The final exam scores in a statistics class were normally distributed with a mean of

Mathematics

1 answer:

IRISSAK [1]2 years ago

4 0

Answer:

68.27%

Step-by-step explanation:

By the Empirical Rule, as 65% and 75% are both one standard deviation apart from the mean of 70%, then this represents 68.27% of the data.

You might be interested in

A shopkeeper marks his goods at 40% above cost (the price he pays for the goods) and then offers a 25% discount.if a jacket cost

Pachacha [2.7K]

Answer:

A shopkeeper marks:

$200 * 1.4 = $280

Step-by-step explanation:

With a discount of 25%:

$280 * 0.75 = $210

3 0

2 years ago

Vector u has its initial point at (-7, 2) and its terminal point at (11, -5). Vector v has a direction opposite that of vector u

salantis [7]

$\bf u\implies 
\begin{cases}
(-7,2)\\
(11,5)
\end{cases}\implies [11-(-7)]~,~[5-2]\implies (11+7)~,~(5-2)
\\\\\\
\stackrel{\textit{component form}}{\ \textless \ 18~,~3\ \textgreater \ }\\\\
-------------------------------\\\\
||u||=\sqrt{18^2+3^2}\implies ||u||=\sqrt{333}\implies ||u||=\sqrt{9\cdot 37}
\\\\\\
||u||=\sqrt{3^2\cdot 37}\implies ||u||=3\sqrt{37}\\\\
-------------------------------$

$\bf \ \textless \ -18~,~-3\ \textgreater \ \impliedby \textit{opposite vector to \underline{u}}
\\\\\\
3\cdot 3\sqrt{37}\implies 9\sqrt{37}\impliedby \textit{3 times the magnitude of \underline{u}}
\\\\\\
3\ \textless \ -18,-3\ \textgreater \ \implies \stackrel{\textit{component form of "v"}}{\ \textless \ -54~,~-9\ \textgreater \ }\impliedby \textit{3 times as long as \underline{u}}$

7 0

3 years ago

Read 2 more answers

Mr. Rodriguez bought a supply of 20 Reams of printer paper. Each Ream Contains 500 sheets of paper. How many sheets of printer p

Umnica [9.8K]

Multiply its 10'000 I hope this helps

4 0

3 years ago

Read 2 more answers

How can you minimize the risk from your investments?

vlabodo [156]

by common sense I can tell is C.) by investigating in a variety of investment options!