Saprolegnia diclina is a pathogen of amphibian embryos and acts synergistically

Question

Saprolegnia diclina is a pathogen of amphibian embryos and acts synergistically with concentrations of the common herbicide glyphosate to increase the mortality among embryos of the Cascade frog (Rana cascadae). A student was interested in determining the effect of glyphosate alone on the growth of this protist. He exposed a number of colonies of the organism (these organisms grow as filamentous colonies that are all interconnected and spread out in roughly circular masses over time) to different concentrations of glyphosate (measured in parts per million or milligrams per liter) and then measured the diameter of the colonies (in mm) after 24 hours. Can concentration be used to predict the diameter of colonies?

What is the alternative hypothesis? What is the null hypothesis?

A. p = 0

B. 0

C. = 1

D. = -1

E. = 0

F. 0

G. = 1

H. 0

I. 0

J. > 0

K. < 0

Explanation / Answer

Here the claim is to determine whether there any correlation between two variables viz. concentration of glyphosate and grwoth of protist.

This means we are interested in knowing whether the correlation coeffient is not equal to zero.

Hence below are the null and alternate hypothesis
H0: p = 0
H1: p not equals to 0

Here p = rho (coeff. of correlation)

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