Complete the chart to find the mean, variance and standard deviation. Remember to use commas and round numbers to the nearest tenth.
Х
X-X
IX-X)²
1. 45
= -357.5
The mean is
2. 340
=-62.5
The median is
3. 400
= -2.5
The variance is
4. 825
= 422.5 =
The standard deviation is
ΣΧ=
(X-X)2 = 310,225.2 n=

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent ?

How can (square root of 25) ^2 be rewritten?

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?