a bicycle shop advertised all mountain bikes priced at a 1/3 discount.What is the amount of the discount if the bicycle original
2 answers:
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The key here is to not worry too much and just follow PEMDAS.
Here we have the expression . Following PEMDAS, we complete the expression inside the parentheses first, or
. This gives us
or just
Hope this helps.
Answer:
Step-by-step explanation:
The confidence interval for the population mean x can be calculated as:
Where x' is the sample mean, s is the population standard deviation, n is the sample size and is the z-score that let a proportion of
on the right tail.
is calculated as: 100%-99%=1%
So,
Finally, replacing the values of x' by 308, s by 17, n by 15 and by 2.576, we get that the confidence interval is: