Consider the following data and corresponding weights. xi Weight (wi) 3.2 6 3.0 3 2.5 2 4.0 8 (a) Compute the weighted mean. (Round your answer to three decimal places.) (b) Compute the sample mean of the four data values without weighting. Note the difference in the results provided by the two computations.

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

What is the circumference of the pie

In the diagram, a building cast a 35-ft shadow and a flagpole casts an 8-ft shadow. if the the flagpole is 18 ft tall, how tall is the building? round the the nearest tenth.