A cell's expected frequency can be defined as the number of people in its row divided by the total number of people, multiplied by the number in its column and is therefore denoted as option C.
<h3>What is Frequency?</h3>
This is defined as the number of occurrences of a repeating which takes place per unit time.It also helps to measure how frequent something occurs when counted or observed and is also used in the calculation of the different types of statistical data present or given.
This type of frequency is theoretical and are values which will most likely be in an experiment. it is calculated by multiplying the number in its column by the number of people in the row and dividing by the total number of people in this context.
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Answer: y ≤ 10
Step-by-step explanation:
16 ≥ 2y -4
Add 4 to both sides
16 + 4 ≥ 2y - 4 + 4
20 ≥ 2y
divide through by 2
20/2 ≥ 2y / 2
10 ≥ y
Therefore :
y ≤ 10
Answer:
IQR= (16)−(10)=6
Thus, option 'C' is true.
Step-by-step explanation:
Given the data
8, 9, 9, 10, 12, 12, 13, 14, 15, 15, 15, 16, 18, 19, 20
The interquartile range is equal to the difference between the 75th and the 25th percentiles
The 25th percentile is 10
The 75th percentile is 16
Finally,
IQR= (16)−(10)=6
Thus, option 'C' is true.
Answer:
Mean=20.5
standard deviation=13.28
Step-by-step explanation:
We are given six samples i.e.
36, 14, 21, 39, 11, and 2
Mean is the average of all the samples
Mean= sum of all samples/no. of samples
Mean=(36+14+21+39+11+2)/6
Mean=20.5
Standard deviation is the positive square root of variance where
variance= sum of square of samples/number of samples-(mean)²
variance=(36²+14²+21²+39²+11²+2²)/6-(20.5)²
= 596.5-420.25
= 176.25
standard deviation= √(176.25)
standard deviation= 13.28