As part of a biology experiment Thabo caught and weighed 120 minnows. He used his calculator to find the mean and standard deviation of their weights. Mean 26.231g Standard deviation 4.023 g (i) Find the total weight, x, of Thabo's 120 minnows. Σ x² to find x² for 2*- (ii) Use the formula standard deviation = Thabo's minnows. Another member of the class, Sharon, did the same experiment with minnows caught from a different stream. Her results are summarised by: n = 80 x= 25.214 standard deviation = 3.841 Their teacher says they should combine their results into a single set but they have both thrown away their measurements

As part of a biology experiment Thabo caught and weighed 120 minnows. He used his calculator to find the mean and standard deviation of their weights. Mean 26.231g Standard deviation 4.023 g (i) Find the total weight, x, of Thabo's 120 minnows. Σ x² to find x² for 2*- (ii) Use the formula standard deviation = Thabo's minnows. Another member of the class, Sharon, did the same experiment with minnows caught from a different stream. Her results are summarised by: n = 80 x= 25.214 standard deviation = 3.841 Their teacher says they should combine their results into a single set but they have both thrown away their measurements

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Description: 12 As part of a biology experiment Thabo caught and weighed 120 minnows. Heused his calculator to find the mean and standard deviation of their weights.Mean26.231gStandard deviation4.023 g(i) Find the total weight, x, of Thabo's 120 minnows.Σ- to fi

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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12 As part of a biology experiment Thabo caught and weighed 120 minnows. He
used his calculator to find the mean and standard deviation of their weights.
Mean
26.231g
Standard deviation
4.023 g
(i) Find the total weight, x, of Thabo's 120 minnows.
Σ
- to find Σ> for
(ii) Use the formula standard deviation =
Thabo's minnows.
Another member of the class, Sharon, did the same experiment with
minnows caught from a different stream. Her results are summarised by:
n= 80
x= 25.214 standard deviation = 3.841
Their teacher says they should combine their results into a single set but they
have both thrown
away
their measurements.
(iii) Find n, Ex and Ex² for the combined data set.
(iv) Find the mean and standard deviation for the combined data set.

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