There is a study that shows that young adults watch a MEAN.P of 6.50 hours of youtube.com | |||||||||
videos each day with a STDEV.P of 2.50 hours. | |||||||||
Suppose a sample of 36 young adults were chosen, what is the probability (percentage) | |||||||||
that these students watch between 5.50 hours and 5.75 hours of youtube.com videos each day? |
Solution :
= / n = 2.50 / 36 = 0.4167
= P[(5.50 - 6.50) / 0.4167 < ( - ) / < (5.75 - 6.50) / 0.4167)]
= P(-2.40 < Z < -1.80)
= P(Z < -1.80) - P(Z < -2.40)
= 0.0359 - 0.0082
= 0.0277
Probability = 0.0277
Get Answers For Free
Most questions answered within 1 hours.