2 years ago

Struggling with 15, any help would me appreciated

Mathematics

1 answer:

Neko [114]2 years ago

5 0

Y equals 48 because it’s a rise of 1 over 4

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As $Z$ , 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:

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$\mu=0.70\\N=40\\\alpha=0.05\\X=0.65\\s=0.20$

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$H_{0}=\mu=0.70$

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From the one tail standard normal chart, whe have Z-value for $\alpha=0.05$ is 1.56

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$Z_{\alpha}=1.56\\Z=-1.58$

$-1.58$

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