1.A sample of n=26n=26 data values randomly selected from a normally distributed population has variance s2=21.1s2=21.1.
Posted: Mon Jul 11, 2022 11:22 am
1.A sample of n=26n=26 data values randomly selectedfrom a normally distributed population hasvariance s2=21.1s2=21.1. Construct a 90% confidence intervalfor the population variance. Round your endpoints to one decimalplace.
2.A sample of n=19n=19 data values randomly selectedfrom a normally distributed population has standarddeviation s=2.7s=2.7. Construct a 90% confidence interval forthe population standard deviation. Round your endpoints to onedecimal place.
3.A sample of n=32n=32 data values randomly collectedfrom a normally distributed population has standarddeviation s=1.6s=1.6. We wish to test the nullhypothesis H0:σ=2H0:σ=2 against the alternativehypothesis H1:σ<2H1:σ<2 at a significanceof α=0.10α=0.10.
What is the value of the test statistic? Write your answerrounded to 3 decimal places.
What is the critical value? Write your answer rounded to 3decimal places.
Do we reject the null hypothesis?
2.A sample of n=19n=19 data values randomly selectedfrom a normally distributed population has standarddeviation s=2.7s=2.7. Construct a 90% confidence interval forthe population standard deviation. Round your endpoints to onedecimal place.
3.A sample of n=32n=32 data values randomly collectedfrom a normally distributed population has standarddeviation s=1.6s=1.6. We wish to test the nullhypothesis H0:σ=2H0:σ=2 against the alternativehypothesis H1:σ<2H1:σ<2 at a significanceof α=0.10α=0.10.
What is the value of the test statistic? Write your answerrounded to 3 decimal places.
What is the critical value? Write your answer rounded to 3decimal places.
Do we reject the null hypothesis?