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Stock-Based Compensation (Tables)
6 Months Ended
Jul. 02, 2023
Schedule of Estimated Fair Value of TSR Performance-Based Restricted Stock Unit Awards Assumptions The fair value was estimated using the Monte Carlo simulation model with the following assumptions:
 
 
  
For the Six Months

Ended
 
 
  
July 2,
 
 
July 3,
 
 
  
2023
 
 
2022
 
 
  
 
 
 
 
 
Risk-free interest rate
     3.9     1.4
Teradyne volatility-historical
     50.2     47.1
NYSE Composite Index volatility-historical
     24.8     22.7
Dividend yield
     0.4     0.4
Fair Value of Stock Options Using Assumptions
The fair value of stock options was estimated using the Black-Scholes option-pricing model with the following assumptions:

 
 
  
For the Six Months

Ended
 
 
  
July 2,
 
 
July 3,
 
 
  
2023
 
 
2022
 
 
  
 
 
 
 
 
Expected life (years)
     4.0       4.0  
Risk-free interest rate
     3.7     1.6
Volatility-historical
     46.7     43.7
Dividend yield
     0.4     0.4