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timurjin [86]
3 years ago
8

Which is a good comparison of the estimated sum and actual sum of 7 holes 9+/12 holes and 11 12s

Mathematics
1 answer:
bearhunter [10]3 years ago
6 0
Might help 16/12 sorry if is wrong think that help
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(1/3)•(-2) = ?<br><br> Please answer ASAP!! :)
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-.6 repeating

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Simplify the expression using Order of operations: (3x3-3)² ÷3+3
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For a statistics class project, a college student randomly samples 75 men who exercise at a gym regularly and 68 women who exerc
raketka [301]

Answer:

iii. The data do not provide sufficient evidence to conclude that the mean number of minutes exercised per week is larger for men than for women at this gym

Step-by-step explanation:

1) The hypotheses are

H0: u1 ≤ u2 against the claim Ha: u1 > u2

The men spend less or equal time than the women  at the gym each week

vs

the men  spend greater time  than the women at the gym each week

2) The test statistic is

t= (x1`- x2`) / √ s1²/n1+ s2²/n2

t= 65.7- 64.8/√(13.9)²/75 + (9.6)²/68

t= 0.9/√2.57613 +1.35529

t=0.4539

and the degrees of freedom is

3) υ = [s₁²/n1 + s₂²/n2]²/ (s₁²/n1 )²/ n1-1 + (s₂²/n2)²/n2-1

=[(13.9)²/75 + (9.6)²/68]²/ [(13.9)²/75 ]² /74 + [ (9.6)²/68]²/67

= 139

The degrees of freedom is always rounded in this calculation

4) The Critical region is [1.656, ∞]

5) t-score is outside of the critical region, so there is not enough evidence to reject H₀.

iii. The data do not provide sufficient evidence to conclude that the mean number of minutes exercised per week is larger for men than for women at this gym

4 0
2 years ago
Using f(x) = -5x + 12, evaluate f (-2)
marin [14]

Answer:

<h2>22</h2>

Step-by-step explanation:

f(-2) means that the "x" variable in the equation can be substituted for -2

So, we have

-5(-2) + 12

This equals 10 + 12 = 22

So, the answer is 22

3 0
2 years ago
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