1.) Suppose that a teacher wants to see if a new teaching method improves test scores in their class. Luckily, they also know that the average score of all students in the United States in that grade is 85 and the sd is 10. Given that their class of 25 students’ (the sample) Mean score is 90... What is the standard error? 1 2 1.5 2.5
1.) Suppose that a teacher wants to see if a new teaching method improves test scores in their class. Luckily, they also know that the average score of all students in the United States in that grade is 85 and the sd is 10. Given that their class of 25 students’ (the sample)
What is the standard error?
1
2
1.5
2.5
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2.) Calculate the standardized effect size for question 1. What can you say about this effect size?
It is a small effect size
It is a moderate effect size
It is a large effect size
Cannot calculate the standardized effect size with the information given.
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3.) Students have taken an exam. The mean was 70 and the standard deviation was 2. A student who scored 72, scored better than:
84%
30%
20%
99%
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4.) The following is the 5-number summary for a variable. Calculate the
(
5
20
10
2
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5.) The number of Twitter followers of eight people are: 108, 57, 6, 18, 22, 93, 252, 121. What is the
65
93
75
57
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6.) What are the Mean and
In the following dataset: 2, 2, 7, 8, 2, 1, 1, 10
What are the Mean and Mode?
Mean = 4.13, Mode = 1
Mean = 4.13, Mode = 2
Mean = 6.7, Mode = 1
Mean = 6.7, Mode = 2
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7.) A researcher sent out a survey to 100 participants asking the question: "How often do you use social media?" in a scale from 0 (Never) to 100 (All the time). After running some
What is the range of the data?
100
95
85
15
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8.) What is the variance for question number 7 ?
What is the variance?
840
225
30
85
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