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2 years ago

HELP ME PLZ WILL MARK U AS BRAINLIEST

Mathematics

1 answer:

Contact [7]2 years ago

8 0

Answer:

1.33

Step-by-step explanation:

so mean is the average

so what you have to do is add the numbers for each person and then divide by the amount of numbers present. the question is asking for the difference so subtract the numbers for each from person.

mia's mean= 34.33

sophia's mean= 35.667

sophia-mia= 1.33

(check my work, and if you need help just comment)

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Jarred wants to buy a go-cart for $1,200. His part-time job pays him $160 a week. He has already saved $400. Which inequality re

STatiana [176]

Answer:

He will need to work a minimum of 5 weeks

Step-by-step explanation:

1,200-400=800

800 divded by 160=5

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2 years ago

What two numbers are located 5/8 of a unit from 1/6 on a number line

velikii [3]

Step 1
Find the common denominator.
5/8 and 1/6---------> would be 2³*3----> 24

step 2
multiply (5/8) by (3/3) and (1/6) by (4/4)
5/8-----> 15/24
1/6-----> 4/24

step 3
find the numbers
4/24+15/24------> 19/24
4/24-15/24-------> -11/24

the answer is
the two numbers are
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see the attached figure

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2 years ago

PLS HELP, THANK YOUU

ruslelena [56]

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7 0

3 years ago

Read 2 more answers

A statistician selected a random sample of 125 observations from a population with a known standard deviation equal to 16 and co

serious [3.7K]

Answer:

Step-by-step explanation:

Given that a statistician selected a random sample of 125 observations from a population with a known standard deviation equal to 16 and computed a sample mean equal to 77

We can use Z critical values since population std deviation is known. Also sample size >30

We find std error of mean = $\frac{16}{\sqrt{125} } \\=1.4311$

Margin of error = Z critical value * 1.4311

Z critical values for 93% = 1.81

for 89% = 1.60

n Std error Z critical Conf interval

89%

125 1.4311 1.6 (74.71024 79.28976 )

93%

1.81 (74.409709 79.590291 )

We find that when confidence level increases interval width increses.

c) When sigma changes to 441, std error changes to $\frac{16}{\sqrt{441} } \\=0.7619$

So we get

n Std error Z critical Conf interval

89%

441 0.7619 1.6 (75.781 78.219 )

93%

1.81 (75.621 78.37904)

d) When n = 625, std error changes to 16/25 = 0.64

n Std error Z critical Conf interval

89%

441 0.64 1.6 (75.976 78.024 )

93%

1.81 (75.842 78.1584)

When sample size increases, confidence interval width decreases.

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3 years ago

What is 1/10 of 3,000?

yanalaym [24]

The answer would be 300

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3 years ago