An educator claims that the average salary of substitute teachers in the school districts in his county is less than $90 per day. A random sample of 8 schools districts is selected and the daily salaries are shown below. What is the critical value(s) for this hypothesis test?                $90  $86  $90  $85  $100  $85  $90  $85  -1.895 -1.860 -2.365 -1.645 -1.96

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