F(x)=6-6x g(x)=-3x+6 Find f+g

The staff at a company went from 40 to 29 employees. what is the percent decrease in staff

topjm [15]

Number of employees outside of company=40-29=11

we can calculate the percent decrease in staff by the rule of 3

40 employees-----------------100%
11 employees---------------- x

x=(11 employees*100%) / 40 employees=27.5%

The percent decrease in staff was: 27.5%

5 0

2 years ago

Two different samples will be taken from the same population of test scores where the population mean and standard deviation are

Alenkinab [10]

Answer:

The sample consisting of 64 data values would give a greater precision.

Step-by-step explanation:

The width of a (1 - α)% confidence interval for population mean μ is:

$\text{Width}=2\cdot z_{\alpha/2}\cdot \frac{\sigma}{\sqrt{n}}$

So, from the formula of the width of the interval it is clear that the width is inversely proportion to the sample size (n).

That is, as the sample size increases the interval width would decrease and as the sample size decreases the interval width would increase.

Here it is provided that two different samples will be taken from the same population of test scores and a 95% confidence interval will be constructed for each sample to estimate the population mean.

The two sample sizes are:

n₁ = 25

n₂ = 64

The 95% confidence interval constructed using the sample of 64 values will have a smaller width than the the one constructed using the sample of 25 values.

Width for n = 25:

$\text{Width}=2\cdot z_{\alpha/2}\cdot \frac{\sigma}{\sqrt{25}}=\frac{1}{5}\cdot [2\cdot z_{\alpha/2}\cdot \sigma]$

Width for n = 64:

$\text{Width}=2\cdot z_{\alpha/2}\cdot \frac{\sigma}{\sqrt{64}}=\frac{1}{8}\cdot [2\cdot z_{\alpha/2}\cdot \sigma]$

Thus, the sample consisting of 64 data values would give a greater precision

5 0

2 years ago

Read 2 more answers

Solve for z a(t+z)=45z+67

ladessa [460]

Solve for z a(t+z)=45z+67
1. Expand
$at+az=45z+67$

2. Subtract $at$ from both sides
$az=45z+67-at$

3. Subtract 45z from both sides
$az-45z=67-at$

4. Factor out the common term z
$z(a-45)=67-at$

5. Divide both sides by a - 45
$z= \frac{67-at}{ya-45}$

Answer: $z= \frac{67-at}{a-45}$