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Licemer1 [7]
3 years ago
15

Help me plz i need help

Mathematics
1 answer:
bulgar [2K]3 years ago
4 0
The first one is the first choice
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The authors of a certain paper describe a study to evaluate the effect of mobile phone use by taxi drivers in Greece. Fifty taxi
ladessa [460]

Answer:

The answer is below

Step-by-step explanation:

The mean (μ) = 3.7 m, standard deviation (σ) = 1.17 m, confidence (C) = 95% = 0.95, sample size (n) = 50

a) α = 1 - C = 1 - 0.95 = 0.05

α/2 = 0.05/2 = 0.025

The z score of α/2 is the same as the z score of 0.475 (0.5 - 0.025) which is 1.96. Hence:

The margin of error (E) = z_\frac{\alpha}{2} *\frac{\sigma}{\sqrt{n}  }=1.96*\frac{1.17}{\sqrt{50} } =0.32

The confidence interval = μ ± E = 3.7 ± 0.32 = (3.38, 4.02)

b) This means that we are 95% sure that any distance between the taxi and the lead car is between 3.38 m and 4.02 m

6 0
3 years ago
Steve earns $0.58 for each unit of work. one week he produced 532 units. how much did he earn that week?
masya89 [10]
He earned $308.56. Because 532 times $.58 equals $308.56
6 0
3 years ago
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Denita has 4 coins. If Denita flips all the coins at once, how many outcomes are in the sample space?
Gennadij [26K]
There are 16 outcomes. You’d multiply the number of coins there are (4) by itself (4) and get 16.
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There are 30 students in a class. The teacher will choose 2 students at random to represent the class at an assembly. How many g
Sunny_sXe [5.5K]
30/2=15
15 groups of 2 can be chosen.

8 0
3 years ago
How to solve 32-2(23-16)+4*4*3
scoundrel [369]

Answer:

66

Step-by-step explanation:

Order of operations:

32-2(7)+4*4*3

32-14+48

66

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3 years ago
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