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vladimir2022 [97]
3 years ago
12

10) A competency test has scores with a mean of 255 and a standard

SAT
1 answer:
melomori [17]3 years ago
8 0

Answer:

The percentage of scores higher than 72 is 99.85%

Explanation:

The empirical rule states that about 68% of observations falls within the first standard deviation (µ ± σ), 95% within the first two standard deviations (µ ± 2σ), and 99.7% within the first three standard deviations (µ ± 3σ)

We can use the relationship below

255-σ(61)=72

61σ=255-72

61σ=183

σ=3

The area is as shaded below

The percentage of scores higher than 72 is 99.7%+0.15%=99.85%

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the table below shows the ages of houses to the nearest year in a neighborhood. using the age of the houses as the random variab
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Probability distributions are used to represent data and their probabilities

The table entry is given as:

<u>Age of House      Number of Houses</u>

1                                         15

2                                        20

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Start by calculating the probability of selecting a house that has a certain age.

This is calculated as:

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So, we have:

P(1) = \frac{15}{90} = 0.17

P(2) = \frac{20}{90} = 0.22

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P(4) = \frac{30}{90} = 0.33

This means that the graph that represents the probability distribution must show that the probability of 1 is 0.17; 2 is 0.22; 3 is 0.28; 4 is 0.33.

Read more about probability distribution at:

brainly.com/question/9385303

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How many integers between 2022 and 2388 have four distinct digits arranged in an increasing order?.
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Answer:

The total number of integers between 2020 and 2400 have four distinct digits arranged in increasing order is 15.

Explanation:

Given :

Numbers  --  2020 and 2400

The following steps can be used in order to determine the total number of integers between 2020 and 2400 have four distinct digits arranged in increasing order:

Step 1 - According to the given data, there are two numbers 2020 and 2400.

Step 2 - So, the integers having four distinct digits arranged in increasing order are:

2345, 2346, 2347, 2348, 2349, 2356, 2357, 2358, 2359, 2367, 2368, 2369, 2378, 2379, and 2389.

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<h3>What is an accretionary wedge?</h3>

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This ultimately implies that, sediments that are scraped off the subducting plate usually builds up in an accretionary wedge.

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