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Nadya [2.5K]
3 years ago
9

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.

Mathematics
1 answer:
guapka [62]3 years ago
4 0

the answer is attached below

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5(3x + 4) + 2x
Lesechka [4]

Answer:

1. x= - 20/13

2. 7x-21

Step-by-step explanation:

3 0
3 years ago
PLZ HELP ASAP!!!<br> I really don’t understand these problems hope you guys can help!
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Answer:

#6 is 1001

#8 is x=1312

Step-by-step explanation:

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8. 32*41=x

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5 0
3 years ago
A shop makes a profit of £2750 in March.
LiRa [457]

Answer:

15% increase

Step-by-step explanation:

2750... 10% of that is 275, add 275 to 2750 is 3025. 1% of 2750 is 27.50, you times that by 5, which is 137.50 and add that to 3025 giving you 3162.50, add the 10% with the 5% gives you 15%, that's the increase.

7 0
4 years ago
Ricardo was mixing blue paint and yellow paint in a ratio of 3:5 to make green paint. He wants to make 40 liters of green paint.
Ivanshal [37]

Answer:

15L:40L

Step-by-step explanation:

6 0
3 years ago
A student scored 66 points on his Psychology 101 midterm. If the average of his midterm and final must be between 78 and 90 incl
Paul [167]

Answer:

range of scores on final exam student get  B is 90 to 100

Step-by-step explanation:

given data

Psychology 101 score = 66

average of his midterm = between 78 and 90

maximum = 100 points

to find out

range of scores on final exam student get  B

solution

we consider here lowest marks need in final = x

so average at two marks should be

equation is  

average marks = 0.5 × ( mid term marks + final marks )      .................1

put here value

78 = 0.5 ×  ( 66 + x )

x = 90

and

90 = 0.5 ×  ( 66 + x )

x = 114

so range 90 to 114

but maximum marks is 100 so

range of scores on final exam student get  B is 90 to 100

3 0
4 years ago
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