Name for ID imor takes an average of 8 hours with a standard deviation of 2.5 ho

Question

Name for ID imor takes an average of 8 hours with a standard deviation of 2.5 hours to get spresd across the whole Question& (a ) (RUMORS FLY wmHOUT w.INGS) Assume th it isme dut. campas among the shadents and follows normal distribution. At 5:00pm, while going to home, she wonders what proportion of students will know her due to the rumor? One day at 2:00pm, Amy made a rumor outside the library with a group of girl students Hint: Use Z-Table. (b) (MEASURES OF CENTER) The sample mean of two numbers is DGC and the sample variance of the two numbers is -(DGO.. Find the two numbers Amy doing math

Explanation / Answer

We have given average = 8 and standard deviation = 2.5 .

Amy went out side at 2 pm and go return at 5 pm that is she made take 3 hours .

So we have to find P (x < 3 ) =   ( x - mean ) / standard deviation = ( 3 - 8 )/ 2.5 = -2

Using Z score table probability according to -2 = 0.02275

So 2.275 % students will know .

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