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djverab [1.8K]
3 years ago
13

Mabel Spends 4 hours to edit a 3 minute long video.She edit at a consistent rate.how long does mable spend to edit a 9 minute lo

ng video
Mathematics
1 answer:
Lelechka [254]3 years ago
4 0

A 9 minute video is 3 times the length of the 3 minute movie ( 9 / 3 = 3) so it will take her 3 times as long to edit it.

4 hours x 3 = 12 hours.

It will take her 12 hours.

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Its better to choose the simple random samples, if the defect is in every other cake, a systematic random sample could miss it completely depending on what Sergio chooses for k.

Here he is  taking a random sample of cakes to get a better idea of how many cakes might have this defect.

The random sample is defined as the method of choose a sample from the group of sample and each of the sample has same probability of being chosen

The systematic sample is the method of choosing the sample from the group of sample with a periodic interval.

Here Sergio noticed a potential defect that seems to be showing in every other cake, so there will be chance of missing the defect completely

Hence, to choose the defect items, the simple random sample is better than systematic random sample.

Learn more about simple random sample here

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