Answer:
46
Step-by-step explanation:
use a calculator online
Answer:
Step-by-step explanation:
Given
---- the average
-- standard deviation
Required
The 1st to 3rd quartile
Since the distribution is normal, then:
i.e.
So, we have:
Rewrite Median as Q2
To solve for Q1 and Q3, we use the following formula
Multiply both sides by 2
Substitute
Also, we have:
----- quadrants are equidistant
Rewrite as:
Substitute:
Make Q3 the subject
Substitute in
Collect like terms
Divide by 2
Substitute in
Answer:
y = 28
Step-by-step explanation:
Given that y varies directly as x and inversely as z then the equation relating them is
y = ← k is the constant of variation
To find k use the condition y = 4 when x = 2 and z = 7, then
4 = ( multiply both sides by 7 )
28 = 2k ( divide both sides by 2 )
14 = k
y = ← equation of variation
When x = 6 and z = 3 , then
y = = 14 × 2 = 28