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gavmur [86]
2 years ago
10

Jasmine works at the public library after school. She makes $7.00 per hour. She cannot work more than 15 hours per week. If y =

7x represents Jasmine's earning, what are the values in the domain? A) x ≤ 15 B) 0≤x≤15 C) 1≤x≤15 D) all real numbers
Mathematics
2 answers:
Lesechka [4]2 years ago
8 0
The answer is B hope it helps
antiseptic1488 [7]2 years ago
3 0
Your answer will be B just took the test!!
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A lathe is set to cut bars of steel into lengths of 6 cm. The lathe is considered to be in perfect adjustment if the average len
Gnom [1K]

Answer:

t=\frac{5.97-6}{\frac{0.4}{\sqrt{93}}}=-0.723    

E. -0.723

df=n-1=93-1=92  

p_v =2*P(t_{(92)}  

Since the p value is very high we don't have enough evidence to conclude that the true mean for the lengths is different from 6 cm.

Step-by-step explanation:

Information provided

\bar X=5.97 represent the sample mean for the length

s=0.4 represent the sample standard deviation

n=93 sample size  

\mu_o =6 represent the value that we want to test

\alpha=0.05 represent the significance level

t would represent the statistic  

p_v represent the p value for the test

System of hypothesis

We need to conduct a hypothesis in order to check if the lathe is in perfect adjustment (6cm), then the system of hypothesis would be:  

Null hypothesis:\mu = 6  

Alternative hypothesis:\mu \neq 6  

since we don't know the population deviation the statistic is:

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

Replacing in formula (1) we got:

t=\frac{5.97-6}{\frac{0.4}{\sqrt{93}}}=-0.723    

E. -0.723

P value

The degrees of freedom are given by:

df=n-1=93-1=92  

Since is a two tailed test the p value would be:  

p_v =2*P(t_{(92)}  

Since the p value is very high we don't have enough evidence to conclude that the true mean for the lengths is different from 6 cm.

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3 years ago
Ahmet is twice as old as his sister Betul, and the sum of their ages is 36. How old is Ahmet?
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18??
two times as old.
36 divided but 2 is 18
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