Apolling company finds that 60% of democrats give a ‘favorable’ rating for a senator and 52% of republicans give a ‘favorable’ rating for the same senator. what should the company use if they want to know if this is a ‘statistically significant’ finding?
a. independent two sample t-testb. two proportions z-testc. one sample t-testd. matched pairs t-test

a) Independent 2 sample t-test

Step-by-step explanation:

The main purpose of a t-test is to determine if there is a significant difference between the means of two groups. The company should use the independent 2 sample test, because this one tests whether the difference between the means of two independent populations is equal to a target value.

In this case, it will test the difference between the favorable ratings for a senator poll, comparing the opinnion of two independent groups, which are Democrats and Republicans.

14.3

step-by-step explanation:

add all the numbers together.

9 + 12 + 15 + 16 + 17 + 17 = 86

now, divide 86 by how many numbers we have: 6.

86 / 6 = 14.3