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Sophie [7]
3 years ago
9

A 4 pack of jump ropes costs $15.28. What is the unit price? per jump rope​

Mathematics
1 answer:
babymother [125]3 years ago
3 0

Answer:

Each jump rope will cost: $15.28 ÷ 4 = $3.82

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g You are planning an opinion study and are considering taking an SRS of either 200 or 600 people. Explain how the sampling dist
Katen [24]

Answer:

By the Central Limit Theorem, both would be approximately normal and have the same mean. The difference is in the standard deviation, since as the sample size increases, the standard deviation decreases. So the SRS of 600 would have a smaller standard deviation than the SRS of 200.

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For the sampling distribution of size n of a sample proportion p, the mean is p and the standard deviation is s = \sqrt{\frac{p(1-p)}{n}}

Differences between SRS of 200 and of 600

By the Central Limit Theorem, both would be approximately normal and have the same mean. The difference is in the standard deviation, since as the sample size increases, the standard deviation decreases. So the SRS of 600 would have a smaller standard deviation than the SRS of 200.

6 0
3 years ago
If you're starting salary is 40,000 and you receive a 3% increase at the end of every year what is the total amount in dollars y
storchak [24]
\bf \qquad \textit{Amount for Exponential Growth}\\\\
A=I(1 + r)^t\qquad 
\begin{cases}
A=\textit{accumulated amount}\\
I=\textit{initial amount}\to &40000\\
r=rate\to 3\%\to \frac{3}{100}\to &0.03\\
t=\textit{elapsed time}\to &15\\
\end{cases}
\\\\\\
A=40000(1+0.03)^{16}\implies A=40000(1.03)^{16}
7 0
3 years ago
What is the measure of 27?<br> 13<br> 4<br> 1370<br> A<br> 330<br> B.<br> 1370<br> 430<br> D<br> 470
finlep [7]

Answer:

B. yes.

Step-by-step explanation:

dd_rrdrdy]uuhhhgffdddddddddddddddddddddd

4 0
3 years ago
Write an equation and solve.<br> How opd am I if 400 reduced by 2 times my age is 244?
seropon [69]

Answer:

78

Step-by-step explanation:

x = your age

400 - 2x = 244

subtract 400 from both sides of the equation:

-2x = -156

divide both sides by -2:

x = 78

4 0
3 years ago
Read 2 more answers
Find the rate of increase:<br> Original amount: $2000<br> Final amount: $3000
Genrish500 [490]

Answer:

21

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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