2 years ago

Question 3

1 answer:

4 0

The answer to this is a

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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

Confidence coefficient (Z) at 90% = 1.645

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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3 years ago

nikdorinn [45]

Answer:

4p,q+r

4p(q+r)

4pq+4pr

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2 years ago

Feliz [49]

It’s D because 12/2=6
i think thats right

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2 years ago

artcher [175]

It is C. floor 20 and floor c have the same amount of tenants

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2 years ago

sveticcg [70]

8x is the final answer.

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2 years ago