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4 years ago

Please answer the question to the best of your ability :)

Mathematics

1 answer:

Korolek [52]4 years ago

3 0

Answer:

7x^2y(2x-3y)

Step-by-step explanation:

Factor 7x^2y out of 14x^3y-21x^2y^2

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Test the claim that the mean GPA of Orange Coast students is smaller than the mean GPA of Coastline students at the 0.005 signif

algol [13]

Answer:

a) F. H 0 : μ O ≥ μ C

H 1 : μ O < μ C

b) B. two-tailed

d) $t=\frac{(2.91-2.96)-0}{\sqrt{\frac{0.05^2}{60}+\frac{0.03^2}{60}}}}=-6.64$

e) $p_v =P(t_{118}$

f) B. Reject the null hypothesis

Step-by-step explanation:

Information provided

$\bar X_{O}=2.91$ represent the mean for the Orange Coast

$\bar X_{C}=2.96$ represent the mean for the Coastline

$s_{O}=0.05$ represent the sample standard deviation for Orange Coast

$s_{C}=0.03$ represent the sample standard deviation for Coastline

$n_{O}=60$ sample size for Orange Coast

$n_{C}=60$ sample size for Coastline

$\alpha=0.005$ Significance level provided

t would represent the statistic

Part a

For this case we want to test the claim that the mean GPA of Orange Coast students is smaller than the mean GPA of Coastline students

Null hypothesis: $\mu_{O} \geq \mu_{C}$

Alternative hypothesis: $\mu_{O} < \mu_{C}$

F. H 0 : μ O ≥ μ C

H 1 : μ O < μ C

Part b

For this case we need to conduct a left tailed test.

B. two-tailed

Part d

The statistic is given by:

$t=\frac{(\bar X_{O}-\bar X_{C})-\Delta}{\sqrt{\frac{s^2_{O}}{n_{O}}+\frac{s^2_{C}}{n_{C}}}}$ (1)

And the degrees of freedom are given by $df=n_1 +n_2 -2=60+60-2=118$

Replacing the info we got:

$t=\frac{(2.91-2.96)-0}{\sqrt{\frac{0.05^2}{60}+\frac{0.03^2}{60}}}}=-6.64$

Part e

We can calculate the p value with this probability:

$p_v =P(t_{118}$

Part f

Since the p value is a very low value compared to the significance level given of 0.005 we can reject the null hypothesis.

B. Reject the null hypothesis

5 0

3 years ago

What is the solution to the equation 3(2x+5)=3x+4x<br> A.x=0<br> B.x=4<br> C.x=5<br> D.x=15

Ivan

x=15 and i have to write some more for 20 letters

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3 years ago

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X/3 coefficient helpppppp

vodka [1.7K]

<h3>Answer: 1/3</h3>

We can rewrite x/3 as (1/3)*x, and see that the coefficient is 1/3

This is the number to the left of the variable.

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4 years ago

when jane uses her calling card overseas, the cost of a phone call is .75 for the first three minutes and. 12 for each additiona

artcher [175]

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3 years ago

Mr. Tyssee got a haircut, which cost $35. He gave the

Nutka1998 [239]

Answer:

$40.25

Step-by-step explanation:

15% = 0.15, so multiply 35 * 0.15 = 5.25 to get the tip.

Since the answer is asking for both the tip and the cost, add 35 + 5.25, which gives the answer $40.25

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3 years ago

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