2 years ago

7th grade math pls help

Mathematics

1 answer:

leva [86]2 years ago

7 0

Answer:

Step-by-step explanation:

308 divided by 4=77

4 sides

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3 years ago

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You are one of 55 people whose name will be drawn for a prize. What is the probability that your name will be drawn first?

suter [353]

Your answer will be 1/55 or A because, at the beginning of the problem it states "you are one of 55 people" ((:

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2 years ago

Use the standard norml distribution or the t-distribution to construct a 99% confidence interval for the population mean. Justif

dalvyx [7]

Answer:

E) we will use t- distribution because is un-known,n<30

the confidence interval is (0.0338,0.0392)

Step-by-step explanation:

Step:-1

Given sample size is n = 23<30 mortgage institutions

The mean interest rate 'x' = 0.0365

The standard deviation 'S' = 0.0046

the degree of freedom = n-1 = 23-1=22

99% of confidence intervals $t_{0.01} =2.82$ (from tabulated value).

$The mean value = 0.0365$

$x±t_{0.01} \frac{S}{\sqrt{n-1} }$

$0.0365±2.82 \frac{0.0046}{\sqrt{23-1} }$

$0.0365±2.82 \frac{0.0046}{\sqrt{22} }$

$0.0365±2.82 \frac{0.0046}{4.690 }$

using calculator

$0.0365±0.00276$

Confidence interval is

$(0.0365-0.00276,0.0365+0.00276)$

$(0.0338,0.0392)$

the mean value is lies between in this confidence interval

(0.0338,0.0392).

Answer:-

using t- distribution because is unknown,n<30,and the interest rates are not normally distributed.

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2 years ago

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FromTheMoon [43]

Answer:

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Step-by-step explanation:

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2 years ago

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Answer:

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3 years ago