3 years ago

Its my final, please help!!!!!!!!!!

Mathematics

1 answer:

sweet-ann [11.9K]3 years ago

7 0

Answer:

both apply

Step-by-step explanation:

i guessed just do it

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For a random sample of 50 measurements on the breaking strength of cotton threads, the mean breaking strength was found to be 21

Vikentia [17]

Answer:

205.81 to 214.19

Step-by-step explanation:

Sample size (n) = 50

Sample mean weight (X) = 210 grams

Sample standard deviation (s) = 18 grams

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The confidence interval for the true mean breaking strength of cotton threads of this type, at a 90% confidence level, is given by:

$CI=X \pm Z*\frac{s}{\sqrt n}\\CI=210 \pm 1.645*\frac{18}{\sqrt 50}\\CI = 210 \pm 4.19\\CI =205.81\ to\ 214.19$

The confidence interval is 205.81 grams to 214.19 grams.

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Nina earns $117.60$117.60 for 1414 hours of work.

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Find p if 4P = 0.25<br>

Andrej [43]

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Step-by-step explanation:

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plz mark brainliest

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3 years ago

Read 2 more answers

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Aleks04 [339]

I think it should be w+28/4 if thats one of the answer choices.

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