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Pepsi [2]
2 years ago
13

sing traditional methods, it takes 108108 hours to receive a basic driving license. A new license training method using Computer

Aided Instruction (CAI) has been proposed. A researcher used the technique with 110110 students and observed that they had a mean of 107107 hours. Assume the standard deviation is known to be 77. A level of significance of 0.020.02 will be used to determine if the technique performs differently than the traditional method. Find the value of the test statistic. Round your answer to 2 decimal places. Enter the value of the test statistic.
Mathematics
1 answer:
solniwko [45]2 years ago
8 0

Answer:

z_{stat} = -1.50            

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 108

Sample mean, \bar{x} = 107

Sample size, n = 110

Alpha, α = 0.02

Population standard deviation, σ = 7

Formula:

z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }

Putting all the values, we have

z_{stat} = \displaystyle\frac{107 - 108}{\frac{7}{\sqrt{110}} } = -1.50

The test statistic is -1.50

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Alisiya [41]

Answer:

x > 3

Step-by-step explanation:

1) Add 6 to both sides.

9x > 21 + 6

2) Simplify 21 + 6 to 27.

9x > 27

3) Divide both sides by 9.

x >  \frac{27}{9}

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2 years ago
How can numbers be expressed, ordered, and compared
fiasKO [112]
Compare or order the digits that are different, Write > or <. or use a number line <span>44 < 72<span>
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3 years ago
Is 90 ten times as much as 0.9
Evgen [1.6K]
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3 years ago
Y = 7/8u + 9, solve for u
vivado [14]

Answer:

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Step-by-step explanation:

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hope this helps

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