Help with a and b Each student in a class of 70 was randomly assigned one line o

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Help with a and b

Each student in a class of 70 was randomly assigned one line of a random number table. Each student then counted the odd-numbered digits in a 28-digit line. The even digits are 0, 2, 4, 6 and 8 a. On average, in the list of 28 digits, how many odd-numbered digits would each student find? b. If each student found a 90% confidence interval for the percentage of odd-numbered digits in the entire random number table, how many intervals (out of 70) would you expect not to capture the population percentage of 50%? a. On average each student would find odd-numbered digits. Next Question

Explanation / Answer

a)

probability of finding odd digit = 0.5

number of odd numbered digits = 28 * 0.5 = 14

c)

number of intervals expect not to capture = total intervals * (1-b)

= 70 * (1-90%)

= 70 * 0.1

= 7

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