Question

determine whether the value 75% is a parameter or statistic:
in a random sample of 90 students who passed statistics, 75% used statistics in their future careers
parameter
statistic
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question 3
a political scientist surveys 32 of the current 123 representatives in a states congress.
what is the size of the sample:
what is the size of the population:
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question 4
determine if the quantity described below is a statistic or a parameter:
the proportion of female students that attended bmcc last year.
statistic
parameter

Explanation:

Question 2 (already answered but for clarity)

A statistic is a measure from a sample, while a parameter is from a population. Here, 75% is from a sample of 90 students, so it's a statistic.

Step1: Define sample size

The sample is the number of representatives surveyed, which is 32.

Step2: Define population size

The population is all current representatives, which is 123.

The proportion of female students who attended BMCC last year refers to all (the population of) BMCC students last year, so it's a parameter (a measure of the population).

Answer:

Statistic

Question 3