For a sample size of 55 and a population parameter of 0.2, what is the standard error of the sampling distribution? Round your answer to three decimal places.

A. 0.028
B. 0.054
C. 0.035
D. 0.043

B. 0.054

Step-by-step explanation:

A.P.E.X

idk this answer sorry cant on this one.

step-by-step explanation:

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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