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3 years ago

What is the upper and lower quartile of this set of data? 15, 19, 20, 25, 31, 38, 41

Mathematics

2 answers:

morpeh [17]3 years ago

4 0

Answer:

Lower Quartile (Q1) = 19; Upper Quartile (Q3) = 38.

Step-by-step explanation:

To find the quartiles, we begin by finding the median (Q2). The median is the middle value; this is 25.

The median splits the data into half. The median of the lower half is 19; this is the lower quartile. The median of the upper half is 38; this is the upper quartile.

aev [14]3 years ago

3 0

Answer:

Upper quartile: 38
Lower quartile: 19

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Nataliya [291]

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a) $P=3(120-s)+200$

b) $215 \leq P \leq 290$

Step-by-step explanation:

For this case we can use a linear model to solve the problem.

s) Create an equation to express the increase on the price tickets and the number of seats sold

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And let P the price for the ticket. So after the increase in ticket price the expression for the increase is P-200.

We have an additional info, for each increase of $3 the number of setas decrease 1. And the equation that gives to us the price change in terms of the increase of price is:

$P-200=3(120-s)$

So then our linear equation is given by:

$P=3(120-s)+200$

b) Over a certain period, the number of seats sold for this flight ranged between 90 and 115. What was the corresponding range of ticket prices?

So for this case we just need to replace the limits into the linear equation and see what we got:

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3 years ago