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### Course: Statistics and probability>Unit 4

Lesson 1: Percentiles

# Cumulative relative frequency graph problem

Nutritionists measured the sugar content (in grams) for $32$ drinks at a popular coffee shop. A cumulative relative frequency graph for these data is shown below.
problem 1
An iced coffee has $15$ grams of sugar.
Estimate the percentile of this drink to nearest whole percent.
${}^{\text{th}}$ percentile

problem 2
Estimate the median of the distribution of drinks.
Hint: Think about the ${50}^{\text{th}}$ percentile.
median $\approx$
grams

problem 3
What is the best estimate for the interquartile range (IQR) of the distribution of drinks?

## Want to join the conversation?

• Why does it have the same questions as the video?
• probably so we can work along with the video, or maybe so we can go back to the video if we have a question on how to solve the problem.
• why is the government taking my money?
• To build roads and bridges and buses
• definition of relative frequency
• relative frequency as this :
we have 10 glass of drinks , half of them has sugar and the other half doesnt have sugar. Now "what is the percentage of the drinks that don't have sugar? (5 drinks don't have sugar)/ (10 total of drinks) = .5
.5 is the relative frequency :)
relative means (relative to all drinks) frequency means (how many drinks have or havn't sugar)
in other words "relative to all drinks we have , what is the frequency (number of drinks) of sugar free drinks"
• where has cumulative frequency been discussed?
• there are dedicated sections in KA for this topic