The frequency table shows the students' scores on a recent math test.what percentage of the students scored at least 81 on the t
2 answers:
Answer:
Step-by-step explanation:
Given is a frequency table showing the students' scores on a recent math test.
Score Frequency
41-50 1
51-60 2
61-70 8
71-80 12
81-90 20
91-100 7
We have to find the percentage of the students scored at least 81
on the test
From the frequency table we find that 20 students gained 81 to 90 and 7 students from 91 to 100
No of studence who scored atleast 80
Total frequency =
Hence percentage of the students scored at least 81
on the test=
Answer is
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Solution: The formula for mean is:
Where:
is the sum of given observations
is the number of observations
rounded to two decimal places
To find the median, we need to first arrange the data in ascending order but we are already given the data in ascending order.
Therefore, the median is:
Therefore, the median = 1.53