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4 years ago

9,13,43,55 what is the mean absolute deviate (MAD) of their ages

Mathematics

1 answer:

lisov135 [29]4 years ago

7 0

Answer:

The mean absolute deviation of this data $\{9,13,43,55\}$ is $MAD =19$ .

Step-by-step explanation:

The mean absolute deviation (MAD) of a dataset is the average distance between each data point and the mean. It gives us an idea about the variability in a dataset.

The steps to find the MAD include:

find the mean (average)
find the difference between each data value and the mean
take the absolute value of each difference
find the mean (average) of these differences

To find the mean absolute deviation of this data $\{9,13,43,55\}$ you must

Step 1: Calculate the mean.

$\:mean=\bar{x}= \frac{9+13+43+55}{4} =\frac{120}{4}=30$

Step 2: Calculate the distance between each data point and the mean and take the absolute value of each difference .

$|9-30|=21\\|13-30|=17\\|43-30|=13\\|55-30|=25$

Step 3: Add the distances together.

$21+17+13+25=76$

Step 4: Divide the sum by the number of data points.

$MAD = \frac{76}{4} =19$

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Answer:

$\boxed{\sf x- intercepts = 0 , 5 \ and \ -4}$

Step-by-step explanation:

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For finding the x intercept , equate the given function with 0, we have ;

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Divide both sides by 2 ,

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Again ,

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Similarly ,

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{ See attachment also for graph } .

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3 years ago

a university is comparing the grade point averages of biology majors with grade point averages of engineering majors. the univer

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Answer:

H0 : μEng = μBio

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Null hypothesis is the initial truth, which is that ; there is no difference in the mean grade point average of both biology and engineering majors

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The Alternative hypothesis is the opposite of the null, which is stated has ; there is difference between the average GPA of both Engineering and Biology majors

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