Matilda asked 20 random people in the street if they would like to discuss what they want to do during the summer break. seven of them said yes.

how is this sample biased?

she should have asked more people.

the people who chose to participate might not be similar to the people who didn’t.

she should have asked girls only.

She should have asked more people.

Step-by-step explanation:

Given: Matilda asked 20 random people in the street if they would like to discuss what they want to do during the summer break.

Here sample size=20

We can see the sample is biased because the sample size is too small.

Through them we cannot decide the answer of the population.

She should have asked more people in the street if they would like to discuss what they want to do during the summer break. Then she need to make a list of their answers in approach to the answer.

step-by-step explanation:

a.   since the profit made in 2012 is equal to the profit made in 2014, the profit is           symmetric about the line y = 120,000.

step-by-step explanation:

given that megan owns a clothing boutique.

the profits of 2010, 11, are recorded and shown as follows:

years since     2010 0     1     2     3       4       5

profits made in 1000's   39       84     111     120   111     84

we find that profit gradually increases form 2010 to 2013 upto 120,   then starts decreasing.

the profits for 2012 and 2014 are the same while that of 2011 and 2015 are also the same.

this shows that there is symmetry about the line profit = 120000

hence answer is:

a.   since the profit made in 2012 is equal to the profit made in 2014, the profit is           symmetric about the line y = 120,000.

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step-by-step explanation: