In the sample survey of 54 discount brokers that showed that the mean price charged for a trade of 100 shares at $50 per share was $33.77 (aaii journal, february 2006). the survey is conducted annually. with the historical data available, assume a known population standard deviation of $15. what the 95% confidence interval estimate of the population mean?

a. ucl = 52.94 lcl = 47.06

b. ucl = 36.71 lcl = 30.83

c. ucl = 50.54 lcl = 49.46

d. ucl = $37.77 lcl = $29.77

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.

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:

a long term investor

step-by-step explanation:

because he is a long term investor

he is going to fill two shelves and the third shelf will only have five video games