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Natalija [7]
2 years ago
15

WILL GIVE BRAINLIESTTT

Mathematics
2 answers:
Alexeev081 [22]2 years ago
8 0
B ✋ 20 lettersssssssssssssssssssssssss
CaHeK987 [17]2 years ago
7 0

Answer:

B

Step-by-step explanation:

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A market researcher for a provider of music player accessories wants to know the proportion of customers who own cars to assess
AVprozaik [17]

Answer:

a) The estimated standard deviation of the sampling distribution of the​ proportion is 0.023

b) the estimated standard deviation have been if he had surveyed only 100 customers is 0.046

Step-by-step explanation:

given information:

the number of sample, n = 400

sample proportion, p = 70% = 0.7

a) standard deviation of a sample proportion is

σ = \sqrt{\frac{p(1-p)}{n}}

  = \sqrt{\frac{0.7 (1-0.7)}{400} }

  = 0.023

b) if n = 100, so

σ = \sqrt{\frac{p(1-p)}{n}}

  = \sqrt{\frac{0.7 (1-0.7)}{100} }

  = 0.046

7 0
2 years ago
The value of the circumference of circle A with a diameter of 27 cm is three times the value of the area of circle B. What is th
Leya [2.2K]
The answer is 3 cm.

Circle A's diameter is 27, right? However, circle A is 3 times the value of the area of B. Because of that, you need to do 27/3, the inverse, in order to get the diameter of circle B. 

Next, because radius is half of the diameter, you do 9 divided by 3 or 9 times 1/2.

7 0
2 years ago
If 3(m+2)-5=m+2, what is the value of m+2
Irina-Kira [14]

Answer:

m=.5

Step-by-step explanation:

4 0
3 years ago
Can you tell me which one plz ?
Andreas93 [3]
Just saying you have a 25% chance of getting it right if you guess
7 0
3 years ago
What is the value of ln e^4
sineoko [7]

Answer:

\large\boxed{\ln e^4=4}

Step-by-step explanation:

Use\\\\\log_ab^n=n\log_ab\\\\\log_aa=1\\\\\ln a=\log_e a\to\ln e=1\\====================================\\\\\ln e^4=4\ln e=4(1)=4

3 0
2 years ago
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