
The Electronic Protocol Book Table of contents

BioToolKit 300 Download Trials

An electronic protocol book with 500 protocols and
100 recipes. A great quick and practical reference for bench scientists
as well as for new students.
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A collection of tools frequently used by bench biomedical scientists, ranging from centrifugation
force conversion, molecular weight, OD, recipe calculators, to clinical calculators. Include all Primo 3.4, Abie 3.0, Heatmap Viewer, MicroHelper, Godlist Manager, label printing, and grade book.
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Chisquare Test
Test of independence
A vaccine trail produced the following results:
infected uninfected
placebo 81 1427
vaccine 179 2824
The null hypothesis: there is no relationship between row and column frequencies,
i.e., vaccine/placebo will not have any effect in the infected/uninfected frequencies.
Using test of independence, we find p = 0.42 and conclude that the null hypothesis cannot be rejected,
i.e., the vaccine is not effective.
Goodness of fit
The cross of A a B b X a a b b is used to determine whether the two loci are linked. The results
are shown below:
A a B b 310
a a b b 315
A a b b 287
a a B b 288
The null hypothesis: the two loci are not linked, thus the ratio should be 1:1:1:1.
The expected frequencies are:
A a B b 300
a a b b 300
A a b b 300
a a B b 300
Using the Goodness of fit test, we find p = 0.55. So the null hypothesis cannot be rejected:
the two loci may not be linked.
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