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# Statistics of Plant Heights

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Heights were measured for a random sample of 20 plants grown while being treated with a particular nutrient. The sample mean and sample standard deviation of those height measurements were 39 centimeters and 12 centimeters, respectively.

Assume that the population of heights of treated plants is normally distributed with mean M. Based on the sample, can it be concluded that M is different from 45 centimeters? Use the 0.1 level of significance.

Perform a two-tailed test. Then fill in the table below.

The null hypothesis is:
The alternative hypothesis is:
The type of test statistics: z, t, chi square, f
The result of the test statistics (rounded to at least three decimals)
The p-value(rounded to at least three decimals)

https://brainmass.com/statistics/hypothesis-testing/248300

#### Solution Summary

The statistics of plant heights for a particular nutrient is examined.

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## Biology Problems: statistics (mean, variance, standard deviation, standard error), sequence of genes

47. Corn plants from a test plot are measured, and the distribution of heights at 10-cm intervals is recorded below.

(see chart in attached file)

Calculate (a) the mean height, (b) the variance (c) the standard deviation, and (d) standard error of the mean.

48. The genes dumpy wing (dp), clot eye (cl), and apterous wing (ap) are linked on chromosome 2 of Drosophila. In a series of two-point mapping crosses, the following genetic distance were determined:
dp-ap 42
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What is the sequence of three genes?

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