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Feliz [49]
3 years ago
5

In the beginning of the study, a randomly selected group of 121 students scored an average of 252 words per minute on the readin

g speed test. Since the sample size is larger than 30, the cognitive psychologist can assume that the sampling distribution of M
Mathematics
1 answer:
Alborosie3 years ago
5 0

Answer:

Since the sample size is larger than 30, the cognitive psychologist can assume that the sampling distribution of M will be approximately normal.

Step-by-step explanation:

We use the central limit theorem to solve this question.

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, a sample size larger than 30 can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}

So

Since the sample size is larger than 30, the cognitive psychologist can assume that the sampling distribution of M will be approximately normal.

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How many centimetres is 0.7 inches? Round to the nearest tenth.
wlad13 [49]

it is 1.8 centimeters

7 0
2 years ago
What is the range of <br> 2,3,2
Aleonysh [2.5K]

Answer:

1

Step-by-step explanation:

Range is when you subtract the greatest to smallest.

So

3-2=1

4 0
3 years ago
6​(7x-4​y)-5 it says to use distributive property to answer
Alexeev081 [22]

Answer:

42x-24y-5

Step-by-step explanation:

We can start by using the distributive property.

This will help us rewrite the expression, since the terms in the parentheses can't be combined.

I'll attach an image to better explain this.

When using it, we'll get:

6*7x+6*-4y-5

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42x-24y-5

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3 0
3 years ago
A study on students drinking habits asks a random sample of 60 male UF students how many alcoholic beverages they have consumed
Alex17521 [72]

Answer:

A. (4.78, 6.90)

Step-by-step explanation:

Using the following formulas the lower and upper limits of the Interval are calculated

Lower limit = mean - (standard deviation /√sample size)* Zr

Upper limit = mean + (standard deviation /√sample size)* Zr

Zr depends on confidence interval  and can be found in a z table

Zr for 90% = 1.645

then

Lower limit = 5.84 - (4.98 /√60)* 1.645 = 4.78

Upper limit = 5.84 + (4.98 /√60)* 1.645 = 6.90

8 0
3 years ago
Solve for X.<br> X-3 - 2(6 - 2x) = 2(2x - 5)<br> A)<br> 3<br> B)<br> 5<br> C)<br> 9<br> D)<br> 11
Lera25 [3.4K]

☁️ Answer ☁️

annyeonghaseyo!

The answer is:

B - x = 5

Hope it helps!

Have a nice day hyung/noona!!~  ̄▽ ̄❤️

7 0
2 years ago
Read 2 more answers
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