Determine whether the following proportion is true or false
2 answers:
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<u>Answer:</u>
<u>Step-by-step explanation:</u>
Given:
Mint condition coins =
Total number of coins =
Ratio
The questions asks for the ratio between mint condition coins to the total number of coins, so:
Mint condition coins : number of coins =
(simplified form)
Hope this helps :)
Answer:
0.7422 = 74.22% of scores are above 74.
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:
Calculate the proportion of scores above 74.
This is 1 subtracted by the pvalue of Z when X = 74. So
has a pvalue of 0.2578
So 1-0.2578 = 0.7422 = 74.22% of scores are above 74.