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Romashka-Z-Leto [24]
3 years ago
11

An educator wants to determine whether a new curriculum significantly improves standardized test scores for fourth grade student

s. She randomly divides 90 fourth dash graders into two groups. Group 1 is taught using the new ​curriculum, while group 2 is taught using the traditional curriculum. At the end of the school​ year, both groups are given the standardized test and the mean scores are compared. Determine whether the sampling is dependent or independent. Indicate whether the response variable is qualitative or quantitative.
Mathematics
1 answer:
vesna_86 [32]3 years ago
5 0

Answer:

Independent Sampling

Step-by-step explanation:

There are two scenarios for independent sampling .

Testing the mean we get the differences between samples from each population. When both samples are randomly  inferences about the populations. can get.

Independent sampling are sample that are selected randomly. Observation does not depend upon value.Many analysis assume that sample are independent.

In this statement 90 dash are divides into two groups Group 1 and Group 2 . Both are standardized that mean both are randomly selected. Means are observed. Observation doesn't depend upon value.  So this style of sampling is independent Sample.

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3 years ago
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erma4kov [3.2K]

Answer:

Step-by-step explanation:

4) (-2,3)   ;  (-1,-2)

Slope = \frac{y_{2}-y_{1}}{x_{2}-x_{1}}\\\\=\frac{-2-3}{-1-[-2]}\\\\=\frac{-5}{-1+2}\\\\=\frac{-5}{1}\\\\=-5

5) line is parallel to x-axis. So, slope= 0

6) (1,1) ;  (-2, -1)

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6 0
3 years ago
Please help me?? Solve for x
Delvig [45]
X= 10

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Subtract 5 from both sides and get 8x=80

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3 0
2 years ago
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How many of the scores from the group that studied in question eight are in one mean absolute deviation of the mean? Which score
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Answer:

93

Step-by-step explanation:

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4 0
2 years ago
I’m having a lot of trouble, can someone guide me, step by step?
shutvik [7]

Answer:

Hi hopefully this helps you!

Step-by-step explanation:

To find the area of a circle you can use the formula A = πr^2

The radius of a circle is just the diameter divided by 2. In this case we know the diameter is 3, so the radius is 1.5

A = π(1.5)^2

   = 7.07

Because this is a semicircle, divide this area by 2

   = 3.53429 in^2

Add up the area of this semi circle with the area of the rectangle

A = (3.53429) + (3x4)

   = 15.53429 in^2

To find the circumference/ perimeter of a circle use this formula C = 2πR

C = 2π(1.5)

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Again because this is a semicircle, divide by 2

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To find the perimeter of this entire shape add up the circumference of the semicircle and the rectangle's sides and bottom

P = 4.71239 + 4 + 4 + 3

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So the final answer would be

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P = 15.71 inches

Hope this helps! Best of luck in your studies <3

6 0
3 years ago
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