Total jelly beans = 6 + 4 + 4 = 14
Total blue jelly beans = 4
Probability = 4/14 x 3/13 = 6/91
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Answer: The probability of choosing two blue jelly is 6/91.
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Answer: 7218
Step-by-step explanation: i mean you just add them up chief think of a number line that whole space between them
Answer:
$13.5
Step-by-step explanation:
cost of 1 text message= $1.80÷12 =$0.15
cost of 90 messages = $0.15×90 = $13.5
Answer:
The confidence interval is , in which n is the size of the sample.
Step-by-step explanation:
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Z-table as such z has a p-value of .
That is z with a pvalue of , so Z = 1.96.
Now, find the margin of error M as such
In which is the standard deviation of the population and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is
The upper end of the interval is the sample mean added to M. So it is
The confidence interval is , in which n is the size of the sample.