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marysya [2.9K]
3 years ago
6

If Julia saved $25 using her 50% off coupon how much did she spend? At another store Julia spent $22 which was 44% of her total

bill. How much did Julia spend all together?
Mathematics
2 answers:
alex41 [277]3 years ago
8 0
She spent 25 dollars at the 1st place, 
EastWind [94]3 years ago
6 0
50 / 2 = 25

$25 * 2 = $50

Julia spent 25 dollars at the first store.

Julia's total bill at the second store was $50, but she only payed $22. 


She spent $50 in all.
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A sample of 300 urban adult residents of a particular state revealed 65 who favored increasing the highway speed limit from 55 t
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Answer and explanation:

Null hypothesis(H0) says sentiment for increasing speed limit in the two populations is the same

Alternative hypothesis(Ha) says sentiment for increasing speed limit in the two populations is different

Where p1 is the first population proportion =65/297= 0.22

And p2 is the second population proportion = 78/189= 0.41

P= p1+p2/n1+n2= 65+78/297+189= 0.29

Hence H0= p1-p2=0

Ha=p1-p2≠0

Test statistic= p1-p2/√p(1-p) (1/n1+1/n2)

= 0.22-0.41/√0.29(1-0.29)(1/297+1/189)

= -4.49

Critical value at 95% significance level= 1.96( from tables)

We therefore reject null hypothesis as critical value is greater than test statistic

Therefore the sentiment for increasing speed limit in the two populations is different

b. at proportions of 0.24 and 0.40 for p1 and p2 respectively

Test statistic = 0.24-0.40/0.29(1-0.29)(1/297+1/189)

= -3.78

P value is 0.0002 at 0.05 significance level

Hence probability =0.4998

7 0
3 years ago
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Answer:

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Step-by-step explanation:

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Answer:

I think it would be A

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