Asking again for the third time here with all mixed answersA

Asking again for the third time here, with all mixed answers...Asking again on here for the third time with all mixed answers...Answer completely, means say which charts go where, there are 2 sets of answers to this on this site which are incorrect, and then one is incomplete because it is a different question and does not explain any answer given... For each of the types of data described below, would you present individual data values or grouped data when creating a frequency distribution and explain why? Then, state which visual display(s) of data would be most appropriate to use. Be sure to explain your answer clearly. a. Eye color observed for 87 people b. Minutes used on a cell phone by 240 teenagers c. Time to complete the Boston Marathon for the nearly 22,000 runners who participate d. Number of siblings for 64 college students Hint: A is not grouped, so if you copy the incorrect answers in here you will say it is, so it can only be the other choice...

Solution

The simplest way to decide whether to use grouped data or individual data is to understand whether the values taken by the variable are continuous or discrete.

a)

Colour of the Eye of 87 people : It is a qualitative variable where the answers will be colours. So, you tabulate it individually and not in a group as we are dealing with discrete and distinct eye colours. A Bar-Graph can be used as a visual tool to analyze the data.

b)

Minutes used on a cell phone by 240 teenagers : The variable is time which can take all the possible values from 0 to infinty. Thus, it is a continuous variable. In such case, it is always wise to use data distributed or grouped into bins. A Histogram or a frequency polygon may be ideally suited for visually analyzing the data.

c)

Time to complete the Boston Marathon for the nearly 22,000 runners who participate : Again the variable is time. So the answer remains the same as in case of B.

d)

Number of siblings for 64 college students : Although this is a quantitative varaible, the values that this can take is a discrete number set.For e.g. nobody can have number of siblings = 2.5 or 1.4. The variable can only take non-negative distinct integer values. Since, it can only take distinct values, the answer is same as that of part A.

Hope this helps. Ask if you have any doubts.