2 years ago

Help again thank you

Mathematics

1 answer:

Anarel [89]2 years ago

7 0

Rational:5,737…..
Irrational:9

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Suppose that a jewelry store tracked the amount of emeralds they sold each week to more accurately estimate how many emeralds to

denpristay [2]

Answer: The point estimate for the mean is <u>2.59</u> and the margin of error is <u>0.13</u> .

Step-by-step explanation:

The confidence interval for population mean is given by :-

$\mu\pm E$ , where E is the margin of error .

Given : At the end of one year, the store used the weekly sales information to construct a 95% confidence interval for the mean number of emeralds sold per week.

The confidence interval they calculated was (2.46,2.72) .

The lower limit of the confidence interval : $\mu-E=2.46$ (1)

The upper limit of the interval : $\mu+E=2.72$ (2)

Adding (1) and (2) , we get

$2\mu=5.18\\\\\Rightarrow\mu=2.59$

Now, Subtracting (1) from (2) , we get

$2E =0.26\\\\\Rightarrow\ E=0.13$

Hence, the point estimate for the mean is 2.59 and the margin of error is 0.13 .

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3 years ago

Ally makes $15 per hour. She works 40 hours a week. How much money will Ally make in February? Hint: February has 28 days.

Andreyy89

15x40=600
600x28=1,680

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3 years ago

Read 2 more answers

In the first year if ownership, a new car lose 20% of its value. If a car lost $4,200 value in the first year, how much did the

sesenic [268]

Answer:

Step-by-step explanation:

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3 years ago

What is another way to write the ratio 3:4?

S_A_V [24]

You could write it as a fraction (3/4) or you could say "3 to 4".

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3 years ago

What is the value of y if log <base 5> <index -7> = y?

Dvinal [7]

Answer:

Hence, the value of y is undefined.

Step-by-step explanation

$log_{5} (-7) = \frac{log(-7)}{log(5)}$ from the property, log_a (b) = (log(a))/log(b).

The value log (-7) was not defined. So, the entire log value also not defined.

Hence, the value of y is undefined.

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2 years ago