17. n= loo is drawn from a stabilical population of U ( with a standard The sample meath is ford to ke X = 50. The sample for us to use the realized sample mean pop- lotion mean to 7 unit with 90/ confidence is : A. 42 1 43 . note 28. what is the effect of the changes on the width of m confidence interval i decreate in the confidence internal . 25 29 . Ah Increase tu standard pupuleziem deviation : 30 . 3 / 29