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Novay_Z [31]
3 years ago
14

Help me plseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

Mathematics
1 answer:
DanielleElmas [232]3 years ago
8 0

Answer:    

Step-by-step explanation:

uhh

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In a recent study, your town's chamber of commerce found that 73% of town residents believed that local businesses overcharged f
Dominik [7]

The Confidence interval for 95% who believes that the local businesses overcharge = (0.7026, 0.7574)

<h3>What is meant by confidence interval?</h3>

The range of values we see in our sample and hope to identify the value that most closely represents the population are referred to as a confidence interval.

<h3>According to the given information:</h3>

Sample size n = 1000

73% of town residents believed that local businesses overcharged for their products over 1000 resident.

= (1000/100) x 73

= 730

Sample proportion p = 730/1000

                                    = .73

q = 1-p = 0.23

Std error of proportion = √(pq/n)

                                      = √((.73*0.27)/1000)

                                      = 0.0140

95% Z critical value = 1.96

Margin of error = 1.96*0.0140

                          = 0.0274

Confidence interval = sample proportion ±margin of error

(0.7026, 0.7574)

To know more About Confidence interval visit:

brainly.com/question/14018374

#SPJ4

4 0
2 years ago
Why is -a² is always negative (a ≠ 0) and why is (-a)² is always positive?
hjlf
-a^2=(-1)\cdot a\cdot a

Regardless of the sign of a, we have a\cdot a=a^2\ge0 (never negative). But multiplying by -1 makes it negative.

On the other hand,

(-a)^2=((-1)\cdot a)^2=(-1)^2\cdot a^2=1\cdot a^2=a^2

which can never be negative for real a.
6 0
3 years ago
(3x – 70) (3y+40) 120 x
enyata [817]

Answer:

3x-70

Step-by-step explanation:

(3y+40 ) 120x is the answer of that question answer

4 0
3 years ago
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Which of the following are identities? Check all that apply.
gulaghasi [49]

Answer:

A B and C

Step-by-step explanation:

Hopefully this helps

6 0
3 years ago
Is the following relation a function?
mel-nik [20]

Answer:

no

Step-by-step explanation:

the x value (-1) repeats therefore it ain't a function

6 0
2 years ago
Read 2 more answers
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