A sample of 10 participants was given a memory improvement class and this sample was compared...
Homework Answers
Answer: Option ( 2) , Single sample t-test
Answer: Single sample t-test
because sample size is small ( less than 30 )
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sample of 10 participants was given a memory improvement class and
this sample was compared...
In a study of the effects of cognitive training on memory, 60 participants are recruited, run...
In a study of the effects of cognitive training on memory, 60 participants are recruited, run in a session where they are given a 10-page Wedding story to remember, and then tested. The participants are randomly assigned to one of three conditions: a) 20 subjects participate in a Memory Improvement Training program during the session, b) 20 subjects are given exercises that do not improve memory (i.e., focusing on a white board), but are told that the exercises are meant...
A sample of 10 students record their scores on the final exam for their statistics class....
A sample of 10 students record their scores on the final exam for their statistics class. The mean of the sample is 81 with sample standard deviation 7 points. Analysis of the 10 sample values indicated that the population is approximately normal. We wish to find the 95% confidence interval for the population mean test scores. What is the confidence level, c? Which of the following is correct? To find the confidence interval, a z-critical value should be used because...
2. Hypothesis Test Scenario 1 If you are provided the population standard deviation (sigma) and are...
2. Hypothesis Test Scenario 1 If you are provided the population standard deviation (sigma) and are testing the potential effect of a treatment on that population using sample data, then which of the following hypothesis tests should you use? z-test (chapter 8) single sample t-test (chapter 9) independent samples t-test (chapter 10) repeated measures t-test (chapter 11)
A professor compared differences in class grades between students in their freshman, sophomore, junior, and senior...
A professor compared differences in class grades between students in their freshman, sophomore, junior, and senior years of college. If different participants were in each group, then what type of statistical design is appropriate for this study? a two-independent-sample t test a one-way between-subjects ANOVA a two-way between-subjects ANOVA both A and B
only need 2-sample t-test for equal variance filled out 1. Create a table using the provided...
only need 2-sample t-test for equal variance filled
out
1. Create a table using the provided headings for the following tests. The comparison is what is being statistical tested. The other assumptions column should be any additional information needed to distinguish when that test is used as compared to the other tests in the table. (5 pts) Tests to include: 2-sample t-test for equal variance, 2-sample t-test for unequal variance, Mann-Whitney U-test, Z-test, Paired t-test, Wilcoxon Signed Rank Test, 1-Sample...
A researcher wants to examine the effects of color on memory. The researchers shows a group...
A researcher wants to examine the effects of color on memory. The researchers shows a group of n = 10, a list of words on blue paper, and another group of n = 15 on yellow paper? The participants are then given a memory test to see how many words they remember. The blue group remembered M = 22 words with a SS= 740 and the yellow group remembered a mean or M=25 words with a SS=820. What test is...
in comparing the engagement levels of first-year statistics students. In a previous nation-wide study, engagement levels...
in comparing the engagement levels of first-year statistics students. In a previous nation-wide study, engagement levels were found to be normally distributed, with µ=60.00, σ=10.00. The lecturer collects a convenience sample of 50 first-year students and finds that her students have a mean engagement level equal to 75.54. What statistical procedure should be used, to test whether there is a significant mean difference in engagement levels between the lecturer’s first year students and the population average? a. One sample Z-test....
1.Given an interval or ratio scale dependent variable and a nominal independent variable with three or...
1.Given an interval or ratio scale dependent variable and a nominal independent variable with three or more levels, we could use a(n) ________ to analyze the data. Select one: A. t test B. ANOVA C. z test D. PRE test 2. Interested in the effects of different kinds of instruction on videogame performance, Martin asks 30 college freshmen to each play an hour of Ratchet and Klank. Participants are randomly assigned to one of three instruction groups: (1) complete the...
6. Engagement Activity: The t Test for Two Related Samples
6. Engagement Activity: The t Test for Two Related Samples In the last chapter, you were introduced to Professor Ken Bonanno's Statistical Methods in Psychology class, where students are asked to complete a research study as a part of the semester-long course. Many of his students' research questions could be asked using the independent-measures t test, but there are other approaches, which will be explored in this chapter. Click the following topics to see some sample questions asked by Professor Bonanno's students....
A gerontologist wanted to study ethnicity and life expectancy. He compared 12 African-Americans to 12 Hispanic-Americans...
A gerontologist wanted to study ethnicity and life expectancy. He compared 12 African-Americans to 12 Hispanic-Americans ages according to their death records. Each person was paired by date of birth. How would we find see if there is a difference in life expectancy? What is the statistical test that should be used? Z test One Sample T test Independent T test Dependent T test
only need 2-sample t-test for equal variance filled
out
1. Create a table using the provided headings for the following tests. The comparison is what is being statistical tested. The other assumptions column should be any additional information needed to distinguish when that test is used as compared to the other tests in the table. (5 pts) Tests to include: 2-sample t-test for equal variance, 2-sample t-test for unequal variance, Mann-Whitney U-test, Z-test, Paired t-test, Wilcoxon Signed Rank Test, 1-Sample...
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QUESTION 8
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