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3 years ago

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1. There are 25 students who started computer programming in elementary school and 25 students who started computer programming

in middle school. The first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%.
The line plot shows the differences after 10 rerandomizations. Determine whether the difference in the means of the two groups is significant based on the line plot. Explain your answer.

1 answer:

mart [117]3 years ago

6 0

Answer:

The difference in the means of the two groups is significant based on the line plot.

Step-by-step explanation:

Given that n1 = 25 and n2 =25 which are the students who started computer programming in elementary and middle school respectively.

Let x bar represent average for elementary and y bar for middle school.

H0: x bar = y bar

Ha: x bar not equals y bar

(Two tailed test)

The line plot gives the differences of sample size 10

Let d = difference = |x bar-y bar|

Then

Total

d 1 2 3 4

Freq 1 2 4 3 10

d*f 1 4 12 12 29

d^2 *f 1 8 36 48 93

Mean d 2.9

Var d 0.89

Std dev d 0.943398113

Std error d 0.314466038

Test statistic 9.221981556

df 9

p <0.0001

Since p < 0.05, at 95% level we conclude that there is a significant difference between the two means.

The line plot shows the differences

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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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3 years ago

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so we have:

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Step-by-step explanation:

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denis23 [38]

Answer:

The Proof is given below.

Step-by-step explanation:

Given:

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∠ONE ≅ ∠TEN

To Prove:

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Proof:

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Exterior Angle Property of a Triangle states that measure of exterior angle of a triangle is equals to the sum of measures of its interior opposite angles.

STATEMENT REASON

1. So In ΔONE,

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