2 years ago

Help please, need the answer fast!!

Mathematics

1 answer:

Yuri [45]2 years ago

6 0

Answer:

b. the rate at which the account is increasing

Step-by-step explanation:

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Irina18 [472]

Answer:

(-8,8)

Step-by-step explanation:

Simplify |n| + 4 < 12. To do this, subtract 4 from both sides. This results in:

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3 years ago

sarayu went to the movies with her friends. she had a coupon that give each person $2.75 off their ticket. The tickets originall

yaroslaw [1]

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They bought 12 tickets

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3 years ago

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IrinaK [193]

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Step-by-step explanation:

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3 years ago

A random sample of 23 items is drawn from a population whose standard deviation is unknown. The sample mean isx⎯ ⎯ x¯ = 840 and

gayaneshka [121]

Answer:

$(832.156, \ 847.844)$

Step-by-step explanation:

Given data :

Sample standard deviation, s = 15

Sample mean, $\overline x = 840$

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a). 98% confidence interval

$\overline x \pm t_{(n-1, \alpha /2)}. \frac{s}{\sqrt{n}}$

$$E= t_{( n-1, \alpha/2 )} \frac{s}{\sqrt n}}$

$t_{(n-1 , \alpha/2)} \frac{s}{\sqrt n}$

$t_{(n-1, a\pha/2)}=t_{(22,0.01)} = 2.508$

∴ $E = 2.508 \times \frac{15}{\sqrt{23}}$

$E = 7.844$

So, 98% CI is

$(\overline x - E, \overline x + E)$

$(840-7.844 , \ 840+7.844)$

$(832.156, \ 847.844)$

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2 years ago

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