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Phantasy [73]
3 years ago
6

9. If the area of a rectangle measures 20 square inches, the side lengths

Mathematics
1 answer:
DochEvi [55]3 years ago
3 0

Answer:

True

Step-by-step explanation:

The given statement is true.

Area of a rectangle is length times width.

A rectangle with the side length of 4 and 5 inches would have an area of 20 square inches.

A=l*w\\\\A=4*5\\\\A=20

Hope this helps.

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a sample size n=5 is selected from a population. under what conditions is the sampling distribution x normal?​
Korolek [52]

Answer:

Look below

Step-by-step explanation:

The mean of the sampling distribution always equals the mean of the population.

μxˉ​=μ

The standard deviation of the sampling distribution is σ/√n, where n is the sample size

σxˉ​=σ/n​

When a variable in a population is normally distributed, the sampling distribution of for all possible samples of size n is also normally distributed.

If the population is N ( µ, σ) then the sample means distribution is N ( µ, σ/ √ n).

Central Limit Theorem: When randomly sampling from any population with mean µ and standard deviation σ, when n is large enough, the sampling distribution of is approximately normal: ~ N ( µ, σ/ √ n ).

How large a sample size?

It depends on the population distribution. More observations are required if the population distribution is far from normal.

A sample size of 25 is generally enough to obtain a normal sampling distribution from a strong skewness or even mild outliers.

A sample size of 40 will typically be good enough to overcome extreme skewness and outliers.

In many cases, n = 25 isn’t a huge sample. Thus, even for strange population distributions we can assume a normal sampling distribution of the mean and work with it to solve problems.

6 0
2 years ago
A dog ran along a fence 10 times. The fence is 5 feet 3 inches long. How far did the dog travel? (12 inches = 1 foot
shusha [124]

5 feet and 3 inches, 1 foot=12 inches, 12×5=60+3=63×5=315. so your answer is 315

4 0
3 years ago
Prove 3 root 7 is a rational number
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8 0
3 years ago
Bill is in a class of 15 boys and 35 girls 40 percent of the students in the class take the bus to school how many students do n
GREYUIT [131]

the gender of the kids does not matter so it can be discarded.

you add up how many boys and girls in the class to make a total of 50 kids

your 100% is 50

meaning 40% of 50 is 20

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6 0
3 years ago
If 7x+3=24, find the value of -5 - 6x.<br><br> a)-23<br> b)-7<br> c)1<br> d)17
OlgaM077 [116]
A. -23

If 7x plus 3 equals 24, X equals 3. -5 minus 6 time X(3) equals -23.
6 0
3 years ago
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