[See] Identify the null and alternative hypothesis: "High school teachers have incomes with a standard deviation less than
Question: Identify the null and alternative hypothesis: "High school teachers have incomes with a standard deviation less than $20,000
Deliverable: Word Document 
![[Solution Library] Find the critical z-values for](/images/solutions/MC-solution-library-36151.jpg "[Solution Library] Find the critical z-values for a two tailed test,")
[Solution Library] Find the critical z-values for a two tailed test,
(See Steps) Find the critical z-value for a left-tailed test, with
![[All Steps] The claim is that the](/images/solutions/MC-solution-library-36153.jpg "[All Steps] The claim is that the proportion of peas with yellow")
[All Steps] The claim is that the proportion of peas with yellow
![[All Steps] The test statistics in a](/images/solutions/MC-solution-library-36154.jpg "[All Steps] The test statistics in a left-tailed test is z = -2.")
[All Steps] The test statistics in a left-tailed test is z = -2.
(Solution Library) The test statistics in a two-tailed test is z =
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