2 years ago

Please help me with the question below

Mathematics

2 answers:

eduard2 years ago

6 0

Answer:

31.41

Step-by-step explanation:

Substitute

Lana71 [14]2 years ago

5 0

$\bold{ANSWER:}$
31.4 sq feet

$\bold{SOLUTION:}$

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Step-by-step explanation:

24 x 2/3

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yanalaym [24]

Answer: -1.51

Step-by-step explanation:

Let $\mu$ be the population mean rating of car.

As per given , we have

$H_0: \mu=42.8$

$H_a: \mu\neq42.8$

Since population variance is known, so we use z-test.

Test statistic : $z=\dfrac{\overline{x}-\mu}{\sqrt{\dfrac{\sigma^2}{n}}}$

, where n= sample size

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$\sigma^2$ = variance

As per given ,

n=300

$\overline{x}=42.6$

$\sigma^2=5.29$

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Put these values in formula we get

$z=\dfrac{42.6-42.8}{\sqrt{\dfrac{5.29}{300}}}$

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