Math notes

Question 1
1 / 1 pts
Another word for ‘average’ is ‘mean’.
True
YES!
False

Question 2
1 / 1 pts
A line that goes from the lower left of a graph to the upper right has a positive slope.
positive slope.png
True
Great!
False

Question 3
1 / 1 pts
The shape of the distribution called the normal distribution is
positively skewed.
a pie chart.
a regression line.
bell-shaped.

UnansweredQuestion 4
0 / 1 pts
Given the following equation for a line: Y = 2X + 4
If X = -4, Y =

UnansweredQuestion 5
0 / 1 pts
Given the following equation for a line: Y = 3X + 4
If Y = -2, X =

IncorrectQuestion 6
0 / 1 pts
3/4 + 2/3 – 1/5
not enough information to answer
> 1
= 1
< 1

Question 7
1 / 1 pts
In a group of 80 psychology majors, 60% are female. How many female psychology majors are in this group?
48%
48
60%
60

IncorrectQuestion 8
0 / 1 pts
Σ(X2) = (∑X)2
True
Maybe you don't recognize that Greek Symbol, . It is the summation symbol.
False

IncorrectQuestion 9
0 / 1 pts
If X = 2 and Y = -5, then XY =
3
.
If X = 2 and Y = -5, then √(-5Y) =
. (√ is the symbol for square root.)
If X = 2 and Y = -5, then 2X2 – 3Y3 =
.
Answer 1:
3
Answer 2:
(You left this blank)
Answer 3:
(You left this blank)

UnansweredQuestion 10
0 / 1 pts
Compute Sophia’s GPA from her fall semester course grades, provided below, with number of credits.
Grade points are: A: 4, B+: 3.5, B: 3, C+: 2.5, C: 2, D: 1, F: 0
Provide only the answer, rounded to 2 decimal places.
American History since 1950: A (3 credits)
Algebra II: B+ (4 credits)
Principles of Sociology: A (3 credits)
Biostatistics: C+ (4 credits

UnansweredQuestion 11
0 / 1 pts
Samira is nearing the end of her biology course and she’s wondering what her current average is, going into the final. Using information from her syllabus she sees the following.
Tests: 50% of course grade
Lab write-ups: 30% of course grade
Pre-labs: 15% of course grade
Attendance at Zoom Lectures: 5%
Samira’s grades are as follows:
Test 1 = 90%
Test 2 = 85%
Test 3 = 78%
Lab 1: 99%
Lab 2: 100%
Lab 3: 85%
Lab 4: 100%
Lab 5: 93%
Her Pre-lab average is 90%.
Her Attendance grade is 100%.
Compute her current grade based on this information:
Provide only your answer, rounded to 2 decimal places.

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