Question

Suppose that you are told by your boss to analyze the effectiveness of a tutoring center on raising students’ grades in Calculus. The tutoring center runs reviews for each Calculus exam throughout the semester. For all students, you have access to SAT and ACT scores, whether or not they had high school Calculus, exams scores for each college Calculus exam, and the college Calculus course grade. Assume that each student either attended no sessions or attended all of them. You build a linear model for course grade converted to GPA.

Explain which variables you include and exclude, and why.

Answer #1

Thirteen students entered the business program at Sante Fe
College 2 years ago. The following table indicates what each
student scored on the high school SAT math exam and their
grade-point averages (GPAs) after students were in the Sante Fe
program for 2 years:
Student
A
B
C
D
E
F
G
Sat Score
421
377
585
690
608
390
415
GPA
2.90
2.93
3.00
3.45
3.66
2.88
2.15
Student
H
I
J
K
L
M
Sat Score
481
729...

Suppose your statistics instructor gave six examinations during
the semester. You received the following exam scores (percent
correct): 80, 74, 90, 93, 94, and 73. To compute your final course
grade, the instructor decided to randomly select two exam scores,
compute their mean, and use this score to determine your final
course grade.
Compute the population mean. This is your average grade based on
all of your grades. (Round your answer to 2 decimal
places.)
Compute the population standard deviation....

Suppose your statistics instructor gave six examinations during
the semester. You received the following exam scores (percent
correct): 83, 78, 87, 91, 95, and 71. To compute your final course
grade, the instructor decided to randomly select two exam scores,
compute their mean, and use this score to determine your final
course grade.
a. Compute the population mean. This is your average grade based
on all of your grades. (Round your answer to 2 decimal
places.)
b. Compute the population...

Suppose you are the Umoja Community Program Coordinator at West
College. You are interested in the effectiveness of "learning
communities" as it pertains to Umoja scholars and their overall
grade point average (GPA). Knowing that supplemental instruction
tends to be associated with higher academic success, you believe
that the more learning communities an Umoja student attends, the
higher their overall GPA will be. To test this, you count how many
weekly learning communities an Umoja student attends over the
duration...

QUESTION 1
Suppose a data set is skewed left. What is the most likely
relationship between the mean and the median?
a.
The mean is smaller than the median.
b.
The mean is larger than the median.
c.
The mean and median are not related to each other at all.
d.
The mean and median are essentially equal.
QUESTION 2
Which of the following CANNOT be obtained by a boxplot?
a.
mean
b.
IQR
c.
all of the above can...

What Statistical Test Should I Use
Please indicate the type of test needed to analyze the data
described.
Hints: Think about the IV and DV. How many levels of
the IV? Are they repeated measures? Are the data
categorical?
A. z-test
B. One-Sample t-Test
C. Dependent Measures t-Test
D. Independent Measures t-Test
E. One-way ANOVA
E. One-way ANOVA
F. Post-hoc tests
G. Between-Subjects Factorial ANOVA
H. Chi-Square test of Independence
________ 1. Compare spatial task scores after 0 or 3 drinks....

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