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valentina_108 [34]
3 years ago
15

Z/6 + 2 = −18 what does z equal

Mathematics
1 answer:
Nataliya [291]3 years ago
8 0

Answer:

z/6 +2=-18

z/6=-18-2

z/6=-20

z/6 *6=-20*6 we multiple both sides with 6 to remove 1/6 from z

z=-120

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An article describes an experiment to determine the effectiveness of mushroom compost in removing petroleum contaminants from so
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Solution :

Let p_1 and p_2  represents the proportions of the seeds which germinate among the seeds planted in the soil containing 3\% and 5\% mushroom compost by weight respectively.

To test the null hypothesis H_0: p_1=p_2 against the alternate hypothesis  H_1:p_1 \neq p_2 .

Let \hat p_1, \hat p_2 denotes the respective sample proportions and the n_1, n_2 represents the sample size respectively.

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The test statistic can be written as :

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We reject H_0 at 0.05 level of significance, if the P-value or if |z_{obs}|>Z_{0.025}

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There is not sufficient evidence to conclude that the \text{proportion} of the seeds that \text{germinate differs} with the percent of the \text{mushroom compost} in the soil.

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