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xeze [42]
3 years ago
8

The Trial Urban District Assessment (TUDA) is a government-sponsored study of student achievement in large urban school district

s. TUDA gives a mathematics test scored from 0 to 500. A score of 262 is a "basic" mathematics level and a score of 299 is "proficient." Scores for a random sample of 1 100 eighth-gr ders in Dallas had 271 with standard error 1.3.
(a) We don't have the 1100 individual scores, but use of the t procedures is surely safe. Why? O
A. Because the sample size is very large.
B. Because the sample doesn't have outliers.
C. Because the data haya strong skew.
D. Because use of the t procedures is always safe.
Mathematics
1 answer:
Bas_tet [7]3 years ago
4 0

Answer:

A. Because the sample size is very large.

Step-by-step explanation:

The sample is quite large, so the t test is safe. With a sample size of at least 100, this test is going to be safe.

So the correct answer is:

A. Because the sample size is very large.

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Step-by-step explanation:

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Solve for x in the equation X^2 - 8X + 41= 0
BaLLatris [955]

Answer:

The equation has two solutions for x:

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Step-by-step explanation:

Let's use the quadratic formula for solving for x in the equation:

X^2 - 8X + 41= 0

x² - 8x + 41 = 0

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Let's recall that √-1 = i

x = 8 +/- 10i/2

<u>x₁ = (8 + 10i)/2</u>

<u>x₂ = (8 - 10i)/2</u>

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