Answer:
5
Step-by-step explanation:
-17, -17, -16 ,-9, 3, 7 ,7, 17, 17, 18
median ( middle number): (3+7)/2= 10/2= 5
I'm pretty sure the above fractions are equivalent because if you reduce 5s/15t then it equals s/3t.
Answer:
X=12
Step-by-step explanation:
2/3x+4=12
Multiply 3 to both sides of the equation
2x+12=36
Subtract 12 on both sides
2x=24
Divide by 2 on both sides
X=12
Answer:
P(x ≥ 30) = 0.3859
Step-by-step explanation:
When the distribution is normal, we use the z-score formula.
In a set with mean
and standard deviation
, the zscore of a measure X is given by:

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this question, we have that:

This probability is going to be 1 subtracted by the pvalue of Z when X = 30. So



has a pvalue of 0.6141
1 - 0.6141 = 0.3859
So
P(x ≥ 30) = 0.3859