Question

1. From the following confidence interval for µ1 - µ2: [-0.32, 0.86], the following can be concluded
Select one:
a) That there is no significant difference between the means of both populations
b)That both stockings are small
c)That µ2 is greater than µ1
d)That µ1 is greater than µ2

2. If a confidence interval is constructed at a confidence level of 99% instead of 95%
Select one:
a)Estimation precision decreases
b)The precision of the estimate is not altered
c)Estimation accuracy improves significantly
d)We can accurately calculate the value of the parameter of interest

Answer 1

1. Given,

confidence interval for µ1 - µ2: [-0.32, 0.86]

Since the confidence interval includes 0, so we can conclude that there is no significant difference between the means of both populations

ans-> a) That there is no significant difference between the means of both populations

2.If a confidence interval is constructed at a confidence level of 99% instead of 95%

ans-> c) Estimation accuracy improves significantly,

as level of confidence increased.