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Gnesinka [82]
3 years ago
6

Help please answer questions below

Mathematics
1 answer:
djverab [1.8K]3 years ago
4 0
3/8 is0.375 so it would stay as 2 and 5/6 is 0.8333 so it rounds up to 9
So now do 2 times 9 = 18
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A magazine provided results from a poll of 500 adults who were asked to identify their favorite pie. Among the 500 ​respondents,
RoseWind [281]

Answer:

The statement that​ "the margin of error was given as \pm5 percentage​ points" means that the population proportion is estimated to be with a certain level of confidence, within the interval \hat{p} \pm 0.05 ; where \hat{p}[tex] is the sample's proportion. The correct answer is C. The statement indicates that the interval [tex]0.14\pm0.05 is likely to contain the true population percentage of people that prefer chocolate pie.

Step-by-step explanation:

The margin of error for proportions is given by the following formula:

z_{\alpha /2}\times\sqrt{\frac{\hat{p}\times(1-\hat{p})}{n}}

Where:

z_{\alpha /2} is the critical value that corresponds to the confidence level; the confidence level being 1-\alpha,

\hat{p} is the sample's proportion of successes,

n is the size of the sample.

In this exercise we have that \hat{p}=0.14 and that the margin of error is 0.05.

Therefore if we replace in the formula to calculate the confidence interval we get:

\hat{p}\pm 0.05=0.14\pm0.05=(0.09, 0.19)

Which means that the true population proportion is estimated to be, with a certain confidence level, within the interval (0.09, 0.19).

7 0
3 years ago
In the trepezium,a=7cm,b=10.4cm and h=6.7cm.work out the area of the trepezium.​
Nataly [62]

Answer:

58.29

Step-by-step explanation:

1/2 × (7+10.4) × 6.7

= 58.29

3 0
3 years ago
Membership in an art club is expected to grow by about 4% per month. Currently, there are 350 members in the club. In about how
igomit [66]
500=350(1+0.04/12)^12x
Solve for x
500/350=(1+0.04/12)^12x
X=(Log(500/350)/log(1+0.04/12))/12
X=9 months
6 0
3 years ago
Read 2 more answers
Which of the following angle pairs<br> are<br> NOT congruent?
Slav-nsk [51]

Answer:

<2 and <8

Step-by-step explanation:

8 0
3 years ago
Write an inequality and solve
salantis [7]

Answer:

n, the integer;

8+6n< -42

7 0
3 years ago
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