Answer:
Step-by-step explanation:
Given that there are 20 non ionized containers and 73 ionized containers
Two samples are drawn without replacement
a) the probability that the first one selected is not ionized=
b) the probability that the second one selected is not ionized given that the first one was ionized
= When first one was ionized we got left over as 20 and 72
Hence = 
c) If with replacement left over 20 and 73 and hence prob = 0.215 as in part a
d) the probability that both are ionized=
Answer:yes
Step-by-step explanation:
Yes
Answer:
And we can find this probability using the z score table or excel:
So then we can conclude that the proportion of fish that are safe to eat is about 0.734
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Solution to the problem
Let X the random variable that represent the concentrations of mercury in individual fish of a population, and for this case we know the distribution for X is given by:
Where 
and 
We are interested on this probability
And the best way to solve this problem is using the normal standard distribution and the z score given by:
If we apply this formula to our probability we got this:
And we can find this probability using the z score table or excel:
So then we can conclude that the proportion of fish that are safe to eat is about 0.734
Answer:
B. F(x) = 
Step-by-step explanation:
The -3 being multiplied to 
causes the function to narrow (number is greater than 1) and flip over the x-axis (number is negative). The +3 in shifts the function to the left 3 units. The other +3 shifts the function 3 units upwards.
Decimal: 0.375
Percent: 37.5%
Explanation: To find the decimal version of 3/8, you just divide the numerator and the denominator. Ex. 3 ÷ 8=0.375
For the percentage, you can multiply the decimal version by 100 to get the percentage. Ex. 0.375x100=37.5%
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