次表で与えられた売上高（単位：億円）と利益（単位：億円）の回帰関係と決 定係数を求める。売上高を 、利益を としたとき、 ∑ = 1,921、∑ = 419、∑ ^2= 569,279、∑ ^2 = 29,935、∑ = 129,897
となる。
年 度 2006 2007 2008 2009 2010 2011 2012 2013 2014
売上高 54 68 88 145 195 240 302 379 450
利 益 10 11 16 29 32 50 73 90 108
(1) このデータの正規方程式を示しなさい。
(2) 正規方程式を解いた結果の回帰式は = −6.80 + 0.25 となります。これを用いて決定係数は ^2 = 0.97 であることを示しなさい。

Who needs to approve a change before it is initiated? (select two.) -change board -client or end user -ceo -personnel manager -project manager

Write a program that uses a random number generator to generate a two digit positive integer and allows the user to perform one or more of the following operations: a. double the number. b. reverse the digits of the number. c. raise the number to the power of 2, 3, or 4. d. sum the digits of the number. e. if the number is a two-digit number, then raise the first digit to the power of the second digit. f. if the number is a three-digit number and the last digit is less than or equal to 4, then raise the first two digits to the power of the last digit. after performing an operation if the number is less than 10, add 10 to the number. also, after each operation determine if the number is prime. each successive operation should be performed on the number generated by the last operation. your program should not contain any global variables and each of these operations must be implemented by a separate function. also, your program should be menu driven. 7. (fraction calculator) write a program that

Fall protection, confined space entry procedures, controlled noise levels, and protection from chemical hazards are some of the things that contribute to a safe and