Nitrites are often added to meat products as preservatives. in a study of the effect of these chemicals on bacteria, the rate of uptake of a radio-labeled amino acid was measured for a number of cultures of bacteria, some growing in a medium to which nitrites had been added. here are the summary statistics from this study.

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Biology

Delaney

29 January, 22:55

Nitrites are often added to meat products as preservatives. in a study of the effect of these chemicals on bacteria, the rate of uptake of a radio-labeled amino acid was measured for a number of cultures of bacteria, some growing in a medium to which nitrites had been added. here are the summary statistics from this study.

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Leilani Roach · Answer 1

Nitrites are 307880 115 and control is 30 8112 1250

Let X be nitrate group and let Y be a control group.

If ∪X-∪Y∠0 then we can say that nitrates decrease the number of amino acids which is taken.

Hypothesis test.

H0:∪X-∪Y=0Vs. Where H1:∪X-∪Y∠0.

Sample for X = 7880 and Y = 8112 and Sx∧2=variance sample for X = 1115∧2 = 1243225 and Sy∧2 = variancesample for Y = 1250∧2 = 1562500. The size of the sample = 30 for both cases.

Test statistics is Z = ((7880-8112) - 0) / squareroot (1243225/30+1562500/30) = 0.758623)

Value of P = P (Z∠z)

=P (Z∠-0.758623).

Since P-value is greater than the importance of 0.02, we can not reject the null hypothesis. The conclusion is that ∪x-∪y = 0 a good example is nitrates does not decrease the number of amino acid which is taken.