Question

PLZ HELP!!!!!!!
Tammy’s last four homework scores were 68, 76, 70, and 74. The mean absolute deviation of her scores is________ .
a.0
b.3
c.12
d.72
Tammy worked hard on yesterday’s assignment and feels confident that this homework score will be at least a 90. Predict what will happen to her mean absolute deviation if she is correct: _________.
a.It will stay the same
b.It will go up
c.It will go down
Tammy was correct. She earned a 92! The new mean absolute deviation of her homework scores now that they are 68, 76, 70, 74, and 92 is:________ .
a.2.4
b.3
c.6.4
d.32

Answer 1

Answer:

1. 3

2. It will go up.

3. 6.4

Step-by-step explanation:

took the test

Answer 2

1.  Option D is correct

2.  Option B is correct

3.  Option C is correct

Mean

Mean is simply defined as the average of the given set of numbers. The mean is considered as one of the measures of central tendencies in statistics. The mean is said to be an arithmetic mean. It is the ratio of the sum of the observation to the total number of observations.

How to get the solution?

1.  Tammy’s last four homework scores were 68, 76, 70, and 74.

The mean will be

$\rm Mean = \dfrac{sum\ of\ the\ numbers}{Total\ number}\\\\Mean = \dfrac{68+76+70+74}{4}\\\\Mean = \dfrac{288}{4}\\\\Mean = 72$

2.  Tammy worked hard on yesterday’s assignment and feels confident that this homework score will be at least a.

$\rm Mean = \dfrac{sum\ of\ the\ numbers}{Total\ number}\\\\Mean = \dfrac{68+76+70+74+90}{5}\\\\Mean = \dfrac{378}{5}\\\\Mean = 75.6$

Thus, it will go up.

3.  Tammy was correct. She earned a 92. The new mean absolute deviation of her homework scores now are 68, 76, 70, 74, and 92.

$\rm Mean = \dfrac{sum\ of\ the\ numbers}{Total\ number}\\\\Mean = \dfrac{68+76+70+74+92}{5}\\\\Mean = \dfrac{380}{5}\\\\Mean = 76$

1.  Option D is correct

2.  Option B is correct

3.  Option C is correct

More about the mean link is given below.

https://brainly.com/question/2426692