The following represent statistics of weekly salaries at the Harper Publishing Company.
Mean = $470 Median = $475 Mode = $460 Standard deviation = $30
First Quartile = $450 Third Quartile = $485 79th Percentile = $545 P67 = $483

1) The most common salary is $460.

2) The salary that half of the employees surpassed is $475

3) The percentage of employees with salaries below $485 is 75%

4) 75% of the employees have a salary above $450.

5) The salary that stands 3 standard deviations below the mean is $380

6) 33% of the employees have a salary above $483.

7) The salary that stands 2 standard deviations above the mean is $530

Step-by-step explanation:

Hello!

1. What is the most common salary?

The measure that allows you to know which one is the most common value (i.e. the most frequent/observed number) in a data set is the mode. According to the given statistics, the most common salary is $460.

2. What salary did half the employees surpass?

The measure that divides the sample in exactly a half (bottom 50% from the top 50%) is the median. In this example the salary that half of the employees surpassed is $475.

3. About what percent of employee's salaries is below $485?

As you can see in the descriptive statistics, the third quartile (Q₃) is $485.

The Q₃ is the value that divides the bottom 75% of the sample from the top 25%. So the percentage of employees with salaries below $485 is 75%

4. What percent of the employees are above $450?

The first quartile (Q₁) is the value that separates the bottom 25% of the sample from the top 75%. In this case Q₁= $450, which means that 75% of the employees have a salary above $450.

5. What salary is 3 standard deviations below the mean?

The mean is $ 470 and the standard deviation is $30, the salary that stands 3 standard deviations below the mean is

X[bar]-3S= $470-3*$30= $380

6. About what percent of employee's salaries is above $483?

P₆₇= $483, this value is the 67th percentile and means that 67% of the employees have a salary below $483.

If 67% are below $483, then 100 - 67= 33% of the employees have a salary above $483.

7. What salary is 2 standard deviations above the mean?

The mean is $ 470 and the standard deviation is $30, the salary that stands 2 standard deviations above the mean is

X[bar]+2S= $470+2*$30= $530

I hope you have a SUPER day!

hey there!

if she's saving for six months, let's divide the total number we need for the trip by six, dividing it into the amount that needs to be saved for each month.

500 ÷ 6 =

she needs to save at least this amount each month, so we should use this symbol: ≥

let x be the amount she saves each month.

your final answer is x ≥

hope this !