The estimate for the mean is of: $227.15.
The estimate for the standard deviation is of: $219.4.
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- First, we estimate the mean, which is the <u>sums of the multiplications of the relative frequencies and the halfway point of each interval.</u>
- The size of the sample was of

The halfway points and relative frequencies are given as follows, and will be used to calculate both the mean and the standard deviation:
- (0 + 199)/2 = 99.5, with a relative frequency of 339/520 = 0.6519.
- (200 + 399)/2 = 299.5, with a relative frequency of 93/520 = 0.1788.
- (400 + 599)/2 = 499.5, with a relative frequency of 53/520 = 0.1019.
- (600 + 799)/2 = 699.5, with a relative frequency of 17/520 = 0.0327.
- (800 + 999)/2 = 899.5, with a relative frequency of 9/520 = 0.0173.
- (1000 + 1199)/2 = 1099.5, with a relative frequency of 8/520 = 0.0154.
- (1200 + 1399)/2 = 1299.5, with a relative frequency of 1/520 = 0.0019.
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Thus, the mean is of:

The mean of the amount of savings is of $227.15.
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The standard deviation is the <u>square root of the sum of the difference squared between each observation and the mean</u>, thus:

The standard deviation is of $219.4.
A similar problem is given at brainly.com/question/24651197
Answer:
The intensity of the first earthquake is 6.31 times the second one
Step-by-step explanation:
The given formulae is M=log(
)
Here for both the earthquakes the value of S is same.
Let the Intensity of the first earthquake be I1 and the second be I2.
Given M1=7.5
M2=6.7
Now M1=log(
)------1
M2=log(
)-----2
Now subtract 1 and 2 we get
M1-M2=log(
)
I1/I2=
I1=I2(
I1=I2*6.31
Answer:
D
Step-by-step explanation:
Answer:
0.980
Step-by-step explanation:
I know how to do this just can't give explanation right now
32
+72
104
104 divided by 2 is 52 start off there