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olga2289
1 month ago
14

A local amusement park has 30 rides that park visitors can go on. The following table shows the relative frequency distribution

for the number of rides that a park visitor will typically go on during one day at the park. The table also shows the deviation, or difference, from 21, the mean of the distribution. Number of rides and attractions 10 15 20 25 30 Deviation −11 −6 −1 4 9 Relative frequency 0.1 0.2 0.2 0.4 0.1 Which of the following is closest to the standard deviation of the distribution? 5.83 5.83 A 7.07 7.07 B 7.90 7.90 C 20 20 D 34
Mathematics
2 answers:
PIT_PIT [12.4K]1 month ago
5 0

Answer:

5.83

Step-by-step explanation:

To determine the mean:

10(0.1) + 15(0.2) + 20(0.2) + 25(0.4) + 30(0.1)

u = 21

To find the standard deviation:

\sqrt{(10 -21)x^{2} (.1) + (15 -21)x^{2} (.2)+(20-21)x^{2} (.2)+(25-21)x^{2} (.4)+(30-21)x^{2} (.1)}= 5.83

babunello [11.8K]1 month ago
3 0

Answer:

5.83

Step-by-step explanation:

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