Final answer:
The sample interval to check for weight and number of almonds is 20.
Therefore, the correct answer is: option c) 20
Step-by-step explanation:
The sample interval (k) can be calculated by dividing the population size (N) by the sample size (n).
In this case, N is the total number of bars made in an hour, which is 10,000, and n is the desired sample size, which is 500.
Therefore, the formula to calculate the sample interval is:
k = N / n
Plugging in the values, we get:
k = 10,000 / 500
= 20
So, the sample interval (k) is 20.