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For each question, provide SPSS output for the selected test and (where specified) write up the results in APA format as you would for a journal article. 1. A group of 30 participants is divided in half based on their self-rating of the vividness of their visual imagery. Each participant is tested on how many colors of objects he or she can correctly recall from a briefly seen display. The results of this experiment are below. (Note: You will need one column in SPSS for the IV with two levels [vivid/less vivid] and one for the DV.) Vivid Less Vivid 18 14 17 12 16 13 15 10 14 8 13 8 9 7 8 6 7 5 6 4 5 3 11 2 13 5 18 11 18 14 Enter the data into SPSS and perform an independent samples t-test of the null hypothesis that vividness of visual imagery does not affect the recall of colors; use alpha = .01 (or 99% confidence), two-tailed. (Hint: The default alpha level is not .01; see options in the test menu.) What is your statistical conclusion? a. SPSS output: b. Results write-up: c. What are some of the limitations that prevent you from concluding that the visual imagery causes improved color recall in this type of experiment? 2. An educator has invented a new way to teach geometry to high school students. To test this new teaching method, the educator matches 16 tenth-graders into 8 pairs based on their grades in previous math courses. Then the students in each pair are randomly assigned to either the new method or the traditional method. At the end of a full semester of geometry training, all students take same standard high school geometry test. The scores for each student in this hypothetical experiment are as follows: Traditional New 65 67 73 79 70 83 85 80 93 99 88 95 72 80 69 100 Perform a paired-samples t-test for this experiment (p = .01 or 99% confidence, two-tailed). Is there a significant difference between the two teaching methods? a. SPSS output: b. Results write-up: c. Find the 99% confidence interval for the population difference of the two teaching methods. Explain how these confidence intervals confirm the results of the t-test conducted in SPSS.
Estimate the proportion of made 6-foot putts by professional golfers. Estimate the proportion of made 6-foot putts by amateur golfers. Which group had a better putting accuracy?
Jamie expects that a bulb will last for 400 to 500 days, what is the probability of an Acme bulb satisfying that?
Explain what property associated with the Central Limit Theorem you consider the most important contribution, enabling the use of the normal distribution for sample means.
Find a 95% confidence interval for the true proportion of patients who experienced cotton mouth. Show your calculations and/or explain the process used to obtain the interval.
Based on the sample findings, estimate the true mean of Saturday sales with 90% probability.
If a random sample of 500 third year students is taken at a city university, what is an estimate of the probability that 20 percent or less had switched majors within their first two years?
construct a frequency distribution table for these data. what type of graph would be appropriate to show the frequency distribution for these data?
What is the probability of correctly guess the right code on the first try? What is the probability of not correctly guessing the right code o the first try?
Give examples of how quadratic equations can be used to solve everyday problems.
A recent study of the USA births showed the average birth weight of a male was 8 lbs.; the average weight of a female newborn was 7.4 lbs.
Show the complete ANOVA table for this test including the test statistic. The null hypothesis is to be tested at 95% confidence. Determine the critical value for this test. What do you conclude?
The Skateworld Company operates ice rinks in several major cities throughout the United States. During each session of open skating, one customer is selected at random to receive a free pass for a future open skating session.
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