Question

This : 1 pt The by firms because this helps to determine advertising pricing for commercials Complete parts (a) through id) spent O A. The variable "weekly time spent watching television" is ly symmetric, but not normally distributed О B. The variable-weekly tine spent watching televiion-is lkely skewed left, not normaly distritted ° C. The variable-weekly time spent watching television" is likely skewed right not romly dvibted O D. Ο E. The variable weekly time spent watching television" iiely normaly dnbuted The variable weekly time spent watching tolevision" is kely uniform, not normally dstibued spend 2 25 hours per day watching television on a weekday Amme fu' he standard de lation for ne spent wat hing tele hien on awed dr-19,honrarin s adults is obtained, descrbe the sampling distribution of i the mean amount of time spent watching televsion ona (c) Determine the probability that a random sample of 40 aduts results in a mean time waiching television on a weekday of betwreen 2 and 3 hours The probability Round to four decimal places as needed) hours watching television on a weekday Detemine the kolhood of obtaining a sample mean of 179 hours or less om a papulation whose mean is presumed to be 2 25 hours 10 2019 O Type here to The probability is(Round to four decimal places as needed) (d) One consequence of the popudarity of the Intemet is that it is thought to reduce selevision watching Suppose tht a raof 3 1.79 hours watching televinion on a weekday Determine the lkelihood of obtaining a sample mean of 1.79 hours or less fom a population whose mean is presmed to be 225 heurs The Wolhood isRound to four decimal places as neaded ) Interpret this Select the correct choice below and til in the answer bax within your choice Round to the nearest integer as needed ) ar samples of size n-35 ndividuals trom a population whosa moan o acsumed to be 2 25 hors is cbtained, we would tlmean of 1 samle nea of adty 179 eopect asle n of 7 bof b af the camples of size n-35 indviduals from a popualation whose mean is assumed to ba 2 25 hours is isined we woold epect OC. "1000 dnerent tandom samples of size n . 35individuals tom a population whose mean b awan ed to be 225houriobahod- Based on the result obtained, do you think avid Interset users watch less television? O Yes O No Type here to search

Answer 1

a)
option C) is correct
skewed right,

b)
Xbar is approximately normal
mean = 2.25
sd(Xbar )= sd/sqrt(n) = 1.93/sqrt(40) = 0.30516

c)
P( 2 < xbar < 3)
=0.7867

d)
P(Xbar < 1.79)
= P(Z <(1.79 - 2.25)/((1.93/sqrt(35))
= P(Z < -1.41005 )
= 0.07930