Question

a study in psychological bulletin and review(lea, Thomas, lamkin, and bell, 2007) presented evidence that, 'people use facial prototyps when they encounter different names, 'Paticipants were given two faces and asked to identify which one was Tim and which was Bob. The researchers conjectured that students would choose Tim for the person on the left more than would be expected by random chance. Of the 70 students sampled, 56 students selected Tim for the left.

State the research question? what are the observational units? What is the variable of interest? define the parameters of interest? find numeric value of the statistic?

Answer 1

Research question:

Do people use facial prototyps most of the time when they encounter different names?

Observational units:

The 70 sampled students whose choice for Tim have been observed

Variable of interest:

Number of students who have selected Tim for the left one.

Parameter of intererest:

The proportion of students who chose Tim for the left one(,say)

Statistic:

In case of random chance

In case of given data estimate of p

=56/70=0.8