A scuba instructor wants to know the opinions of scuba divers about online scuba diving tests. She obtains a list of 900 scuba divers who have completed an online scuba diving course recently and e-mails a questionnaire to a randomly selected group of 175 of these divers. Only 54 of the questionnaires are returned. Identify the population and the sample in this study. (4 points)

The population is 175 and the sample is 54.

The population is 900 and the sample is 175.

The population is 900 and the sample is 54.

The population is 54 and the sample is 900.

The population is 175 and the sample is 900.

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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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step-by-step explanation:

step-by-step explanation:   divide the numerator by the denominator to get the decimal

it would still be 193

if divide by 100 then 1.93

i am not sure