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8_murik_8 [283]
3 years ago
15

Help plz due in a hour

Mathematics
1 answer:
melamori03 [73]3 years ago
4 0
I hope this is helpful

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A survey of 1 comma 558 randomly selected adults showed that 522 of them have heard of a new electronic reader. The accompanying
sineoko [7]

Answer with explanation:

Let  p be the proportion of adults have heard of the new electronic reader.

Given claim : The accompanying technology display results from a test of the claim that 38​% of adults have heard of the new electronic reader.

i.e. p=0.38

Then , the set of hypothesis will be :-

H_0: p=0.38\\\\H_a:p\neq0.38

Since, the alternative hypothesis is two tailed , so the test is two-tailed test.

Also, it is given that the sample size : n=1558

Number of adults showed that they have heard of a new electronic reader=522

So the sample proportion for adults have heard of the new electronic reader : \hat{p}=\dfrac{522}{1558}\approx0.34



The test statistic for proportion is given by :-

z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}\\\\\\\Rightarrow\ z=\dfrac{0.34-0.38}{\sqrt{\dfrac{0.38(1-0.38)}{1558}}}\\\\\\\Rightarrow\ z=-3.25279036541\approx-3.25

By using standard normal distribution table , the P-value for two tailed test corresponds to the obtained z-value ==0.0011541

6 0
3 years ago
What is 5/4 of a right angle
natka813 [3]
A right angle is 90 degrees
So you 90/4=22.5
Then 90+22.5=112.5
Hope this helped!
6 0
3 years ago
Worth 5 points plz help
JulijaS [17]

Answer:

<u>2</u>

15

Step-by-step explanation:

<u>16</u> /4=4/2=2

120/4=30/2=15

6 0
3 years ago
Which expression will simplify to 1? Assume m ≠ 9 and m ≠ -9.
nignag [31]

Answer:

B(m+9/m-9) (m-9/m+9)

7 0
3 years ago
Read 2 more answers
What is angle DCE?<br><br> A. 34<br> B. 85<br> C. 102<br> D. 98
s2008m [1.1K]
The red line is 180 degrees. So the arcs on top of the circle all equal up to 180 degrees. the number 72 doesn't really matter cause you're trying to find out the angle of DCE which is on the other side of the circle. So you gotta find the arc length of DE which is 68 because 180-112=68. So to find the angle, you have to divide the opposite arc length by two, which is 34. 

ANSWER: A. 34. you're welcomee!!

8 0
3 years ago
Read 2 more answers
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