Statistics students believe that the mean score on a first statistics test is 65. The instructor thinks that the mean score is higher. She samples 10 statistics students and obtains the scores: Grades...

Statistics students believe that the mean score on a first statistics test is 65. The instructor thinks that the mean score is higher. She samples 10 statistics students and obtains the scores:

Test grades are believed to be normally distributed.


Use a significance level of 5%.

1. State the alternative hypothesis: HA:HA:
   
   
   

   
   
   • μ>65μ>65
   
   
   • μ≠65μ≠65
   
   
   • μ<><>
   
   

   
   Correct
   
   


2. State the mean of the sample: Correct


3. State the standard error of the sample means: Incorrect


4. State the test statistic: t=t=


5. State the p-value: