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LUCKY_DIMON [66]
3 years ago
14

Need help on this question ASAP.

Mathematics
1 answer:
chubhunter [2.5K]3 years ago
8 0
I think its b that what it looks like to me
i hope this helps

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avanturin [10]
Bbbbbbbbbbbbbbbbbbbbbbbbbbb
3 0
3 years ago
Weinstein, McDermott, and Roediger report that students who were givne questions to be answered while studying new material had
emmainna [20.7K]
<h2>Answer with explanation:</h2>

Let \mu be the population mean.

By considering the given information , we have

Null hypothesis : H_0: \mu=73.4

Alternative hypothesis :  H_a: \mu>73.4

Since alternative hypothesis is right-tailed , so the test is a right-tailed test.

Given : Sample size : n=16 , which is a small sample , so we use t-test.

Sample mean: \overline{x}=78.3  ;

Standard deviation: s=8.4

Test statistic for population mean:

t=\dfrac{\overline{x}-\mu}{\dfrac{s}{\sqrt{n}}}

i.e. t=\dfrac{78.3-73.4}{\dfrac{8.4}{\sqrt{16}}}\approx2.333

Using the standard normal distribution table of t , we have

Critical value for \alpha=0.01 : t_{(n-1,\alpha)}=t_{(15,0.01)}=2.602

Since , the absolute value of t (2.333) is smaller than the critical value of t (2.602) , it means we do not have sufficient evidence to reject the null hypothesis.

Hence, we conclude that we do not have enough evidence to support the claim that answering questions while studying produce significantly higher exam scores.

3 0
3 years ago
Find the distance between the two points rounding to the nearest tenth (if necessary). (-7, -5)(-3, 4)
aleksklad [387]

Answer:

9.8 ( to the nearest tenth )

Step-by-step explanation:

calculate the distance using the distance formula

d = √( x₂ - x₁ )² + ( y₂ - y₁ )²

with (x₁, y₁ ) = (- 7, - 5) and (x₂, y₂ ) = (- 3, 4)

d = \sqrt{(-3+7)^2+(4+5)^2} = \sqrt{16+81} = \sqrt{97} = 9.8


4 0
3 years ago
Simplify the giving expression<br>(18/12 t-8)2<br>​
bekas [8.4K]

Answer:

3t - 16

Step-by-step explanation:

(18/12 t-8)*2

First simplify inside the parentheses

(3/2 t -8)*2

Then multiply

3/2t *2 -8*2

3t - 16

5 0
3 years ago
Read 2 more answers
Susan enlarged to scale a rectangle with a height of 4 cm and length of 11 cm on her computer. The length of the new rectangle i
Anvisha [2.4K]
The height is going to be 9.5
6 0
3 years ago
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