Use the following information for questions:
A comparison is to be made between the proportion of second graders that cannot read at second grade level and the proportion of third graders that cannot read at second grade level. School records from schools across the state are collected and records for 123 second graders and 146 third graders are randomly selected. Of the sampled second graders, 25 seem to be not reading at second grade level. Of the sample third graders, 26 do not read at second grade level.
-What is the correct notation for the difference $\frac{25}{123} - \frac{26}{146}$ ?

Question

Use the following information for questions:
A comparison is to be made between the proportion of second graders that cannot read at second grade level and the proportion of third graders that cannot read at second grade level. School records from schools across the state are collected and records for 123 second graders and 146 third graders are randomly selected. Of the sampled second graders, 25 seem to be not reading at second grade level. Of the sample third graders, 26 do not read at second grade level.
-What is the correct notation for the difference

\frac{25}{123} - \frac{26}{146}

?

Quizplus · Accepted Answer

The correct notation for the difference in proportions is $ \hat{p_1} $ - $ \hat{p_2} $, where $ \hat{p_1} $ and $ \hat{p_2} $ represent the sample proportions of second and third graders not reading at second grade level, respectively.

Use the Following Information for Questions: a Comparison Is 25123−26146\frac{25}{123} - \frac{26}{146}12325​−14626​

Use the Following Information for Questions:
a Comparison Is $\frac{25}{123} - \frac{26}{146}$