A team of ecological researchers went to a desert in southern Africa to study meerkats (a type of small mammal). The researchers want to check if the average weight of full-grown meerkats is less than 2 pounds (lbs). They decide to run a hypothesis test to help answer their question. After measuring the weights of a random sample of meerkats and inputting the data into JMP, they get the output shown in the tables below.
The null and alternative hypotheses for this problem are:
Using the JMP output information, provide the correct answer in the dropdown boxes for the questions below.
- The size of the sample used is: 121
- The test statistic (reported to two decimal places) is: 3
- Give the p-value with the corresponding conclusion: the p-value is 0.99875, implying little or no
- statistical evidence that the true mean weight of meerkats is the value 2 pounds.
- If our alternative hypothesis changes to
, then the corresponding p-value will be 0.00125.
Output information
Summary Statistics
- Mean: 2.09
- Std Dev: 0.33
- DF: 120
Test Statistic
- prob > |t| : 0.0025
- prob > t :
- prob < t :