A medical laboratory tested 8 samples of human blood for acidity on the pH scale, with the results below. 7.6βββ 7.5βββ 7.4βββ 7.3βββ 7.1βββ 7.3βββ 7.6βββ 7.1 a. Find the mean and standard deviation. b. What percentage of the data is within 2 standard deviations of the mean?
Added by Brenda A.
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6 + 7.5 + 7.4 + 7.3 + 7.1 + 7.3 + 7.6 + 7.1) / 8 = 7.35 Show moreβ¦
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A medical laboratory tested 8 samples of human blood for acidity on the pH scale, with the results below. 7.1βββ 7.5βββ 7.5βββ 7.6βββ 7.3βββ 7.2βββ 7.3βββ 7.2 a. Find the mean and standard deviation. b. What percentage of the data is within 3 standard deviations of the mean?
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Blood pH A medical laboratory tested 21 samples of human blood for acidity on the pH scale, with the following results. $\begin{array}{llllll}{7.1} & {7.5} & {7.3} & {7.4} & {7.6} & {7.2} & {7.3} \\ {7.4} & {7.5} & {7.3} & {7.2} & {7.4} & {7.3} & {7.5} \\ {7.5} & {7.4} & {7.4} & {7.1} & {7.3} & {7.4} & {7.4}\end{array}$ a. Find the mean and standard deviation. b. What percentage of the data is within 2 standard deviations of the mean?
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