WILL GIVE BRAINLIESTTT

Mathematics

2 answers:

Alexeev081 [22]3 years ago

8 0

B ✋ 20 lettersssssssssssssssssssssssss

CaHeK987 [17]3 years ago

7 0

Answer:

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

3 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