3/4 ÷ - 11/4
3/4 × -4/11
= -3/11
Answer:
The upper bound is 399.5
Step-by-step explanation:
Let's start by calculating the mean value of the distribution as the addition of all values given divided by 12:
Average = 289.75.
If the standard deviation is 56, then the upper bound in 95% the confidence interval for the mean price of the phones is going to be given by the mean value added to 56 times 1.96 (since 95% of the population is withing 1.96 times the standard deviation)
That is: 289.75 + 56 * 1.96 = 399.51
which rounded to one decimal place gives: 399.5
36 perches altogether.
I hope you like this answer, please Brainliest me, and have a great day! :D
Answer: $2203.74
Step-by-step explanation:
