A brochure claims that the average maximum height for a certain type of plant is 0.
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A brochure claims that the average maximum height for a certain type of plant is 0.7 m. A gardener suspects that

this is not accurate locally due to variation in soil conditions, and believes the local height is shorter. A random sample of 40 mature plants is taken. The mean height of the sample is 0.65 m with a standard deviation of 0.20 m. Test the claim that the local mean height is less than 0.7 m using a 5% level of significance.

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Fail to reject Ho and conclude that there is... View the full answer

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