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NISA [10]
3 years ago
11

There are 28 seats in the front row of a theater. Each successive row contains

Mathematics
2 answers:
Phoenix [80]3 years ago
8 0

Answer:

28+2*(24-1)= 74

kaheart [24]3 years ago
6 0

Answer: 74

Step-by-step explanation:

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8. You recorded the time in seconds it took for 8 participants to solve a puzzle. The times were: 15.2, 18.8, 19.3, 19.7, 20.2,
kirill115 [55]

Answer:

Xbar = 20.813

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5 - number summary :

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Standard deviation, s = 4.068

Step-by-step explanation:

Given the data:

X : 15.2, 18.8, 19.3, 19.7, 20.2, 21.8, 22.1, 29.4

Ordered data:

15.2, 18.8, 19.3, 19.7, 20.2, 21.8, 22.1, 29.4

The mean (xbar) :

Xbar = Σx / n ; n = sample size = 8

Xbar = 166.8 / 8 = 20.8125

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The median :

1/2 *(n+1)th term

1/2(9) = 4.5

(4 + 5)th term / 2

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The five number summary :

Minimum = 15.2

Lower quartile (Q1) = 1/4(9) = 2.25 ; (2nd + 3rd) term / 2

(18.8 + 19.3) / 2 = 19.05

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Upper quartile (Q3) :

3/4(9) = 6.75 = (6th + 7th) / 2

(21.8 + 22.1) / 2 = 21.95

Maximum = 29.4

The standard deviation, s = sqrt[(x - xbar)²/ (n-1)]

Using calculator ;

s = 4.068

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3 years ago
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Answer:

Step-by-step explanation:

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2 years ago
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