PLEASE HELP!!!!!! !!!!
1 answer:
You might be interested in
bearing in mind that, on the III Quadrant, sine as well as cosine are both negative, and that hypotenuse is never negative, so, if the sine is -4/5, the negative number must be the numerator, so sin(x) = (-4)/5.
Answer:
Step-by-step explanation:
In the normal distribution curve, we will have 5% below 10 months [horizontal axis] and 75% below 13 months [horizontal axis].
We need to find z-score using z-table [normal table] that corresponds to
5% = 0.05
and
75% = 0.75
Zscore formula:
Where mu is mean and sigma is standard deviation [these are the 2 parameters we are seeking]
So, 0.05 corresponds to z = -1.64, and
0.75 corresponds to z = 0.67
Now we put both of these into z-score formula and solve both equations for mu and sigma.
and
The first equation becomes:
Now, simplifying 2nd equation and putting this in:
Now finding mu:
These two MU(mean) and SIGMA(standard deviation) are the 2 parameters.