To answer this, we will look at simple definitions of each term. From the definitions, it will be clear which one is correct.
<u>What is mode?</u>
It is the most occurring number.
<u>What is interquartile range?</u>
It is the difference between third quartile and first quartile.
<u>What is range?</u>
It is largest number minus the smallest number.
<u>What is mean absolute deviation (MAD)?</u>
It is the average distance of each data point from the mean.
<u>What is a quartile?</u>
It is one of the four groups in which a dataset is divided.
From the simple definitions of each term, we can clearly see that Mean Absolute Deviation (MAD), answer choice D, is the correct answer.
Answer: Mean Absolute Deviation
A copy of the diagram is shown below
Point D is the intersection of three angle bisector.
BE is the angle bisector of ∠B
CF is the angle bisector of ∠C
AG is the angle bisector of ∠A
Point D is also the intersection between three perpendicular bisector
BE is the perpendicular bisector of AC
AG is the perpendicular bisector of BC
CF is the perpendicular bisector of AB
Hence the correct statements is statement 1 and statement 4
Answer:
30
Step-by-step explanation:
The sample size should be 30 for the given confidence interval of 90%.
Sample size is calculated as follows:
Sample size = Z score ^2 * standard deviation * [ 1 - Standard deviation] / margin of error^2
For the given 90% confidence level, the sample size calculated as;
Sample size = 1.645^2 * 2.3 [1 - 2.3] / 0.01^2
sample size = 30.