4. A simple random sample of the weight of 40 women has a mean of 146.22 lb. Research from other sources suggests that the population standard deviation of weight of women is
30.86 lb. Find a 95% confidence interval estimate of the mean weight of all women.
132.11 lb << 160,33 lb
141.58 lb << 150.86 lb
136.66 lb < p < 155.78 lb
138.19 lb

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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step-by-step explanation:

your answer is -9

step-by-step explanation:

the ordered pairs for the given function are of the form

i dont know