Question

Based on the data shown below, which of the statements are true? Select all that apply.

Answer 1

We are asked to determine which of the statements are true.

Part A. More 8th graders used cell phones than 7th graders.

We notice from the table that 53 7th graders used cell phones and 59 8th graders used cell phones therefore, more 8th graders used cell phones than 7th graders, therefore, the statement is true.

Part B. 7th graders are more likely to use computers than cell phones.

The likelihood of using computers or cell phones is proportional to the number of items that were used. Since 7th graders used more cell phones than computers they are more likely to use cell phones. Therefore, the statement is false

Part C. More 8th graders used computers than 7th graders.

The number of 8th graders that used computers is 38 and the number of 7th graders that used computers is 21, therefore, more 8th graders used computers. The statement is true.

Part D. More 7th graders were surveyed than 8th graders.

To determine the number of 7th graders that were surveyed we need to add the number that used computers and the number that used cell phones, we get:

$N_7=53+21=74$

Now, we do the same for the 8th graders:

$N_8=59+38=97$

Therefore, more 8th graders were surveyed. Therefore, the statement is false.