Answer:
a)
b)
c) Mary's score was 241.25.
Step-by-step explanation:
Problems of normally distributed samples can be solved using 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 problem, we have that:
a) Find the z-score of John who scored 190
b) Find the z-score of Bill who scored 270
c) If Mary had a score of 1.25, what was Mary’s score?
Mary's score was 241.25.
41 x 0.15 = 6.15, which means only 6 bands will compete.
Hope this helps.
You add up all of the Frequencies together (to get 50)
The number 6 was rolled 9 times. So that makes it 9/50.
9/50 -> .18 or 18%
Does that help?
Answer:
The answer is 80 because 10x8 is 80 and the nearest 10 means it need to have a 0 behind so it is 80