A psychology student wishes to investigate differences in political opinions between business majors and political science major
2 answers:
You might be interested in
<u>Given</u>:
The given expression is
We need to determine the factor of the given expression.
<u>Factor</u>:
Let us rewrite the given expression.
Thus, we have;
Since, the above expression is of the form , let us apply the identity
Thus, we have;
------ (1)
Now, we shall factor the term
Substituting the above expression in equation (1), we have;
Therefore, the factor of the given expression is
Hence, Option B is the correct answer.
Answer:
0.0359
Step-by-step explanation:
Data provided:
mean values of three independent times are 15, 30, and 20 minutes
the standard deviations are 2, 1, and 1.6 minutes
Now,
New Mean = 15 + 30 + 25 = 65
Variance = ( standard deviation )²
or
Variance = 2² + 1² + 1.6² = 7.56
therefore,
Standard deviation = √variance
or
Standard deviation = 2.75
Thus,
Z-value =
or
Z-value = - 1.81
from the Z-table
the Probability of Z ≤ -1.81 = 0.0359