Answer:
First question:
Top 6%: 4.87 ounces
Bottom 6%: 4.75 ounces
Second question:
Top 7%: Score of 649.4.
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.
For the first problem, we have that:
Top 6%
The value of X when Z has a pvalue of 0.94. This is
Bottom 6%
The value of X when Z has a pvalue of 0.06. This is
For the second problem, we have that:
Top 7%
The value of X when Z has a pvalue of 0.93. This is
Hwy friend
Let's figure this out.
5+7+4+4= 20 total students
4/20 students have hazel eyes
6/20 students do not have hazel eyes
16 / 20 =.8
80% chance that 1 is not hazel
80% that the 2nd isn't hazel
To find the probability that both will not be hazel you must multiply:
80% by 80% (.8 * .8)
.8 *.8 = .64
There is a 64% chance both of the selected students wont have hazel eyes.
Answer:
169
Step-by-step explanation:
10 x 16.6 = 168
168 + 1 = 169
7(4x+4)+5x, 28x+28+5x, 33x+28. Answer: A.