1) Which of the following are conditions or assumptions necessary to perform an independent samples t-test?...
1) Which of the following are conditions or assumptions necessary to perform an independent samples t-test? [Select all that apply]
A) Positive predictive value of the test
B) Approximately Normal Distribution of both Samples
C) Range < 2.5 standard deviations
D) A large number of samples (probably at least 30, preferably more)
E) The outcome variable is dichotomous
F) There are exactly two groups
G) A null and alternate hypothesis
H) No substantial outliers
Homework Answers
The conditions and assumptions for independent t test
Approximately Normal Distribution of both Samples.
There are exactly two groups.
No substantial outliers
Above are the conditions necessary for independent t test.
Add Answer to:
1) Which of the following are conditions or assumptions
necessary to perform an independent samples t-test?...
Suppose you are planning to use a t test for independent groups to tast the following one-tailed ...
Suppose you are planning to use a t test for independent groups to tast the following one-tailed hypotheses you want to maximize the power of your study, you are considering which factors might increase power so th can adjust your plans to incorporate them, if possible, before conducting your research you The following are your considerations for increasingp ower. Fill in any missing words/values. (Hint: Remember that for this alternative hypothesis, you will reject the null hypothesis for large values...
rowan.instructure.com Question 3 0.5 pts Which of the following are assumptions of the independent samples t-test?...
rowan.instructure.com Question 3 0.5 pts Which of the following are assumptions of the independent samples t-test? Skewed population Sample size over 30 Homogeneity of variance Related samples Question 4 0.5 pts What is the term called in an independent samples t-test that averages together the variances of the two samples? Mean variance Average variance Standard error of the difference Pooled variance Question 5 0.5 pts How is the standard error of the difference (used in independent samples t-tests) different from...
QUESTION 11 You run an independent samples t-test between two groups, and find a t-statistic of...
QUESTION 11 You run an independent samples t-test between two groups, and find a t-statistic of t=1.67. Is this sufficient to reject the null hypothesis? Assume α=0.05 and a one-sided test. Yes, > 1.67 is sufficient to reject the null. No, > 1.67 is not sufficient to reject the null. Not enough information. 2 points QUESTION 12 In a dependent samples t-test, the sample sizes must be equal. True False 2 points QUESTION 13 In an independent samples...
1. When do we use an independent groups t-test? a. b. c. d. When we are...
1. When do we use an independent groups t-test? a. b. c. d. When we are comparing means from one sample that has been measured twice. When we are comparing means from two different samples. When we are comparing a sample mean to a population mean. When we are comparing two population means. 2. Which of the following is true regarding the use of t-tests for true experiments versus quasi-experimental designs? a. b. We use the same t-test whether it...
The null hypothesis in an independent-samples t-test would be stated as which of the following: (A)...
The null hypothesis in an independent-samples t-test would be stated as which of the following: (A) The mean of the sample is equal to the mean of the population. (B) The mean of sample 1 is equal to the mean of sample 2. (C) The mean of sample 1 is not equal to the mean of sample 2. (D) The mean of the sample is not equal to the mean of the population
PLEASE help ?? A researcher conducted a single sample t-test on results of an experiment with...
PLEASE help ??
A researcher conducted a single sample t-test on results of an experiment with n = 18 participants and the computed t = -2.28. What is the correct conclusion from this experiment if p < 0.05, 2-tails test is used for hypothesis testing? O A. The researcher failed to reject the null hypothesis and concluded that there is a significant treatment effect. O B. The researcher rejected the null hypothesis and concluded that there is a significant treatment...
Lab Worksheet: independent samples t-test . Identify the proper variables and hypotheses for the following research...
Lab Worksheet: independent samples t-test . Identify the proper variables and hypotheses for the following research question: Is there a difference in the number of digits recalled between auditory and visual presentation of the digit span task? 2 point:s a. What is the IV and its corresponding levels conditions? i. Condition: 1. Auditory 2. Visual b. What is the DV as operationally defined (measured)? i. Digits Recalled ii. Time To Complete State the null hypothesis: Ho: A d. State the...
10. In an independent-samples t test, the ________ is used rather than the ________. Select one:...
10. In an independent-samples t test, the ________ is used rather than the ________. Select one: A. standard deviation; pooled variance B. variance; pooled variance C. pooled variance; standard deviation D. standard deviation; variance 11. Dr. Jameson wanted to know if IQ scores differed between male and female participants in his study. He gave 28 participants an IQ test and then compared IQ scores for gender differences. He hypothesized that there would be a statistically significant gender difference in IQ...
An independent-samples t test and getting ready for a date: In an example we sometimes use...
An independent-samples t test and getting ready for a date: In an example we sometimes use in our statistics classes, several semesters’ worth of male and female students were asked how long, in minutes, they spend getting ready for a date. The data reported below reflect the actual means and the approximate standard deviations for the actual data from 142 students. Men: 28, 35, 52, 14 Women: 30, 82, 53, 61 Conduct all six steps of an independent-samples t test....
An Independent Samples T Test is used to make an inference about whether two groups in...
An Independent Samples T Test is used to make an inference about whether two groups in the population have different averages on some quantitative measure or dependent variable. This test could be used to compare the average annual earnings of High School graduates, compared to Community College graduates For this potential research question, answer the following questions. Please use only numeric values in your answers to questions 1, 2 and 3 and a word to answer question 4 1) According...
Suppose you are planning to use a t test for independent groups to tast the following one-tailed hypotheses you want to maximize the power of your study, you are considering which factors might increase power so th can adjust your plans to incorporate them, if possible, before conducting your research you The following are your considerations for increasingp ower. Fill in any missing words/values. (Hint: Remember that for this alternative hypothesis, you will reject the null hypothesis for large values...
rowan.instructure.com Question 3 0.5 pts Which of the following are assumptions of the independent samples t-test? Skewed population Sample size over 30 Homogeneity of variance Related samples Question 4 0.5 pts What is the term called in an independent samples t-test that averages together the variances of the two samples? Mean variance Average variance Standard error of the difference Pooled variance Question 5 0.5 pts How is the standard error of the difference (used in independent samples t-tests) different from...
1. When do we use an independent groups t-test? a. b. c. d. When we are comparing means from one sample that has been measured twice. When we are comparing means from two different samples. When we are comparing a sample mean to a population mean. When we are comparing two population means. 2. Which of the following is true regarding the use of t-tests for true experiments versus quasi-experimental designs? a. b. We use the same t-test whether it...
PLEASE help ??
A researcher conducted a single sample t-test on results of an experiment with n = 18 participants and the computed t = -2.28. What is the correct conclusion from this experiment if p < 0.05, 2-tails test is used for hypothesis testing? O A. The researcher failed to reject the null hypothesis and concluded that there is a significant treatment effect. O B. The researcher rejected the null hypothesis and concluded that there is a significant treatment...
Lab Worksheet: independent samples t-test . Identify the proper variables and hypotheses for the following research question: Is there a difference in the number of digits recalled between auditory and visual presentation of the digit span task? 2 point:s a. What is the IV and its corresponding levels conditions? i. Condition: 1. Auditory 2. Visual b. What is the DV as operationally defined (measured)? i. Digits Recalled ii. Time To Complete State the null hypothesis: Ho: A d. State the...
An Independent Samples T Test is used to make an inference about whether two groups in the population have different averages on some quantitative measure or dependent variable. This test could be used to compare the average annual earnings of High School graduates, compared to Community College graduates For this potential research question, answer the following questions. Please use only numeric values in your answers to questions 1, 2 and 3 and a word to answer question 4 1) According...
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