Answer:
86
Step-by-step explanation:
Mean scores of first test =
Standard deviation of first test scores =
Mean scores of second test =
Standard deviation of second test scores =
We have to find if a student scores 29 on his first test, what will be his equivalent score on the second test. The equivalent scores must have the same z-scores. So we have to find the z-score from 1st test and calculate how much scores in second test would result in that z-score.
The formula for z-score is:
Calculating the z-score for the 29 scores in first test, we get:
This means, the equivalent scores in second test must have the same z-scores.
i.e for second test:
Rounding of to nearest integer, the equivalent scores in the second test would be 86.
Complete Question
The complete question is shown on the first uploaded image
Answer:
The second option is the correct option
Step-by-step explanation:
From the question we are told that
The sample proportion is
The Null Hypothesis is
The reason for this is that the this original claim when represented mathematically does not contain an equality sign () so the null hypothesis is the compliment of it ( i.e )
The Alternative hypothesis is
#1. 720 Nm
Work = force x distance
Work = 80N x 9m = 720 Nm
#2. 90J
Assume no energy lost in the process,
<span>Kinectic energy=(80N - 70N) x 9m
= 90J
#3. 630J
Heat energy = work - kinetic energy
Heat energy = 720J - 90J
= 630J</span>
To do his work that he didn't want to do.
Answer: 3,583.32
Step-by-step explanation:
Use money chimp calculator