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12)50 students took a quiz with five questions. The frequency table below shows the results of the quiz. Use the frequency table to answer the following questions. ValueFrequencyRelative FrequencyCumulative Frequency040.084180.1612260.1218320.04204150.3355150.350a)How many students answered exactly 3 questions correctly?Number of students answered exactly three questions = 2b)How many students answered less than 3 questions correctly?c)What proportion (percent) of students answered exactly 4 questions correctly?

1250 Students Took A Quiz With Five Questions The Frequency Table Below Shows The Results Of The Quiz Use The Frequency Table To Answer The Following Questions class=

Sagot :

Explanation

From the table, we have:

• The first column (Value),: indicates the # of correct answers,

,

• The second column (Frequency),: indicates the # of students that answer the # of correct answers to the left in the table,

,

• The third column (Relative Frequency),: indicates the proportion of the # of students to the total,

,

• The fourth column (Cumulative Frequency),: gives the sum of the previous frequencies up to that row.

Using these data, we answer the questions:

a) Looking at the column Frequency for Value = 3, we find that 2 students answered exactly 3 answers correct.

b) Looking at the column Cumulative Frequency for Value = 2 (the previous value to 3), we find that 18 students answered less than 3 questions correctly.

c) Looking at the column Relative Frequency for Value = 4, we find that 0.3 = 0.3 * 100% = 30% of the students answered exactly 4 questions correctly.

Answer

a) 2

b) 18

c) 30%

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