What is 5.63×10−6in decimal form?a. 0.00000563 b. 0.000000563 c.5,630,000d. 56,300,000

1 answer:

3 0

$5.63 \times {10}^{ - 6}$

To convert into decimal, move the decimal to the left by 6 positions.

It will be 0.00000563

Answer is A.

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Andrew thinks that people living in a rural environment have a healthier lifestyle than other people. He believes the average li

igomit [66]

Answer:

Yes, it does.

Step-by-step explanation:

Since the data is approximately Normally distributed and the sample is less than 30, we will be using the Student's t Distribution.

$\bf H_0$ : The life expectancy of people living in rural Idaho is 77 years

$\bf H_a$ : The life expectancy of people living in rural Idaho is greater than 77 years.

So, this is a right-tailed test.

Our t-statistic is given by

$\bf t=\frac{\bar x-\mu}{s/\sqrt{n}}$

where

$\bf \bar x$ = 79.14 is the mean of the sample

$\bf \mu$ = 77 is the mean of the null hypothesis

s = 2.48 is the sample standard deviation

n = 11 is the sample size

Computing our t-statistic we get

$\bf t=\frac{79.14-77}{2.48/\sqrt{11}}=2.862$

Now, we obtain the critical upper value $\bf t^*$ for a right-tailed test hypothesis corresponding to a 10% level of significance associated with the Student's t Distribution with 10 degrees of freedom (sample size-1). This is a value $\bf t^*$ such that the area under the t distribution to the left of $\bf t^*$ equals 10% = 0.01

We can do it either by looking up a table or a spreadsheet.

In Excel use

TINV(0.2,10)

In OpenOffice Calc use

TINV(0.2;10)

and we would get $\bf t^*$ = 1.3722

Since our t-statistic is greater than $\bf t^*$ we can reject the null hypothesis and say this sample provide evidence that people living in rural Idaho communities live longer than 77 years.

7 0

3 years ago

1/5(g - 10) I need a answer please help fast

denpristay [2]

Answer: $\frac{1}{5}g - 2$

Explanation:

Multiply the outer term $\frac{1}{5}$ by each term inside the parenthesis. This is an example of the distributive property. Note that $\frac{1}{5}$ times 10 is equal to 2, because $\frac{1}{5}*10 = \frac{10}{5} = 2$ .