Answer:
8 pieces of candy
Step-by-step explanation:
Take the original amount of candy in the bowl to be .
It says that 20 pieces of candy were added, therefore there are pieces of candy in the bowl.
Half of the candy is gone, therefore pieces of candy are left in the bowl.
After half of the candy is gone, there are 14 pieces left, so we can say that
Solve for :
Answer: 1.303639
Step-by-step explanation:
The t-score for a level of confidence is given by :_
, where df is the degree of freedom and
is the significance level.
Given : Level of significance :
Then , significance level :
Sample size :
Then , the degree of freedom for t-distribution:
Using the normal t-distribution table, we have
Thus, the t-score should be used to find the 80% confidence interval for the population mean =1.303639