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Pavlova-9 [17]
3 years ago
5

Select the two correct answers rhat are equal to 83.04? A. Eighty three and forty one tenths b. (8x 10) + (3x1) + ( 4x 1/10) + 1

x 1/100) c. Eighty three and forty one hundredths d. (8 x 10) + ( 3 x 1) + ( 4 x 1/100) + 1 x 1/1000) e. Eighty three and forty one thousandths
Mathematics
1 answer:
denpristay [2]3 years ago
3 0
The answer would be "b." and "a." i think

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A simple random sample of 60 households in city 1 is taken. In the sample, there are 45 households that decorate their houses wi
murzikaleks [220]

Answer:

The calculated value of z = - 0.197  falls in the critical region therefore we reject the null hypothesis and conclude that  at  the 5% significance level there is significant difference in population proportions of households that decorate their houses with lights for the holidays

Step-by-step explanation:

We formulate the null and alternative hypotheses as

H0: p1= p2 there is no difference in population proportions of households that decorate their houses with lights for the holidays

against Ha : p1≠ p2  (claim)  ( two sided)

The significance level is set at ∝= 0.05

The critical value for two tailed test at alpha=0.05 is ± 1.96

or Z∝= 0.05/2= ± 1.96

The test statistic is

Z = p1-p2/√pq(1/n1 +1/n2)

p1= proportions of households  decorating in city 1  = 45/60=0.75

p2= proportions of households  decorating in city 2 = 40/50= 0.8

p = the common proportion on the assumption that the two proportion are same.

p =   \frac{n_1p_1 +n_2p_2}{n_1+n_2}

Calculating

p =60 (0.75) + 50 (0.8) / 110

p=  45+ 40/110= 85/110 = 0.772

so  q = 1-p= 1- 0.772= 0.227

Putting the values in the test statistic and calculating

z= 0.75- 0.8/ √0.772*0.227( 1/60 + 1/50)

z= -0.05/√ 0.175244 ( 110/300)

z= -0.05/0.25348

z= -0.197

The calculated value of z = - 0.197  falls in the critical region therefore we reject the null hypothesis and conclude that  at  the 5% significance level there is significant difference in population proportions of households that decorate their houses with lights for the holidays

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3 years ago
I need to know the answer to the question
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B.) 18x^3


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8 0
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Steven earns extra money babysitting. He charges $31.25 for 5 hours and $50 for 8 hours explain why the relationship between how
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You should divide $31.25 by 5 and $50 by 8 and then see how the realationship are similar
8 0
3 years ago
What is -5x minus x? This one's a tricky one for me. The question is (-5) - x - 10. Thanks if you answer!
MAXImum [283]
If you start in the lobby, go down 5 floors, and then
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Robert earned $37.38 on Monday, $20.46 on Tuesday, and $49.84 on Wednesday. He calculated that he earned $87.22 for the three da
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