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Crank
2 years ago
6

What is the value of 67th percentile in a standard normal distribution?

SAT
1 answer:
Vikki [24]2 years ago
8 0

Let Z be a random variable following the standard normal distribution with mean µ = 0 and standard deviation σ = 1.

The 67th percentile of the distribution is the value z that separates the bottom 67% of the distribution from the top 100% - 67% = 33%. In terms of probability, we have

Pr[Z ≤ z] = 0.67

Use the inverse CDF for the normal distribution (or lookup z scores in a table) to find

z = ɸ⁻¹(0.67) ≈ 0.4399

where ɸ(z) is the CDF for the normal distribution.

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What is main difference between the SAT-I and SAT-II?
Mrrafil [7]

Originally, the SAT I was meant to test aptitude and the SAT II was meant to test achievement. That is to say, one tested what you were capable of and the other tested what you knew. But when the College Board moved away from the idea that the SAT I tests innate ability, they framed it as a reasoning test, making the difference between the two less defined.

With the latest changes, the SAT I (now just the SAT) is more focused than ever testing knowledge rather than logic. At this point, I would say that the SAT tests general knowledge and and the Subject Tests assess topical knowledge.

5 0
3 years ago
Maria is considering buying a television and a refrigerator for her new apartment. Her monthly budget is $200. Maria will pay an
atroni [7]

Answer:

Explanation:

Maria will pay an extra amount of $924 to &951  to buy the television, rather than waiting until she saves up enough money to pay cash for it.

If Maria saves her money and pays cash, she can own a refrigerator in 4 months.

There are 52.3 weeks in a year, and depending on when she buys it, she can manage to make 52 or 53 payments that would make a total of $1404  a year or $1431  a year, if paying cash is $480, the difference would be either $924 or $951.

The refrigerator costs $800 and with the budget, she has a month, she can buy one after 4 months.

4 months at $200 a month= $800

8 0
3 years ago
One people mover has a velocity of 2m/s and is used to move people to a gate 200 m away two different people were traveling to t
Ne4ueva [31]

Answer:

60 sec.

Explanation:

The first person has to travel 200m at 2 m/s. It will take him 200/2=100 seconds to reach the gate. The second person is moving towards the gate at 2 + 3 meters per second so it will take her 200/5 = 40 seconds to reach the gate. Therefore, person #1 needs an extra 100-40 = 60 seconds.

4 0
3 years ago
What are three events about matter
ELEN [110]

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4 0
3 years ago
Read 2 more answers
A photographic stop bath contains 160ml of pure acetic acid.
NeTakaya

Answer:

Solving for the Percent by Volume

The v/v concentration of acetic acid in the stop bath is 24.6%.

Explanation:

To answer the question, we need to identify certain information stated in the question. Let us write down what’s given:

Volume of solute = 160 mL

Volume of solution = 650 mL

Next, we need to determine what is required, in this case, the percent by volume. Now, let us look at the formula:

v/v concentration = (solute volume / volume of the solution) * 100

Solution:

Percent by Volume = (160 / 650) * 100

Percent by Volume = 0.2461538461538462 * 100

Percent by Volume = 24.61538461538462

Rounded off = 24.6%

Therefore, the final answer is 24.6%

Explanation:

7 0
2 years ago
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