Answer:
a) The mean of the probability distribution = 0.6
b) The variance of the probability distribution = 0.3
c) The standard deviation of the probability distribution = 0.5
Step-by-step explanation:
a) Data and Calculations:
number of dogs per household in a small town
Dogs Probability Expected Mean Diff Mean Diff.
Value Squared
0 0.650 0 -0.569 0.32376
1 0.216 0.216 -0.353 0.12461
2 0.087 0.174 -0.395 0.15603
3 0.026 0.078 -0.491 0.24108
4 0.014 0.056 -0.513 0.26317
5 0.009 0.045 -0.524 0.27458
The mean = 0.569 (Sum of expected value)
Variance = mean of squared differences = 0.27665 (1.38323/5)
Standard deviation = square root of variance = 0.526 = 0.5
Answer:
-5.5
Step-by-step explanation:
1. -3.1 + (-7.2) + 4.8
remove parentheses
add/subtract the numbers.
-3.1-7.2+4.8 = -5.5
Solution:
<u>Note that:</u>
- Area of circle: πr²
- r = 11 ft.
<u>Substitute the radius in the expression to find the area of the circle.</u>
- (π)(r²)
- => (22/7)(11²)
- => (22/7)(121)
- => 380.29 ft² (Rounded)
It will take 5 days for Montegro Flooring Company to complete this job
<u>Solution:</u>
Given, The Montegro Flooring Company can replace 200 square feet of carpet with tile in one day
They accept a job replacing carpet with tile in an apartment that measures 977.5 square feet
We have to find how many days will it take the Montegro Flooring Company to complete this job?
Now, according to given information,
200 square feet ⇒ 1 day
Then, 977.5 square feet ⇒ n days
Now, by chris cross method
Hence, the company requires 5 days approximately.
The second question is biased
