## 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 locall

Question

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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Math
3 months
2021-10-17T15:11:09+00:00
2021-10-17T15:11:09+00:00 1 Answer
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## Answers ( )

Answer:As , it is possible to reject null hypotesis. It means that the local mean height is less tha 0.7 m with a 5% level of significance.

Step-by-step explanation:1. Relevant data:2. Hypotesis testing3. Find the rejection areaFrom the one tail standard normal chart, whe have Z-value for is 1.56

Then rejection area is left 1.56 in normal curve.

4. Find the test statistic:5. Hypotesis TestingAs , it is possible to reject null hypotesis. It means that the local mean height is less tha 0.7 m with a 5% level of significance.