Question
In: Statistics and Probability
: Dr. Smith was interested in examining if a new language training program would produce a...
: Dr. Smith was interested in examining if a new language training program would produce a change in the reading scores for the individuals in the population. In general population of college students, scores on a standardized reading test that are normally distributed with the mean µ = 65 and standard deviation σ = 15. Because it was not feasible to administer the training to everyone in the population, a sample of n = 64 individuals was selected, and the training program was given to this sample. Following the training, the average score for this sample was ?̅ = 69. Can the researcher conclude that the new program would have an effect on reading scores among college students? Round up to two decimal places. Use a two-tailed test and α = .01.
Q1: State your null hypothesis and research hypothesis in complete sentences.
Q2: what are the cut-off points?
Q3: What is the standard error?
Q4: What is the z-score?
Q5: Write your conclusion thoroughly.
Solutions
orchestra answered 1 year agoRelated Solutions
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Time 2
Time 3
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a.
State the null hypothesis.
b.
Identify the appropriate statistical test
c.
Calculate the appropriate test...
Dr. Smith is examining the development of moral reasoning in children. Seven children (11-years old) are...
Dr. Smith is examining the development of moral
reasoning in children. Seven children (11-years old) are assessed
three times over the year. The children are given moral reasoning
scenarios. Higher scores indicate higher levels of moral
reasoning.
Time 1
Time 2
Time 3
5
6
10
4
7
9
8
8
9
7
9
7
6
5
10
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Dr. Kovaleski is interested in examining whether quantity of sleep impacts problem solving ability. To test...
Dr. Kovaleski is interested in
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participants a puzzle and measured how long it took participants to
solve the puzzle in minutes. A group of participants were
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morning. Then the same participants were instructed to sleep 7
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Dr. Kovaleski is interested in examining whether quantity of sleep impacts problem solving ability. To test...
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examining the effects of a new teaching approach
on student learning of mathematics
concepts. The data below reflect the scores on a math
concept exam. The data represent the
number correct before the teaching approach was
used (Column A) and after the teaching
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Design A
Design B
Design C
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27
33
19
23
35
15
26
27
18
22...
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