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tresset_1 [31]
3 years ago
10

Nobody knows it somebody hel

Mathematics
1 answer:
Tpy6a [65]3 years ago
8 0
The answer would be 160!!
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1. Find the 90% Cl for the population mean if sample
Elden [556K]

Answer:

The answer is below

Step-by-step explanation:

1)

mean (μ) = 12, SD(σ) = 2.3, sample size (n) = 65

Given that the confidence level (c) = 90% = 0.9

α = 1 - c = 0.1

α/2 = 0.05

The z score of α/2 is the same as the z score of 0.45 (0.5 - 0.05) which is equal to 1.65

The margin of error (E) is given as:

E=Z_{\frac{\alpha}{2} }*\frac{\sigma}{\sqrt{n} } =1.65*\frac{2.3}{\sqrt{65} } =0.47

The confidence interval = μ ± E = 12 ± 0.47 = (11.53, 12.47)

2)

mean (μ) = 23, SD(σ) = 12, sample size (n) = 45

Given that the confidence level (c) = 88% = 0.88

α = 1 - c = 0.12

α/2 = 0.06

The z score of α/2 is the same as the z score of 0.44 (0.5 - 0.06) which is equal to 1.56

The margin of error (E) is given as:

E=Z_{\frac{\alpha}{2} }*\frac{\sigma}{\sqrt{n} } =1.56*\frac{12}{\sqrt{45} } =2.8

The confidence interval = μ ± E = 23 ± 2.8 = (22.2, 25.8)

8 0
3 years ago
If two cities are 20 miles apart and a map shows the cities 0.75" apart, how many
nordsb [41]

Answer:

26.6666... repeating

Step-by-step explanation:

20/3 = 6.6 repeating

.75/3 = .25

6.6 + 20 = 26.6 repeating

.25 + .75 = 1

6 0
3 years ago
Read 2 more answers
What is the answer to the following equation:<br><br> 1 + 1 = x
Lelechka [254]
X=2


Reason why is because 1+1 is 2 and X is what your product is
3 0
3 years ago
Read 2 more answers
3 1 _______<br> x 1 1<br> 15
DedPeter [7]

Answer:

45

Step-by-step explanation:

5 0
3 years ago
Can a triangle be formed with angles having measures of 30°, 70°, and 110°
abruzzese [7]
As long as it makes 180 but that doesn't so no.
5 0
4 years ago
Read 2 more answers
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