A newspaper reported that 25% of people say that coffee shops in Shanghai are overpriced: Statistics and probability Assignment, Singapore

1. A newspaper reported that 25% of people say that coffee shops in Shanghai are overpriced. The source of this information was a telephone survey of 200 adults.

(1) Identify the sample.

A. 25% of adults B. 200 adults surveyed C. coffee shops D. adults

(2) Identify the variable of interest.

A. coffee price
B. proportion of adults who say that coffee shops in Shanghai are overpriced
C. coffee shops
D. whether a coffee shop in Shanghai is overpriced

(3) Identify the parameter of interest.

A. 𝜎, the population standard deviation of adults who say that some coffee shops are overpriced.
B. p, the population proportion of adults who say that some coffee shops are overpriced.
C. 𝑥̅, the sample means a number of adults who say that some coffee shops are overpriced.
D. 𝑝̂, the proportion of adults who say that some coffee shops are overpriced in a random sample of 200 adults

(4) Identify the statistic used to estimate the target parameter

A. 𝜎, the population standard deviation of adults who say that some coffee shops are overpriced.
B. p, the population proportion of adults who say that some coffee shops are overpriced.
C. 𝑥̅, the sample means a number of adults who say that some coffee shops are overpriced.
D. 𝑝̂, the proportion of adults who say that some coffee shops are overpriced in a random sample o 200 adults.