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Anna007 [38]
3 years ago
14

19. Rae supervises a loading dock. She

Mathematics
1 answer:
Rina8888 [55]3 years ago
5 0

Answer:

85% of the job is finished.

Step-by-step explanation:

The way to find the percentage is to divide 119 by 140, which will come out to be .85.

Multiply .85 by 10 to have it as a whole number for the percentage.

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Construct a​ 95% confidence interval for the population​ mean, mu. Assume the population has a normal distribution. A random sam
aniked [119]

Given Information:  

Number of lithium batteries = n = 16

Mean life of lithium batteries = μ = 645 hours

Standard deviation of lithium batteries = σ = 31 hours

Confidence level = 95%  

Required Information:  

Confidence Interval = ?

Answer:  

CI = 628.5 \: to \: 661.5 \: hours

Step-by-step explanation:  

The confidence interval is given by

CI = \mu \pm t_{\alpha/2} (\frac{\sigma}{\sqrt{n}})

Where μ is the mean life of lithium batteries, σ is the standard deviation, n is number of lithium batteries selected, and t is the critical value from the t-table with significance level of

tα/2 = (1 - 0.95) = 0.05/2 = 0.025

and the degree of freedom is

DoF = n - 1 = 16 - 1 = 15

The critical value (tα/2) at 15 DoF is equal to 2.131 (from the t-table)

CI = 645 \pm 2.131(\frac{31}{\sqrt{16}})

CI = 645 \pm 2.131(7.75})

CI = 645 \pm 16.515

CI = 645 - 16.515 \: and \: 645 + 16.515

CI = 628.5 \: to \: 661.5 \: hours

Therefore, the 95% confidence interval is 628.5 to 661.5 hours

What does it mean?

It means that we are 95% confident that the mean life of 16 lithium batteries is within the interval of (628.5 to 661.5 hours)

6 0
3 years ago
How to do this problem
borishaifa [10]

5. since 2/3 cups goes into 1 tortilla , if she finds out how many 1/3 cups go into 8 cups, she would need to divide that amount

6, since it takes less than 1 cup for each tortilla, she should be able to fill more than 8

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This affects earth’s climate because… (Select all that apply) Select one or more: a. Heat is trapped in carbon b. There are fewe
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C. carbon is found in all living things

a. heat is trapped in carbon
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wages have been rising at 6% per year in your area. if this continues, how much will you need to pay you $14 per hour employees
Flura [38]

Answer:

15.73

Step-by-step explanation: I just kinda guessed and got it right.

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3 years ago
Mark is solving the following system.
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I think its he didnt eliminate the same variables
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3 years ago
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