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swat32
3 years ago
12

What is the expression 6π -3(y+2)

Mathematics
1 answer:
romanna [79]3 years ago
7 0
Y=4


Don’t judge if I’m wrong

Simplifies it would be 18.34-6y-6
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121^4-49

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Step-by-step explanation:

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Arturiano [62]

Answer:

d. t distribution with df = 80

Step-by-step explanation:

Assuming this problem:

Consider independent simple random samples that are taken to test the difference between the means of two populations. The variances of the populations are unknown, but are assumed to be equal. The sample sizes of each population are n1 = 37 and n2 = 45. The appropriate distribution to use is the:

a. t distribution with df = 82.

b. t distribution with df = 81.

c. t distribution with df = 41.

d. t distribution with df = 80

Solution to the problem

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\sigma^2_1 =\sigma^2_2 =\sigma^2

And the statistic is given by this formula:

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Where t follows a t distribution with n_1+n_2 -2 degrees of freedom and the pooled variance S^2_p is given by this formula:

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This last one is an unbiased estimator of the common variance \sigma^2

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df= 37+45-2=80

And the best answer is:

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5 0
2 years ago
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