From a list of all passengers onboard at the time of the col

From a list of all passengers onboard at the time of the collision, groups were formed with ten names in each group. Then three of these groups were were selected using simple random sampling without replacement. The thirty passengers from the three selected groups are in the table below. Cells with an * indicate that this information is not known

A) What are the observiations in the dataset?

B) What sampling method what used to obtain this sample? (stratified, cluster, simple random sample with or without replacement, multistage, or systematic?)

C) What type of variable is LAST NAME?

D) Which of the follwing errors or biases may be present in the dataset?

--Sampling error-- Under coverage -- Selection bias -- Non-response bias -- Measurement error?

9 AGE LASTNAME FIRSTNAME Bucknell 1 2 Crosby heim Beniamin Female Corbett 9 Norman Padron-Manent Julian 2 2 Constance Williams Queenstown Queenstown 3 Devaney

Solution

A) What are the observiations in the dataset?

Sol) The observations are last name, first name, gender,age, class, boarded,Status.

B)What sampling method what used to obtain this sample?

Sol) we may use systematic or Stratified sampling.

C)\'What type of variable is LAST NAME?

Sol) It is Nominal variable

d) Which of the follwing errors or biases may be present in the dataset?

Sol) In the dataset we will have sampling and non sampling errors.