20 E A study looked at the running times of certain movies released in 2005, as shown to the right. The standard deviation of these running times is 17.5 minutes, and the quartiles are Q, = 99 minutes and Q3 = 120 minutes. 15 a) Describe the spread in running times based on i) the quartiles. ii) the standard deviation. b) Should there be any concerns about using either of these descriptions of spread? Explain. 10 65 90 115 140 165 Run Time (minutes) ----- a) Describe the spread in running times. i) The middle % of the movies ran between 99 and 120 minutes. No. of Films

20 E A study looked at the running times of certain movies released in 2005, as shown to the right. The standard deviation of these running times is 17.5 minutes, and the quartiles are Q, = 99 minutes and Q3 = 120 minutes. 15 a) Describe the spread in running times based on i) the quartiles. ii) the standard deviation. b) Should there be any concerns about using either of these descriptions of spread? Explain. 10 65 90 115 140 165 Run Time (minutes) ----- a) Describe the spread in running times. i) The middle % of the movies ran between 99 and 120 minutes. No. of Films

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Description: A study looked at the running times of certain movies released in 2005, as shown to the right. The standard deviation of these running times is 17.520 Eminutes, and the quartiles are Q, = 99 minutes and Q3 = 120 minutes.15a) Describe the spread in r

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Question

A study looked at the running times of certain movies released in 2005, as shown to the right. The standard deviation of these running times is 17.5
20 E
minutes, and the quartiles are Q, = 99 minutes and Q3 = 120 minutes.
15
a) Describe the spread in running times based on
i) the quartiles.
ii) the standard deviation.
b) Should there be any concerns about using either of these descriptions of spread? Explain.
10
65
90
115
140
165
Run Time (minutes)
----.
a) Describe the spread in running times.
i) The middle % of the movies ran between 99 and 120 minutes.
No. of Films

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