11.) According to an avid aquarist, the average number of fish in a 20-gallon tank is...

11.) According to an avid aquarist, the average number of fish in a 20-gallon tank is 10, with a standard deviation of two. His friend, also an aquarist, does not believe that the standard deviation is two. She counts the number of fish in 15 other 20-gallon tanks. Based on the results that follow, do you think that the standard deviation is different from two? Data: 11; 10; 9; 10; 10; 11; 11; 10; 12; 9; 7; 9; 11; 10; 11

Degrees of freedom

test statistic

pvalue

accept or reject

Solutions

Expert Solution

Degrees of freedom is 14

test statistic is 5.23

pvalue is 0.0353

reject the null hypothesis

orchestra answered 1 year ago

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