The phrasing "nine times out of ten" means 9/10 = 0.90 = 90% is the confidence level. We're confident 90% of the time that the confidence interval captures the population parameter we're after (in this case mu = population mean)
The portion "have an average score within 5% of 75%" means that 75% = 0.75 is the center of the confidence interval, and it goes as low as 0.75 - 0.05 = 0.70 and as high as 0.75 + 0.05 = 0.80
This confidence interval is from 70% to 80%, meaning that nine times out of ten, we're confident that the average score is between 70% and 80%
We write the confidence interval as (0.70, 0.80). It's common to use the notation (L, U) to indicate the lower (L) and upper (U) boundaries. You might see the notation in the form L < mu < U. If so, then it would be 0.70 < mu < 0.80; either way they mean the same thing.
The margin of error is 0.05 as its the 5% radius of the interval. It tells us how far the most distant score is from the center (75%)
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In summary, we have these answers
- confidence level = 90%
- margin of error = 5% = 0.05
- confidence interval = (0.70, 0.80)
- interpretation = We're 90% confident that the average exam score is between 0.70 and 0.80
Parentheses seventy - one plus twenty - nine parentheses times twenty - six
Answer:
what is the question
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i just saw is
solve the following: Express your answer in simplest radical form
Answer:
4 White, 3 Blue
Step-by-step explanation:
5w+2b=26
Closest five multiple that leaves an even remainder is 4.
5×4=20
26-20=6÷2=3
Answer:
The given multiplied expression is
Step-by-step explanation:
Given expression is 
To find the multiplication of the given expression :
By using the distributive property to solve the given expression as below
( by using the property 
)
Adding the like terms in the above expression we get
Therefore
Therefore the given multiplied expression is
