Calculate weighted average 80,90,70 weights 3,2,5
Linear regression, confidence intervals, expected value, and covariance.
Data
Answer
77
To find the weighted mean, multiply each value by its weight, sum the products, and divide by the total weight.
Step 1 — Multiply each value by its weight
80 × 3 = 240
90 × 2 = 180
70 × 5 = 350
Step 2 — Sum the products and the weights
Sum of (value × weight) = 770
Sum of weights = 10
Step 3 — Divide
Weighted mean = 770 ÷ 10 = 77
Weighted mean = 77
How to calculate weighted average 80,90,70 weights 3,2,5
To compute weighted average 80,90,70 weights 3,2,5, apply the statistical formula to the data points.
This is a statistical analysis — advanced statistics includes regression, hypothesis testing, and measures of association.
Frequently asked questions
What is the answer to weighted average 80,90,70 weights 3,2,5?
The answer is 77.
What method is used?
Linear regression finds y = mx + b that best fits the data. R² measures how well the line fits.
More advanced statistics calculator problems
linear regression (1,2)(2,4)(3,5)(4,4)(5,5)
linear regression (1,1)(2,3)(3,2)(4,4)(5,5)
expected value 1:0.2, 2:0.3, 3:0.5
covariance (1,2,3,4,5)(2,4,5,4,5)
weighted average 80,90,70 weights 3,2,5
confidence interval mean 50 std 10 n 30
Similar problems
linear regression (1,2)(2,4)(3,5)(4,4)(5,5)
expected value 1:0.2, 2:0.3, 3:0.5
covariance (1,2,3)(4,5,6)
Related calculators