The following table shows the number of people that are either 18, 19, 20 or 21 years old, from a sample of 257 people. a) Complete the table. Age Number of people 18 65 19 53 20 76 21 (b Find the mean for this sample. Give your answer to at least 2 decimal places. (c Find the standard deviation for this sample. Give your answer to at least 2 decimal places.

The following table shows the number of people that are either 18, 19, 20 or 21 years old, from a sample of 257 people. a) Complete the table. Age Number of people 18 65 19 53 20 76 21 (b Find the mean for this sample. Give your answer to at least 2 decimal places. (c Find the standard deviation for this sample. Give your answer to at least 2 decimal places.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Concept explainers

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

Question

The following table shows the number of people that are either 18, 19, 20 or 21 years old, from a sample of 257 people.

a) Complete the table.

Age	Number of people
18	65
19	53
20	76
21

(b Find the mean for this sample. Give your answer to at least 2 decimal places.

(c Find the standard deviation for this sample. Give your answer to at least 2 decimal places.

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