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777dan777 [17]
3 years ago
6

Consider the distribution of exam scores​ (graded from 0 to​ 100) for 86 students when 38 students got an​ A, 28 students got a​

B, and 20 students got a C. Complete parts​ (a) through​ (d) below.
a. How many peaks would you expect for the​ distribution?
Mathematics
1 answer:
Bond [772]3 years ago
5 0

<u>Answer:</u>

There is only 1 peak in this distribution.

<u>Step-by-step explanation:</u>

In the distribution of exam scores (graded from 0 100)  for 86 students 38 students got an A, 28 students got a B, and 20 students got a C.

a) Since, 38 > 28 > 20 , there is only 1 peak for this distribution.  

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Answer:

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And we can find the probability with the complement rule and the normal standard distirbution and we got:

P(z>0.6875)=1-P(z

Step-by-step explanation:

Let X the random variable that represent the time spent reading of a population, and for this case we know the distribution for X is given by:

X \sim N(49,16)  

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