The numbers of goals, x, scored by a team in each of its previous 25 games are

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The numbers of goals, x, scored by a team in each of its previous 25 games are summarised by the totals

Σ(x −1)² = 30 and Σ(x −1) = 12.

a. Find the mean number of goals that the team scored per game.

b. Find the value of x².

c. Find the value of a and of b in the following table, which shows the frequencies of the numbers of goals scored by the team.

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Cambridge International AS & A Level Mathematics Probability & Statistics 1 Coursebook

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Authors: Dean Chalmers, Julian Gilbey

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Question Posted: Sep 13, 2021 01:35 AM

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The numbers of goals, x, scored by a team in each of its previous 25 games are

Question:

No. goals 1 >3 No. games (f) 5 b 4 3.

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Sample mean x x n Sample variance s2 x x2 n 1 Sum of squares x 12 x2 2x n Where represents the sum o...View the full answer

Cambridge International AS & A Level Mathematics Probability & Statistics 1 Coursebook

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