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Ber [7]
3 years ago
7

The city school district is considering increasing class size in the elementary schools. However, some members of the school boa

rd are concerned that larger classes may have a negative effect on student learning. In words, what would the null hypothesis say about the effect of class size on student learning?
Mathematics
1 answer:
Snezhnost [94]3 years ago
6 0

Answer:

The null hypothesis would say that class size has no effect on students learning.

Step-by-step explanation:

Null hypothesis is a type of hypothesis that is used in statistics which proposes that there is no difference between a certain characteristic of a population or the data - generating process.

Now, in this question,the school district is considering increasing class size in the elementary schools but we want to check whether larger classes may have a negative effect on students learning.

Thus, the null hypothesis would reject this claim of larger classes having negative effect on students and say that class size has no effect on students learning.

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MrMuchimi
<h3>The angles are:</h3>
  1. ∠ABC
  2. ∠CBE
  3. ∠DBE
  4. ∠ABD

Hope it helps

4 0
3 years ago
For what value(s) of x does y = 0 for the function tan(x)?
mina [271]
So We Know That tan(x) Equals

\tan(x)  =  \frac{ \sin(x) }{ \cos(x) }
We Can Use Logic, We Know That Anything That Makes The Denominator 0, Will Not Work, So We Need To Know What Makes Sin(x) equal to 0 and Cos(x) equal to 1 or -1 BUT NOT 0

\sin(0)  = 0 \:  \cos(0)  = 1 \\  \sin(180) = 0  \:  \cos(180) =  - 1   \\ \sin(360)  = 0 \:  \cos(360)  = 1 \\  \sin( - 180)  = 0 \:  \cos( - 180)   =  - 1 \\ \sin( - 360)  = 0 \:   \cos( - 360)  = 1
\cos(90)  = 0 \\  \cos( - 90)  = 0 \\  \cos(270)  = 0 \\  \cos( - 270)  = 0
We Didn't Want Cosine To equal Zero Because Then We Get

\tan(x)  =  \frac{ \sin(x) }{ \cos(x) }  \\  \tan(x)  =  \frac{ \sin(90) }{ \cos(90) }  \\  \tan(x)  =  \frac{1}{0}  \\  \tan(x) = indeterminate

THE ANSWER IS C : -360°,-180°,0°,180°,360°
8 0
3 years ago
What is the approximate circumference of a circle that has a diameter of 25 yards?<br><br> C =
nirvana33 [79]
The answer is C=78.54 yd


8 0
4 years ago
Read 2 more answers
How do you solve this equation 18÷6×(4-3)+6 ?
joja [24]

Answer:

PEMDAS

18÷6×(4-3)+6

3 * 1 + 6

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5 0
3 years ago
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In 1898, L. J. Bortkiewicz published a book entitled The Law of Small Numbers. He used data collected over 20 years to show that
maksim [4K]

Answer:

The answers are;

a. The probability of more than one death in a corps in a year is 0.12521.

b. The probability of no deaths in a corps over five years is 4.736 × 10⁻².

Step-by-step explanation:

For Poisson Distribution  we have

Pₓ(k) = \frac{(\lambda t)^k e^{-(\lambda t)} }{k!}

Where:

λ = Mean per unit time

k = Specified data point

t = time

e = Euler constant

a. The probability of more than one death in a corps in a year is given by

The mean of the Poisson distribution for one year is given as

λ·t = 0.61 × 1 = 0.61

Therefore by using complement principle, we have

P (X >1) = 1 - P(X = 0) - - P(X = 1)

=1- \frac{(0.61)^0 e^{-(0.61)} }{0!} -  \frac{(0.61)^1 e^{-(0.61)} }{1!}

= 1 - 0.543 - 0.3314

= 0.12521

b. Here we have t = 5

Therefore the mean = λ·t = 0.61×5 = 3.05

The probability of there being no deaths in a corps for over five years is

P (X =0) = \frac{(3.05)^0 e^{-(3.05)} }{0!} = 4.736 × 10⁻²

The probability is 4.736 × 10⁻² .

5 0
4 years ago
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