Question

Consider the following random sample of data:

1, 1, 7, -5, 3, -2, 1, -9, 2, 86

a) What is the variance of the sample data?

Round your response to at least 3 decimal places.

b) If the outlier is removed, what is the variance of the remaining sample data?

Round your response to at least 3 decimal places.

Answer #1

VARIANCE = 760.944

OUTLIER 86 REMOVED

VARIANCE = 21.861

Consider the following random sample of data:
13, 25, 30, 14, 21, 5, 9, 1, 101, 18
a) What is the median of the sample data?
Round your response to 2 decimal places.
b) If the outlier is removed, what is the median of the
remaining sample data?

Consider the following sample data set:
1 2 3 4 4 5
1. What is the mode?
2. What is the median?
3. What is the mean?
4. What is the sample standard deviation? Interpret it? Show
your algebra.
5. Find the IQR and find if there is any outlier?

Consider the following data for two independent random samples
taken from two normal populations.
Sample 1
10
7
13
7
9
8
Sample 2
8
7
8
4
6
9
(a)Compute the two sample means.
Sample 1:
Sample 2:
(b)Compute the two sample standard deviations. (Round your
answers to two decimal places.)
Sample 1:
Sample 2:
(c) What is the point estimate of the difference between the two
population means? (Use Sample 1 − Sample 2.)
(d) What is the...

Consider the following.
n = 8
measurements: 4, 3, 7, 7, 5, 5, 4, 6
Calculate the sample variance, s2, using the
definition formula. (Round your answer to four decimal places.)
s2 =
Calculate the sample variance, s2 using the
computing formula. (Round your answer to four decimal places.)
s2 =
Find the sample standard deviation, s. (Round your
answer to three decimal places.)
s =

Consider the following sample data.
6
3
19
9
5
12
Calculate the z-score for the following values.
a. 4
b. 18
c. 15
d. 19
(Round to two decimal places as needed.)

7. Consider the following data:
x 6 7 8 9 10
P( X = x ) 0.3 0.1 0.2 0.1 0.3
Step 1 of 5: Find the expected value E(X) E ( X ) . Round your
answer to one decimal place.
Step 2 of 5: Find the variance. Round your answer to one decimal
place.
Step 3 of 5: Find the standard deviation. Round your answer to
one decimal place.
Step 4 of 5: Find the value of P(X<9)P(X<9)....

Consider the following data: 6, 8, 2, 3, 4, 4, 5, 5, 9, 6, 6, 7,
7 ,7, 7, 8, 8, 8, 8, 9, 9.
What type of distribution is this?

Consider the following data:
x
3
4
5
6
7
P(X=x)P(X=x)
0.2
.1
.2
.2
0.3
Copy Data
Step 2 of 5:
Find the variance. Round your answer to one decimal place.
Step 3 of 5:
Find the standard deviation. Round your answer to one decimal
place.
Step 4 of 5:
Find the value of P(X>6)P(X>6). Round your answer to one
decimal place.
Step 5 of 5:
Find the value of P(X≤5)P(X≤5). Round your answer to one decimal
place.

Consider the following sample data values.
18 13 2 4 9 6 5 1 12
find sample variance and sample standard deviation

Consider the data.
xi
1
2
3
4
5
yi
3
7
5
11
14
The estimated regression equation for these data is
ŷ = 0.20 + 2.60x.
(a)
Compute SSE, SST, and SSR using equations
SSE = Σ(yi −
ŷi)2,
SST = Σ(yi −
y)2,
and
SSR = Σ(ŷi −
y)2.
SSE = SST = SSR =
(b)
Compute the coefficient of determination
r2.
r2
=
Comment on the goodness of fit. (For purposes of this exercise,
consider a...

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