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Harlamova29_29 [7]
3 years ago
5

Melissa purchased 39.46 in groceries

Mathematics
1 answer:
kolbaska11 [484]3 years ago
3 0

Answer:3948

Step-by-step explanation:

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<em>3.5</em>
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Using the answers from z^4=16 determine the solutions of the equation (x+1)^4=16(x-1)^4​
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A statistician chooses 27 randomly selected dates, and when examining the occupancy records of a particular motel for those date
Anni [7]

Answer:

Confidence interval variance [21.297 ; 64.493]

Confidence interval standard deviation;

4.615, 8.031

Step-by-step explanation:

Given :

Variance, s² = 34.34

Standard deviation, s = 5.86

Sample size, n = 27

Degree of freedom, df = 27 - 1 = 26

Using the relation for the confidence interval :

[s²(n - 1) / X²α/2, n-1] ; [s²(n - 1) / X²1-α/2, n-1]

From the chi distribition table :

X²α/2, n-1 = 41.923 ; X²1-α/2, n-1 = 13.844

Hence,

[34.34*26 / 41.923] ; [34.34*26 / 13.844]

[21.297 ; 64.493]

The 95% confidence interval for the population variance is :

21.297 < σ² < 64.493

Standard deviation is the square root of variance, hence,

The 95% confidence interval for the population standard deviation is :

4.615 < σ < 8.031

3 0
3 years ago
A + 2 ÷ -24 = -4 what does A equal​
sergeinik [125]

Step-by-step explanation:

A + 2 ÷ (-24) = -4

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A = -4 + 1/12

A = -48/12 + 1/12

A = -47/12

A ≈ -3,91

4 0
2 years ago
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