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3 years ago

Its this sign

formula"> going to be an open or closed circle on a number line?

Mathematics

1 answer:

Nuetrik [128]3 years ago

3 0

Answer:

Closed circle

Step-by-step explanation:

Its close circle because the number is included

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What are all the common factors?

lord [1]

Answer:

2,3,6

Step-by-step explanation:

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4 years ago

From a random sample of 58 businesses, it is found that the mean time the owner spends on administrative issues each week is 21.

zzz [600]

Answer: (20.86, 22.52)

Step-by-step explanation:

Formula to find the confidence interval for population mean :-

$\overline{x}\pm z^*\dfrac{\sigma}{\sqrt{n}}$

, where $\overline{x}$ = sample mean.

z*= critical z-value

n= sample size.

$\sigma$ = Population standard deviation.

By considering the given question , we have

$\overline{x}= 21.69$

$\sigma=3.23$

n= 58

Using z-table, the critical z-value for 95% confidence = z* = 1.96

Then, 95% confidence interval for the amount of time spent on administrative issues will be :

$21.69\pm (1.96)\dfrac{3.23}{\sqrt{58}}$

$=21.69\pm (1.96)\dfrac{1.7}{7.61577}$

$=21.69\pm (1.96)(0.223221)$

$\approx21.69\pm0.83$

$=(21.69-0.83,\ 21.69+0.83)=(20.86,\ 22.52)$

Hence, the 95% confidence interval for the amount of time spent on administrative issues = (20.86, 22.52)

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3 years ago

What is x divided by 2?

Aleonysh [2.5K]

X/2 is the same thing as 1/2x

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3 years ago

Help anyone can help me do this question 3,I will mark brainlest.

Arisa [49]

Answer:

a.20 people take both types of drink.

b.22 people drink milk only..

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3 years ago

Please show step by step explanation!!

iren [92.7K]

Answer:

Step-by-step explanation:x 1/2 p=75 add that by 9

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2 years ago