Answer: 196
Step-by-step explanation:
As per given , we have
Population standard deviation:
Significance level :
Using the z-value table , the critical z value for 98% confidence :
Margin of error : E= 01 lb
Sample size :
Simplify , we get
Hence, the minimum sample size required for books = 196
Answer:
We can not solve for a unique cost for each soldier.
Step-by-step explanation:
Let x be the daily cost for legionaries and y be the daily cost for archers.
Upon using our given information we will get a system of linear equations as:
Now we will solve for x from our 2nd equation,
Now we will substitute this value in our 1st equation.
We can see that -3y cancels out with 3y and 9 is not equal to 10. So this is an unsolvable system. Therefore, we can not find a unique cost for each soldier.