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SpyIntel [72]
3 years ago
10

According to the U.S. National Transportation Safety Board, the number of airline accidents by year from 1983 to 2006 were 23, 1

6, 21, 24, 34, 30, 28, 24, 26, 18, 23, 23, 36, 37, 49, 50, 51, 56, 46, 41, 54, 30, 40, and 31.
For the sample data, compute the mean and its standard error (from the standard deviation), and the median.
Mathematics
1 answer:
Lera25 [3.4K]3 years ago
4 0

Answer:

\bar X= 33.79167

s= 12.06497

SE= \frac{s}{\sqrt{n}}= \frac{12.06497}{\sqrt{24}}=2.463

Median= \frac{30+31}{2}= 30.5

Step-by-step explanation:

For this case we have the following data:

23, 16, 21, 24, 34, 30, 28, 24, 26, 18, 23, 23, 36, 37, 49, 50, 51, 56, 46, 41, 54, 30, 40, and 31

We can calculate the sample mean with the following formula:

\bar X = \frac{\sum_{i=1}^n X_i}{n}

And replacing we got:

\bar X= 33.79167

Then we can calculate the standard deviation with this formula:

s= \sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}

And replacing we got:

s= 12.06497

And the sample size for this case is n =24. We can calculate the standard error with this formula:

SE= \frac{s}{\sqrt{n}}= \frac{12.06497}{\sqrt{24}}=2.463

And the median for this case since the sample size is 24 first we need to sort the data on increasing order and we got:

16 18 21 23 23 23 24 24 26 28 30 30 31 34 36 37 40  41 46 49 50 51 54 56

And for this case the median would be the average from the position 12 and 13 and we got:

Median= \frac{30+31}{2}= 30.5

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eduard

Answer:

162

Step-by-step explanation:

8 0
2 years ago
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Brian spins a fair spinner numbered 1 - 5 and flips a fair coin.
Greeley [361]

Answer:  0.1

Step-by-step explanation:

If we spin a fair spinner numbered 1 - 5 and flips a fair coin.

Then, the possible outcomes will be :-

(1,T),(2,T), (3,T), (4,T), (5,T)\\\\(1,H),(2,H), (3,H), (4,H), (5,H)

i.e. total 10 possible outcomes.

The favorable outcomes = a 2 and a head  i.e. only 1 .

Now, the probability of obtaining a 2 and a head will be :_

\dfrac{\text{Number of favorable outcome}}{\text{Total outcomes}}\\\\=\dfrac{1}{10}=0.1

Hence, the  probability of obtaining a 2 and a head = 0.1

7 0
2 years ago
What are the intercepts of y=4x-2
Lemur [1.5K]
Answer:

To find the x-intercept, make y equal to zero, and solve for x. To find the y-intercept, make x equal to zero, and solve for y.

Explanation:

<span>y=4x−2</span>

<span>
</span>

X-Intercept


<span>0=4x−2</span>

<span>
</span>

Add 2 to both sides of the equation.


<span>2=4x</span>

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Divide both sides by 4.


<span><span>2/4</span>=x</span>

<span>
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Simplify.


<span><span>1/2</span>=x</span>

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Switch sides.


<span>x=<span>1/2</span></span>

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Y-Intercept


<span>y=4<span>(0)</span>−2</span>

<span>y=−2</span>


8 0
2 years ago
Drove 50 km on 6 L of gasoline. Which proportion would help determine how far she can travel on a full 40 L tank of gasoline?
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Answer:

50 : 6 = x : 40 is the proportion


Step-by-step explanation:

50 : 6 = x : 40

x = 50 * 40 : 6

x = 333.33

--------------------------

check

50 : 6 = 333.33 : 40

8.33 = 8.33

The answer is good






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dolphi86 [110]

Answer:

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Expand bracket;

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8 ≤ x

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