1 Simplify \frac{14}{30}
30
14
to \frac{7}{15}
15
7
.
\frac{7}{15}\div 14.00
15
7
÷14.00
2 Use this rule: a\div \frac{b}{c}=a\times \frac{c}{b}a÷
c
b
=a×
b
c
.
\frac{7}{15}\times \frac{1}{14.00}
15
7
×
14.00
1
3 Use this rule: \frac{a}{b}\times \frac{c}{d}=\frac{ac}{bd}
b
a
×
d
c
=
bd
ac
.
\frac{7\times 1}{15\times 14.00}
15×14.00
7×1
4 Simplify 7\times 17×1 to 77.
\frac{7}{15\times 14.00}
15×14.00
7
5 Simplify 15\times 14.0015×14.00 to 210210.
\frac{7}{210}
210
7
6 Simplify.
1/30

(adding the second equation to the first one)




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Answer:
4√6^3
Step-by-step explanation:
Answer:
Use the normal distribution if the population standard deviation is known.
Use the student's t distribution when the population standard deviation is unknown.
Explanation:
A mound-shaped distribution refers to the normal distribution.
A good sample size for testing against the normal distribution should be
n >= 30.
The condition for the sample size is satisfied.
However, we are not given the population standard deviation, therefore it is assumed to be unknown.
Therefore the student's t distribution should be used.