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Alex
3 years ago
8

A test of abstract reasoning is given to a random sample of students before and after they completed a formal logic course. The

results are given below.
Before: 74, 83, 75, 88, 84, 63, 93, 84, 91, 77
After: 73, 77, 70, 77, 74, 67, 95, 83, 84, 75

Required:
a. Is there evidence to suggest the logic course improves abstract reasoning?
b. Construct a​ 95% confidence interval for the mean difference between the before and after scores.
Mathematics
1 answer:
alexandr402 [8]3 years ago
6 0

Answer:

don't know

Step-by-step explanation:

sorry buddy

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Kelly can tune 4 cars in 3 hours. If we assume he works at a constant rate, we can describe the situation using a
baherus [9]

Answer:

Rate = (4C)cars/3(H)hrs

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6 0
2 years ago
Please help asap!! I will mark you as brainliest :)
maria [59]

Answer:

280

Step-by-step explanation:

because 350÷1.25 is 280

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You have $47 to spend on music and movie downloads Each album download costs $7 and each movie download costs $8. Write and grap
mel-nik [20]

Answer:each album costs $7 and you buy x of them

cost of albums = 7x

each movie costs $8 and you have you have y of them

cost of movies = 8y

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sketch the graph of 7x + 8y = 47 , a straight line, and shade in the region below that line. Of course you would stay in the first quadrant, (x > 0, and y >0 , since you can't have negative number of movies and albums)

Since you can't buy partial albums and movies, both x and y have to be whole numbers.

So for solutions you would consider only ordered pairs that have whole numbers as their components.

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Step-by-step explanation: Hope this helps :)

8 0
2 years ago
Help pls 40 points with review 3
Marianna [84]

Answer:

Rectangle A is not a scale drawing.

Rectangle B is a scale drawing.

Step-by-step explanation:

A scale drawing involves ratios.

Rectangle A:

10cm is double the original 5cm giving us a 1 : 2 ratio.

However, 25cm is <em>not</em> double the original 20cm. This means that this rectangle is not to scale of the given rectangle.

Rectangle B:

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~Hope this Helps!~

6 0
3 years ago
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