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artcher [175]
3 years ago
8

Help fast!!! will mark brilliant !!!!!!!

Mathematics
2 answers:
Angelina_Jolie [31]3 years ago
7 0

Answer:

A is the answer

Step-by-step explanation:

vfiekz [6]3 years ago
6 0

Answer:

A is the correct answer

Step-by-step explanation:

Because the dot on -1 means -1,2 and the dot on -5 means -5,2 I hope this helps

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The mean annual tuition and fees for a sample of 12 private colleges was 36,800 with a standard deviation of 5,000 . A dotplot s
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Answer:

The value of the test statistic and degrees of freedom is 2.148 and 11 respectively.

Step-by-step explanation:

Consider the provided information.

The mean annual tuition and fees for a sample of 12 private colleges was 36,800 with a standard deviation of 5,000 .

Thus, n = 12, \bar x=36800 σ = 5000

degrees of freedom = n-1 = 12-1 = 11

H_0: \mu = 33700\ and\ H_a: \mu \neq 33700

Formula to find the value of z is: z=\frac{\bar x-\mu}{\frac{\sigma}{\sqrt{n}}}

Where \bar x is mean of sample, μ is the mean of population, σ is the standard deviation of population and n is number of observations.

z=\frac{36800-33700}{\frac{5000}{\sqrt{12}}}

z=2.148

Hence, the value of the test statistic and degrees of freedom is 2.148 and 11 respectively.

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3 years ago
Ms. Cathy bought a package of pens. Out of every 10 pens, 6 are black. If there are 20 pens in the pack, what fraction of the pe
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12/20 or 60%

Step-by-step explanation:

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If y=12, what is the value of 85y+8-80y?
finlep [7]

Answer: 68

Step-by-step explanation: Because I am smart  

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Virgo characteristics
Delvig [45]
Thank you :)
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