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Mamont248 [21]
3 years ago
8

A circle with a radius of 6cm sits inside a circle with radius of 9cm

Mathematics
2 answers:
pshichka [43]3 years ago
5 0

Answer:

Please provide a question so we can answer, thank you.

sashaice [31]3 years ago
4 0

Where is the question?

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A manager of a grocery store wants to determine if consumers are spending
ololo11 [35]

Answer:

1. The error in the assumption is taking the sample mean, \bar x, as being equal to the population mean, μ

2. To correct the error, the manager will need to generate the confidence interval based on the population standard deviation on the acceptable values of the mean using the following relation;

CI=\bar{x}\pm z\frac{\sigma}{\sqrt{n}}

Step-by-step explanation:

We note that from the central limit theorem as the size of the sample, n, becomes more and more larger, the mean of the sample, \bar x, approaches that of the population mean, μ, therefore as the grocery store manager uses the sample mean as the population mean's point estimate an error will be observed based on the size of the sample compared to the population, where the difference between the two means (the population mean and the sample mean) is \left | \bar{x} - \mu \right |

1. The error in the assumption is taking the sample mean, \bar x, as being equal to the population mean, μ

2. To correct the error, the manager will need to generate the confidence interval based on the population standard deviation on the acceptable values of the mean using the following relation;

CI=\bar{x}\pm z\frac{\sigma}{\sqrt{n}}

Where:

σ = Population standard deviation = $30

z = z value at 95% confidence level = 1.96

\bar x = Sample mean $160

n = Sample size = 10

Plugging in the values, we have;

$141.4 < \bar x < $178.6

Hence the expected value of the mean should be between $141.4 and $178.6.

7 0
3 years ago
Freddy is searching for a shirt and discovers that he has 12 shirts for every 6 pair of jeans. If he has 18 shirts, how many pai
Shtirlitz [24]
The ratio, simplify it
12shirts:6jeans
12/6=2/1
or
2shirts:1jean

18shirts
18/2=9

2shirts times 9=18shirst
2shirts:1jean times 9:9=18shirts:9jeans
answer is 9 pairs of jeans
7 0
2 years ago
To solve the system of equations below, Grace isolated the variable y in the
yulyashka [42]

Answer:

D

Step-by-step explanation:

2y=10x

Divide both sides by 2.

y=5x

Now substitute this into the second equation.

6 0
3 years ago
Read 2 more answers
A person has a loan balance of $3083.86 on the new 23-inch rims and tires he bought for his SUV. If his payments are $106.34 per
dusya [7]
3038.86 / 106.34 = 29

29 months

6 0
1 year ago
Which of the following graphs represents a function?
4vir4ik [10]

Answer: you didnt post graphs to look at

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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