Question

**A local university requires that all first year students
complete a math course during first semester. This year the
university is evaluating a new online version of the course. A
random sample of n = 20 students is selected and the students are
placed in the online course. At the end of the semester, all
students take the same math exam. The average score for the sample
of n = 20 students is M = 85. For the general population of
students who took the traditional lecture class, scores on the test
are normally distributed with a μ = 75 and σ = 15.**

**Can we conclude that scores on the math test for the
sample of students who took the new online course are significantly
different from those of the general population of students (who
took the traditional lecture course)? Use a two-tailed test with α
= .05. Be sure to state your null hypothesis, a decision about that
null hypothesis, and a conclusion explaining your results with an
APA format statement. Calculate Cohen’s d if
necessary.**

Answer #1

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A local university requires that all first-year students
complete a math course during first semester. This year the
university is evaluating a new online version of the course. A
random sample of n = 20 students is selected and the students are
placed in the online course. At the end of the semester, all
students take the same math exam. The average score for the sample
of n = 20 students is M = 85. For the general population of...

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not take the prep course is 32.1 The SAT...

A certain test preparation course is designed to improve
students' SAT Math scores. The students who took the prep course
have a mean SAT Math score of 507 while the students who did not
take the prep course have a mean SAT Math score of 501. Assume that
the population standard deviation of the SAT Math scores for
students who took the prep course is 45.7 and for students who did
not take the prep course is 32.1 The SAT...

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SAT Math scores are taken for a sample of 78 students who took the
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A certain test preparation course is designed to improve
students' SAT Math scores. The students who took the prep course
have a mean SAT Math score of 504 with a standard deviation of
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mean SAT Math score of 492 with a standard deviation of 43.5. The
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A researcher wants to
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1) State College is evaluating a new English composition course
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