4.08 Quiz: Multiple Samples from a Population
A book store owner randomly samples 100 customers on two separate days to see what their favorite type of book is. The data shows the results of the two samples. Mystery Sports History Total Day 1 38 27 35 100 Day 2 42 24 34 100 The book store owner expects 850 customers. Based on the samples, about how many mystery books will the bookstore sell? Make your answer rounded to the nearest whole number.
340
This table shows the results of four surveys that randomly sampled 30 teenagers about their favorite night to hang out with friends. Friday Saturday Sunday Total Survey 1 9 14 7 30 Survey 2 11 13 6 30 Survey 3 10 14 6 30 Survey 4 7 5 18 30 According to the unbiased surveys in this table, what percent of the teenagers are likely to prefer hanging out with their friends on Saturday night?
46%
A sporting goods store randomly sampled three groups of 100 customers on what their favorite spectator sport is. The data shows the results of the three samples. Baseball Basketball Football Total Group 1 27 28 45 100 Group 2 26 28 46 100 Group 3 30 26 44 100 The sporting goods store has 1225 customers one weekend. Based on the samples, what is a reasonable estimate of the number of people who will prefer to watch football? Make your answer rounded to the nearest whole number.
551 people
A museum surveyed three groups of 5 members to find out how many times the members visited the museum in the past year. This table shows the results of the three samples. Survey Visits to the Museum Group 1 {4, 10, 6, 3, 8} Group 2 {3, 1, 2, 1, 2} Group 3 {7, 9, 3, 4, 7} Identify any surveys that are likely biased. Based on the unbiased surveys, estimate the mean number of visits per member in the past year. Round to the nearest whole number.
6 visits
This table shows the results of two surveys that randomly sampled 100 kids about their favorite types of pizza. Pepperoni Cheese Supreme Total Survey 1 59 21 20 100 Survey 2 54 30 16 100 Which statement can be made about kids' favorite types of pizza based on the information in the surveys?
More kids prefer pepperoni pizzas than other types of pizza.
