X=−9.14213562 , 19.14213562
Answer:
Step-by-step explanation:
Confidence intervals are constructed to estimate an unknown parameter of the population. This is usually population mean and sometimes, population standard deviation.
Since we are dealing with proportion, then the sample proportion would be used to determine the population proportion
Therefore, the pieces of information that the surveyor requires in order to construct the confidence interval are
a. the exact size of the sample that is surveyed
b. the proportion of people in the sample with the characteristic
d. the level of confidence desired
In order to solve, the sample, p proportion is determined.
p = number if people in the sample with the characteristic/ number of sample
q = 1 - p
Margin of error = z × √pq/n
Confidence interval = p ± margin of error
Answer:
The probability is 0.026 to 3 d.p
Step-by-step explanation:
To calculate this , we shall be using the Bernoulli approximation.
let P = percentage of voters supporting the increase = 41% = 41/100 = 0.41
q = percentage of voters not supporting = 100-41% = 59% = 59/100 = 0.59
Now we want to calculate that exactly 15 out of 25 will vote in favor
Mathematically that would be ;
25C15 p^15 q^10
= 25C15 0.41^15 0.59^10
= 0.025981307443 or simply 0.026 to 3 decimal places
Step-by-step explanation:
Hey there!
From the given figure;
An exterior angle is 127°.
To find: value of"X"
Now;
x+127° = 180°. [Being linear pair]
or, X = 180° - 127°
or, X = 53°
Therefore, the value of "X" is 53°.
<u>Hope</u><u> it</u><u> helps</u><u>!</u>
Well his salary is $40,000 dollars.
$72,750 - $40,000 = $32,750
This means that 5% of the value of investments he had sold was equal to $32,750.
The stockbroker sold $655,000 worth of investments.