Question
me you need to build a confidence interval for a population mean within some situation Nalurally, you must defarmine wh hould use either the distribution z-distribution given upon the information knownu in the on Thus, based or the or possibly even neither based which (r z-or neither) disliibution is upon the information p for each situation below, termine priate. Then if you can use either a or z- distribution, give the a critical value (critical f or z score) from mal distrib ch the given confidence a 99% confidence 75 a known population data beberved to be very skewed Appropriate distribution. Associated critical value d 95% confidence o known population data believed to be very skewrid Appropriate distributian Associafed critical value. c. 90% confidence unknown population data believed be skewed Appropriate distribution. Associated critical value 3 Problems Set Templates for Hypothesis Test
Explanation / Answer
a)appopriate distribution : Z distribution
=1-0.99 =0.01
/2 =0.005
critical value =2.576
b) appopriate distribution : Z distribution
=1-0.95 =0.05
/2 =0.025
critical value =1.960
c)
appopriate distribution : t distribution
=1-0.90 =0.1
/2 =0.05
df = n-1 =73-1 =72
critical value =1.6663
