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My name is Ann [436]
3 years ago
8

Part-time weekly earnings ($) by college students.

Mathematics
1 answer:
alexira [117]3 years ago
5 0

Answer:

There is a significant linear correlation between the two variables.

Step-by-step explanation:

Given that part time weekly earnings are

x y

 

10 93

15 171

20 204

20 156

35 261

 

 

 

Correlation 0.9199

H0: r=correlatin =0

Ha: r ≠0

(two tailed test)

r difference = 0.9199

t = r*\sqrt{(n-2)/(1-r^2)} \\=4.063

p value < 0.0001

Since p <0.05 we reject null hypothesis

There is a significant linear correlation between the two variables.

Download xlsx
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If the coefficient of determination for a data set is 0.25 and the SSE for the data set is 6, what is the SST for the data set ?
Cerrena [4.2K]

Answer: The SST for the data set is 8.

Step-by-step explanation:

Since we have given that

Coefficient of determination (R²) = 0.25

SSE for the data = 6

SST = ?

As we know the formula for coefficient of determination:

R^2=1-\dfrac{SSE}{SST}\\\\0.25=1-\dfrac{6}{SST}\\\\0.25-1=-\dfrac{6}{SST}\\\\-0.75=-\dfrac{6}{SST}\\\\SST=\dfrac{6}{0.75}\\\\SST=8

Hence, the SST for the data set is 8.

7 0
4 years ago
Read 2 more answers
8.
Anastaziya [24]

Answer:

C. m(h) = 5.25h; $11.81

Step-by-step explanation:

Answer: Crystal will earn $11.81.

Step-by-step explanation:

Since we have given that

Cost per hour mowing lawns = $5.25

Let the number of hours be 'h'.

Let the amount of money be 'm'

So, According to question, we get

Here h = 2 hours and 15 minutes

So,

So, Crystal will earn if she works for 2 hours and 15 minutes will be

Hence, Crystal will earn $11.81.

8 0
3 years ago
Write the slope intercept form Through:(1,-5) and(4, -1)
erastovalidia [21]

Answer:

Slope intercept form is

y=\frac{4}{3} x- \frac{19}{3}

4 0
3 years ago
BRAINLIEST!!! Which graph shows a dilation?
Kruka [31]
It’s the second one because it’s 2x the measurement of the smaller graph
4 0
3 years ago
If the surface area of the rectangular prism is 224 cm 2, what is the height?
ira [324]

Answer:

12 cm

Step-by-step explanation:

hope this helps!

8 0
2 years ago
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