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2 years ago

5

5. It takes Eva 1 hour to wash the car and 2 hour:

2 answers:

borishaifa [10]2 years ago

8 0

B. because I just took a quiz on the exact same thing you’re doing

Digiron [165]2 years ago

6 0

Answer:180 1 hour= 60 minutes 60x3=180

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Sedbober [7]

Answer:

D. Stephen

Hope This Helps! Have A Nice Day!!

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3 years ago

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Classify the expression: 5x + 3x2 − 7x3 + 2.

galina1969 [7]

Answer:

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The Answer is in the picture above please mark me brainliest. :)

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4 years ago

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Can somebody pls help I’ll mark brainliest

Mnenie [13.5K]

<span><u><em>Answer:</em></u>
64

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3 years ago

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What is the first quartile

azamat

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3 years ago

The average expenditure on Valentine's Day was expected to be $100.89 (USA Today, February 13, 2006). Do male and female consume

AfilCa [17]

Answer:

Yes. The male and female consumers differ in the amounts they spend.

Step-by-step explanation:

We can express the null and alternative hypothesis as:

$H_0: \mu_m=\mu_w\\\\H_1: \mu_m\neq\mu_w$

It is assumed a significance level of 0.05.

The standard deviation of the difference of means is calculated as:

$s=\sqrt{\frac{s_m^2}{n_m} +\frac{s_w^2}{n_w} } =\sqrt{\frac{35^2}{40} +\frac{20^2}{30} } =\sqrt{30.625+13.333} =\sqrt{43.958} =6.63$

The test statistic is

$t=\frac{(M_m-M_w)-0}{s}=\frac{135.67-68.64}{6.63}=10.11$

The degrees of freedom are:

$df=n_1+n_2-2=40+30-2=68$

The P-value for t=10.11 is P=0, so it is smaller than the significance level. The null hypothesis is rejected.

We can conclude that male and female consumers differ in the amounts they spend.

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4 years ago