A researcher is interested in measuring the memory recall of students. Twenty students were given fifteen minutes to try to memorize a list of 15 phrases. Each student was then asked to list as many of the phrases as he or she could remember both two hours and twenty-four hours later. The number of phrases recalled correctly for each student are shown below. Student 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Two hours 7 1 9 13 3 0 3 14 0 12 2 2 12 10 2 4 3 11 5 4 Twenty-four Hours 2 2 4 14 10 9 4 3 1 3 14 4 1 0 11 10 10 12 14 13 c. Determine whether there is evidence, at the 5% level of significance, that for all students, the mean number of words recalled after two hours exceeds that recalled after twenty-four hours. d. Confirm test results in part (c) using JASP. Note: All JASP input files and output tables should be providedarrow_forwardIn an experiment examining human memory, two groups of participants are used. One group is allowed 5 minutes to study a list of 40 words and the second group is given 10 minutes of study time for the same list of words. Then, both groups are given a memory test, and the researcher records the number of words correctly recalled by each participant. For this experiment, identify the independent variable and the dependent variable.arrow_forward
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