11) The following ving contingency table provides a joint frequency distribution

Question

11) The following ving contingency table provides a joint frequency distribution for a group of tabl retired people by career and age at retirement. Age at Retirement 50-55 56-60 61-65 Over 65 Total 10 40 89420.418 Professor94478 40.297 Secretary 21 45 63 49 178 Store Clerk 18 44 70 50 182 Total 8177 173 718 Career College C3 Suppose one of these people is selected at random. Compute the probability that the perso selected was an attorney who retired between 61 and 65. A) 0.418 B) 0.297 C) 0.124 D) 0.252 5.1 Probability Distributins. Identify the given random variable as being discrete or continuous. 12) The braking time of a car A) Discrete B) Continuous 13) The number of phone calls between New York and California on Thanksgiving day A) Discrete B) Continuous 14) The number of passengers on a commercial airline flight. A) Discrete B) Continuous 15) The total weight of passengers on a commercial airline flight. A) Discrete B) Continuous

Explanation / Answer

(11)

P(Attorney & 61-65) = 89/718 = 0.124

So,

Correct option:

C) 0.124

(12) Correct option:
B) Continuous

REASON: time can take infinite number of possible values in an interval

(13) Correct option:

A) Discrete

REASON: Number of calls can take only integer values

(14) Correct option:

A) Discrete

REASON: Number of passengers can take only integer values

(15) Correct option:

B) Continuous

REASON: Weight can infinite number of possible values in an interval

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