Will mark brainiest
2 answers:
Answer:
N = 55
Step-by-step explanation:
<h2><u>make use of Pythagoras theorem </u></h2>which is :
<h3><em>c^2 = a^2 + b^2</em></h3>where c is the hypotenuse
a is the adjacent
b is the opposite
c = 73
a = 48
b = N
now plug these in the formula
73^2 = 48^2 + N^2
now make N the subject of formula
73^2 - 48^2 = N^2
3025 = N^2
= N
N = 55 --- the murder was not done with a fallen object
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Answer:
The observation would be considered unusual because it is farther than three standard deviations from the mean.
Step-by-step explanation:
Problems of normally distributed samples are 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.
When Z has an absolute value higher than 2, the observation is considered unusual.
In this problem, we have that:
So the correct answer is:
The observation would be considered unusual because it is farther than three standard deviations from the mean.