Answer:
a) -0.5
Step-by-step explanation:
Correlation
- Correlation is a technique that help us to find or define a relationship between two variables.
- It is a measure of linear relationship between two quantities.
- A positive correlation means that an increase in one quantity leads to an increase in another quantity
- A negative correlation means with increase in one quantity the other quantity decreases.
- Values between 0 and -0.3 tells about a weak negative linear relationship, values between -0.3 and -0.7 shows a moderate negative correlation and a correlation value of of -0.7 and -1.0 states a strong negative linear relationship.
Anxiety symptoms and life satisfaction are negatively correlated. As life satisfaction increases the anxiety symptoms decreases.
Thus, a moderate correlation between them can be expressed by a correlation coefficient of -0.5
The answer would be 153.86... First of all let's establish the formula to work out the area if a circle - it's area = pi * (radius * radius)... Then let's substitute the values... So we know that the diameter is 14 inches so that must mean the radius is 7 inches, since the radius is simply half of the diameter... Then we multiply pi (I am using 3.14) with 49 inches (since 7 * 7 = 49)... Then the answer you get is 153.86
Hope this helps!! (≧▽≦)
Answer: 0.0136
Step-by-step explanation:
Let events are:
A = alarm A will fail
B= alarm B will fail
We have given ,
P(A) = 0.004 , P(B)=0.01
Since both events are independent , so
P(A and B) = P(A) x P(B)
= 0.04 x 0.01 =0.0004
i.e. P(A and B) =0.0004
Now , P(A or B) = P(A)+P(B)-P(A and B)
= 0.004+ 0.01-0.0004=0.0136
Hence, the probability that at least one alarm fails in the event of a fire is 0.0136 .
Try this solution. If it is possible, check arithmetic part.