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11111nata11111 [884]
3 years ago
14

What is the sign of-5×-1/-2

Mathematics
1 answer:
Svetradugi [14.3K]3 years ago
5 0
The sign would be negative because there is an odd number of negatives. If there were an even number of negatives it would be positive.

Multiply -5 by -1

The answer would be -5/2
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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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Since the p-value > 0.05 and $|z_{obs}| \ngtr z_{critical} = 1.959964$, so we fail to reject H_0 at 0.05 level of significance.

Hence we conclude that the two population proportion are not significantly different.

Conclusion :

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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