Question

I'll give brainiest to whoever answers these correctly

1)The two-way table shows the results of a survey where students were asked if they were currently in elementary or middle school and if they owned a smartphone.



Of the middle school students, what is the relative frequency of those who own a smartphone? (round to the nearest percent)

2)Which of the following can you conclude from the two-way table?


A) Middle school and elementary school students are equally likely to own a smartphone.


B) An elementary school student is more likely to own a smartphone than a middle school student.


C) A middle school student is more likely to own a smartphone than an elementary school student.


D)There is no association between the student's school and owning a smartphone.

Answer 1

1)The relative frequency of those who own a smartphone will be 45%.

2)A middle school student is more likely to own a smartphone than an elementary school student. Option C is correct.

What is the formula for calculating the joint relative frequency?

Assume you need to compute the joint relative frequency of a certain category inside a larger category.

Then there's the proportion of that specific category's frequency to the total frequency of that large category.

Given data;

The total number of persons polled:

⇒216 (26 + 84 + 72 + 34)

⇒216

The number of persons who own a smartphone is calculated as follows:

⇒26 + 72

⇒98

The relative  frequency of those who own a smartphone is calculated as;

$\rightarrow\frac{98}{216} \times 100 \\\\ \rightarrow45 \%$

Hence,the relative frequency of those who own a smartphone will be 45%

2)A middle school student is more likely to own a smartphone than an elementary school student. Because the total of the middle school is more than the elementary school.

Hence,option C is correct.

To learn more about the relative frequency refer:

https://brainly.com/question/12165221

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