To solve for proportion we make use of the z statistic.
The procedure is to solve for the value of the z score and then locate for the
proportion using the standard distribution tables. The formula for z score is:
z = (X – μ) / σ
where X is the sample value, μ is the mean value and σ is
the standard deviation
when X = 70
z1 = (70 – 100) / 15 = -2
Using the standard distribution tables, proportion is P1
= 0.0228
when X = 130
z2 = (130 – 100) /15 = 2
Using the standard distribution tables, proportion is P2
= 0.9772
Therefore the proportion between X of 70 and 130 is:
P (70<X<130) = P2 – P1
P (70<X<130) = 0.9772 - 0.0228
P (70<X<130) = 0.9544
Therefore 0.9544 or 95.44% of the test takers scored
between 70 and 130.
Answer:
1,260
Step-by-step explanation:
6x3=18 7000÷18=1,260
Answer:
yes
Step-by-step explanation:
Answer:
Step-by-step explanation:
If the spending limit is $ 40 and making each beads costs $ 0.25, then the amount of accounts you must do multiplied by the manufacturing cost should not exceed $ 40.
Then the inequation that this restriction would represent is:
Where x is the number of beads made.
This could also be written more specifically:
Therefore the number of beads must be less than or equal to 160
Answer:
Explanation:
Convert 
to a mixed number, then set 
up next to it.
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