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pshichka [43]
3 years ago
9

Help me with this, pls

Mathematics
1 answer:
Rufina [12.5K]3 years ago
6 0
Don't forget to follow me!!!

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A USA Today/CNN/Gallup survey of 369 working parents found 200 who said they spend too little time with their children because o
KengaRu [80]

Answer: a. 0.542

b. 0.051

c. (0.491,\ 0.593)

Step-by-step explanation:

Let p be the population proportion of parents spend too little time with their children because of work commitments

As per given , we have

n= 369

\hat{p}=\dfrac{200}{369}=0.542005420054\approx0.542

Since the sample proportion is the best estimate for the population proportion.

So , the point estimate of the proportion of the population of working parents who feel they spend too little time with their children because of work commitments = 0.542

z-value for 95% confidence interval : z_{\alpha/2}=1.96

Margin of error : E=z_{\alpha/2}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}

E=(1.96)\sqrt{\dfrac{0.542(1-0.542)}{369}}\\\\=0.0508364564574\approx0.051

The margin of error = 0.051

Confidence interval : \hat{p}\pm E

0.542\pm0.051\\\\=(0.542-0.051,\ 0.542+0.051)\\\\=(0.491,\ 0.593)

95% confidence interval estimate of the population proportion of working parents who feel they spend too little time with their children because of work commitments : (0.491,\ 0.593)

6 0
4 years ago
Which shows 0.00234 written in scientific notation?
topjm [15]
It’s D


the reason why is because the multiplier must be between 1 and 10
(
1
≤
x
≤
10
)
so first more your decimal there which you get:
2.34
then just count how many numbers the decimal jumped, if the decimal moved left the exponent is positive and if it moved right, as in your number, the exponent is negative

yours moved 3
6 0
1 year ago
Using the side-splitter theorem, Daniel wrote a proportion for the segments formed by line segment DE. What is EC?
AfilCa [17]
We manipulate the given equation in order to solve for EC. We do this by cross multiplying. 
The resulting equation will be:
EC = (4 x 3)/5
EC = 12/5 = 2.4

Additionally, the side-splitter theorem works for this problem since DE and AC are parallel to each other, therefore splitting the remaining two sides into proportional segments.
7 0
3 years ago
Read 2 more answers
What is the value of a?​
Leno4ka [110]

Answer:

A=60

Step-by-step explanation:

Add 28+20+12

A=60

5 0
3 years ago
Read 2 more answers
HELP HELP REALLY NEED HELP
Ghella [55]
Volume of Rectangle =  (Area of Base)(Height)
Volume of Square Pyramid = (1/3) (Area of Base)(Height)

The prism is 3 times larger than the pyramid
Answer: C
7 0
4 years ago
Read 2 more answers
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