The data shows the number of grams of fat found in 9 different health bars 12, 14, 16, 17.5, 10, 18, 15, 15.5, 19
what is the iqr (interquartile range) for the data?

a: 4.75

b: 9

c: 15.5

d: 17.75

ANSWER

A: 4.75

EXPLANATION

The given date set is

12, 14, 16, 17.5, 10, 18, 15, 15.5, 19

We arrange the data set in ascending order to get,

{10,12,14,15,15.5,16,17.5,18,19}

The median is,

The first quartile is the median of the lower half of the ascending set.

{10,12,14,15}

The third quartile is the median of the upper half of the ascending set.

{15.5,17.5,18,19}

The inter- quartile range is

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.

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step-by-step explanation: