This question is incomplete, the complete question is;
In a survey, 55% of the voters support a particular referendum. If 40 voters are chosen at random,
find the mean and variance for the number of voters who support the referendum.
Answer:
a) The Mean is 22
b) Variance is 9.9
Step-by-step explanation:
Given that;
55% of the voters support a particular referendum p = 0.55
q = 1 - p = 1 - 0.55 = 0.45
sample size n = 40
a)
Mean = sample size n × p
Mean = 40 × 0.55
Mean = 22
Therefore the Mean is 22
b)
Variance = n × p × q
so we substitute
Variance = 40 × 0.55 × 0.45
Variance = 9.9
Therefore the Variance is 9.9
Answer:
hope this helps
Step-by-step explanation:
We are given the an area of
173.6 cm
and a height of 9 cm.
We also know that the formula for area is lw, meaning we can substitute the area for lw
in the volume formula.
Now let's plug in what we know into the formula and solve for the volume:
V=(173.6 cm2)(9 c)=1562.4 cm3 The volume of the rectangular prism is
1562.4 cm3
.
Answer:
The answer is 80 and 89 because on the last sentence states that the average lie between these two numbers
Step-by-step explanation: plz mark brainliest if im right
It is 12 because when you divide 12 from 144 it equals 12 so that is your answer
Answer:
91.6
Step-by-step explanation:
The formula to find the area of a circle is A=πr^2. we are given the radius so if we plug it in and use 3.14 for pi we get. 3.14*5.4mi^2. This equals 91.5624 mi, rounded to the nearest tenth it is 91.6 mi.