2 years ago

Can you guys help me out with this? Thanks! <3

Mathematics

1 answer:

Tamiku [17]2 years ago

6 0

Answer:

Step-by-step explanation:

1.Jenna's interest was $480

2. 7 years Mike has saved & eared interest of $280.

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Leni [432]

Answer:

The value of test statistic is -4.1247

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = $3.26 a gallon

Sample mean, $\bar{x}$ = $3.19 a gallon

Sample size, n = 32

Sample standard deviation, σ = $0.096

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 3.26\text{ dollars a gallon}\\H_A: \mu < 3.26\text{ dollars a gallon}$

We use one-tailed t test to perform this hypothesis.

Formula:

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

Putting all the values, we have

$t_{stat} = \displaystyle\frac{3.19 - 3.26}{\frac{0.096}{\sqrt{32}} } = -4.1247$

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F = 1.8C + 32
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F = 180 + 32
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X + (-9) + 9 = 8 solve the equation using mental math

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Answer:

X=8 simplify equation

Step-by-step explanation:

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