Answer:
470
Step-by-step explanation:
The units digit ( the last 6) is >= 5 so we add 1 to the tens digit ( which is also 6).
So its 470.
For 39% of all observations that are greater than z on the normal distribution table, the percentage of observations that are lesser than z is
100 - 39 = 61%
The proportion is 61/100 = 0.61
From the normal distribution table, the value of z corresponding to this proportion is 0.28
Thus, the required value of z is 0.28
Answer:
4.5
Step-by-step explanation:
First we need to turn the ratio of 1 : 3 into a fraction
1:3 = 1/3
Next we need to square that fraction
1 x 1 = 1
3 x 3 = 9
Then we turn those numbers into a fraction
1/9
We turn the .5 into a fraction
.5/x
And cross multiply both fraction by each other
1/9 x .5/x
1 x X = X
9 x .5 = 4.5
So
4.5 = X
Answer:
12
Step-by-step explanation:
1) to calculate the length of RT (in ΔRST):
SR/sin60°=12√3 / (√3/2)=12.
2) in ΔQRT RT=RQ=x (the m∠T=m∠Q !), then x=12.
Answer:
The expected value of the sample mean is the population mean, and the SE of the sample mean is the SD of the population, divided by the square-root of the sample size
Step-by-step explanation:
