jawaher95 jawaher95

22-11-2020
Mathematics

contestada

What is the data value X if its z value is
-2 ,the mean is 27
and the standard deviation is 4

Respuesta :

miaisalpha miaisalpha

22-11-2020

The formula for this type of question is z=x-u/y
z=-2 (z-value)
u = 27 (mean)
y = 4 (standard deviation)

Therefore -2=x-27/4
You now figure this out like a normal equation

4x-2=4 X x-27/4
-8+27= x-27+27
19=x

Therefore the data value of x is 19

Answer Link

Otras preguntas

Loftus used her research to prove that __________. A. memories of childhood trauma are usually true B. adults’ memories are concrete and rigid C. children have

5 less than the product of 8 and a number

A drawer has some red, green, and blue marbles. There are 33 marbles in all. Thete are 4 times as many red marbles as green marbles. There are half as many blu

. The value of Maggie's car decreased by 10% since last year, when she bought it. If the car is now worth $15,000.00, how much was the car worth when she bought

When the Nile flooded, what did it leave behind?

The general process in which molecules move from an area of higher concentration to an area of lower concentration is called ____________. A. osmosis B. diffusi

Who was the Hellenistic (Greek) mathematician who invented the compound pulley and is known for his work with the laws governing simple machines? A. Pythagoras

Mrs. Noah'a bill, before tax, is $50. The sales tax rate is 3%. Mrs. Noah decides to leave a 2% tip for the gate keeper based on the pre-tax amount. How much wi

130% of the sum of 7 and a number n is equal to 91.

5 less than the product of 8 and a number