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 1
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
3
5
7
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a. State the null hypothesis.
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You are interested in developing a software program targeted at
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Population 1 (1):
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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
examining whether quantity of sleep impacts problem solving
ability. To test problem solving ability, the research team gave
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
hours and then solve a different puzzle in the morning. Then,
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Dr. Kovaleski is interested in examining whether quantity of sleep impacts problem solving ability. To test...
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You (Dr. Gore) are a researcher examining the effects of a new teaching approach on student...
You (Dr. Gore) are a researcher
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
approach was used (Column B) for the same
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A researcher is interested in determining whether the new design
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Design A
Design B
Design C
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