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Anuta_ua [19.1K]
3 years ago
8

One car travels 45 mph and the other one travels 52 mph if they start from the same place at the same time traveling in the same

direction after how many hours will the faster car P 42 miles ahead of a slower one
Mathematics
1 answer:
Alinara [238K]3 years ago
4 0

Answer:

the faster car will be 7 miles ahead the slower car

Step-by-step explanation:

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What number is 1/10 great as 7962
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What you have to do is divide the number by one tenth

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The 90% confidence interval for the mean one-way commuting time in New York City is
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Answer:

95% provides more information

Step-by-step explanation:

The confidence interval is obtained by using the relation :

Xbar ± Zcritical * σ/√n

(Xbar - (Zcritical * σ/√n)) = 5.22 - - - (1)

(Xbar + (Zcritical * σ/√n)) = 5.98 - - (2)

Adding (1) and (2)

2xbar = 5.22 + 5.98

2xbar = 11.2

xbar = 11.2 / 2 = 5.6

Margin of Error :

Xbar - lower C.I = Zcritical * σ/√n

Zcritical at 90% = 1.645

5.6 - 5.22 = 1.645 * (σ/√n)

0.38 = 1.645 * (σ/√n)

(σ/√n) = 0.38 / 1.645 = 0.231

Therefore, using the se parameters to construct at 95%

Zcritical at 95% = 1.96

Margin of Error = Zcritical * σ/√n

Margin of Error = 1.96 * 0.231 = 0.45276

C.I = xbar ± margin of error

C. I = 5.6 ± 0.45276

C.I = (5.6 - 0.45276) ; (5.6 + 0.45276)

C. I = (5.147 ; 6.053)

Hence, 95% confidence interval provides more information as it is wider.

3 0
3 years ago
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