Suppose the instructor of a class was interested in examining whether time of day influenced test taking. For group A, quizzes always occurred at 1 PM. For group B, quizzes always occurred at 9 PM. To choose the groups, the instructor flipped a coin for each student- if "heads", then the student would be part of group A and if "tails", the student would be part of group B. At the end of the semester, the instructor found that students in group A received a median grade of C+ whereas students in group B received a median grade of B+. a. What kind of data structure is this: descriptive, correlational, group comparison - experimental, or group comparison-non-experimental? b. What is the most likely scale of measurement for each variable? c. Can the researcher infer causality?

Q: メ+1

A:

Q: 3.3 31 3 O 3 O 3평 37

A:

Q: Simplify (22/3.2*/3)

A: We have to simplify the given expression.

Q: A = 6 -2 -2 10 -3 5 1 ---3-0 C=0-2 a = 1, b = [3 08]. -10 1 . B 5 2 11 9 4 4 7 0 0 11

A: We have to solve given Questions.

Q: 2. 3. 8. 5.

A:

Q: 2. V686

A:

Q: A-1 does not exist.

A:

Q: 31/2 / 1/2

A:

Q: expand (a-b)7

A: The solution is given in the next step.

Q: Suppose that 103 Σ ai = 19 and i=1 103 i=1 b₁ = 18. Compute the sum.

A:

Q: 7,20

A:

Q: 619 d. 4 10

A:

Q: 10 8. ID 116

A: Introduction: The division is one of the four basic mathematical operations, alongside addition,…

Q: 6.3 3

A:

Q: 198-33

A: Given: 198-33

Q: 1805

A:

Q: 2. 14 11

A: To find x.

Q: 3. What is the type of the function y-(3x+5)(2x+1)? ODecreasing Static Exponential Logarithmic…

A: The given function is y=3x+52x+1. What is the type of the given function.

Q: 44° H. 30

A: It is problem of secant line at circle.

Q: 3. Graphically Subtract (-1+i) from (3+2i)

A: If we have to subtract a vector b from another vector a, graphically, then we actually are adding…

Q: 7

A:

Q: 57-24

A: Given that: 57-24

Q: 2) Expand the following a) Csa2-2b)

A: I have to exapand (5a^2-2b)

Q: 11 35

A:

Q: Identify the postulate for each drawing

A: Identify the postulates for each drawing

Q: 6. 8.

A: Pythagorean Theorem:                  Pythagoras theorem states that  "In right angled triangle ,…

Q: In the following diagram below, what is the slope of line AB? 3.

A: Ans:   1) From the graph given we can see the values of A= x1,y1= 3,4 B=x2,y2= 0,0

Q: What are the conditions to satisfy to conduct a one-sample t-test for the population mean

A: Determine the conditions that used to satisfy to conduct the one-sample t-test for the population…

Q: 29 Using the combination formula expand (5+x)

A:

Q: 3 33. 3 .2 3.

A:

Q: 6. Using the data from the contingency table, obtain the value of the test statistic of our test. 7.…

A: Step 1: Given: x1 = number of colored oranges from Skittles brand = 77 x2 = number of colored…

Q: 2sinx +-cafx costX

A: We know that sin^2x+cos^2x=1 2sin^2x+1-cos^2x\cos^2x = 2sin^2x+sin^2x/cos^2x 3sin^2x/cos^2x = tan^2x

Q: 12 16 5n

A: Area of triangle= (1/2) × Base × Height

Q: 6-1 t.

A: