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28 January, 16:39

350 people visited a zoo the zoo has four types of tickets the manager wants a sample of size 30, stratified by ticket type. how man teenagers should be be in the sample

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  1. 28 January, 20:35
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    The number of teenagers in the stratified sample of equal proportion is 30 teenagers

    Step-by-step explanation:

    Whereby tickets are sold to only adults male and female and teenagers, boys and girls, we have the following groups

    Group 1: Female adult

    Group 2: Male adult

    Group 3: Teenage boys

    Group 4: Teenage girls

    In stratified sampling, the types of people that visit the zoo (which is the target population) are identified and the appropriate proportion of each of the identified types is determined such that the sample is representative of the population

    Where equal number of each group are observed to have visited the zoo, then, the appropriate sample size of the teenager is found as follows;

    Number of groups identified = 4

    Sample size = 30

    Appropriate proportion of each group = 1/4

    Number of teenage boys in the sample = 1/4*30 = 15

    Number of teenage girls in the sample = 1/4*30 = 15

    Total number of teenagers in the sample = 15 + 15 = 30 teenagers.
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