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dezoksy [38]
3 years ago
8

A sample of 250 people resulted in a confidence interval estimate for the proportion of people who believe that the federal gove

rnment's proposed tax increase is justified is between 0.14 and 0.20. Based on this information, what was the confidence level used in this estimation?
Approximately 1.59
95 percent
Approximately 79 percent
Can't be determined without knowing
Mathematics
1 answer:
bagirrra123 [75]3 years ago
3 0

Answer: Approximately 79 Percent

Step-by-step explanation:

The confidence level used in this estimation is approximately 79 percent.

You might be interested in
Sarah answered 24 questions on her test correctly and earned an 80%. How many questions were on the test?
MaRussiya [10]

Answer:

43 questions in total

Step-by-step explanation:

the original equation with the unknown (total number of questions on the test) will look like this

\frac{total \: number \: of \: questions \: on \: exam}{24 \: answered \: questions}  = 80\%

we know this because to work out a percentage in the 1st place you need the total ÷ number (in this case it's ÷ how many questions out of the total she did answer)

now you rearrange.

you need to move the 24 to get the total on it's own here's how you do it

\frac{tot \: num \: of \: qs}{24}  \times 24 = 80\% \times 24

what you do to one side of equation you have to do to the other. the 24 and 24 on the left will cancel because 24÷24=1 and we don't write

got mum of Q's x 1= 80 x 24

now you convert % to decimal

80\% \times 100 = 0.80

replace

tot \: num \: qs \:  = 24 \times 0.80 = 19

now you take the original and + the 19

24 + 19 = 43

therefore there are a total of 43 questions on the exam

5 0
3 years ago
I need help pleaseee!!​
EastWind [94]

Answer:

y=-3

Step-by-step explanation:

slope is 0 so we know it is a straight line.

your y value is -3 so therefor is your answer

7 0
3 years ago
Which are the ones that are a function, and not a function
8_murik_8 [283]
Here is my answer, hope to help you
6 0
3 years ago
Which number means four hundred seven and six hundred fifty-two thousandths?
saw5 [17]
Which number means four hundred seven and six hundred fifty-two thousandths?

answer is

407.652
7 0
3 years ago
Suppose that a customer service center claims that the telephone calls it receives last 112 seconds on average, with a standard
adoni [48]

Answer:

95% Confidence interval:  (111.02,112.98)

Step-by-step explanation:

Average = 112 seconds

Standard Deviation = 9 seconds

n = 324

Confidence interval:

\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}

Putting the values, we get,

z_{critical}\text{ at}~\alpha_{0.05} = \pm 1.96

112 \pm 1.96(\frac{9}{\sqrt{324}} ) = 112 \pm 0.98 = (111.02,112.98)

5 0
3 years ago
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