Final answer:
The People's Choice Awards are not determined by a panel of voting members but instead by the general public through online voting. Option number b is correct.
Step-by-step explanation:
The question 'Which awards are not determined by a panel of voting members?' asks us to identify which out of the given options involves a selection process not managed by a traditional voting panel.
Here, the People's Choice Awards stands out because unlike the Grammy Awards, Academy Awards (Oscars), and Nobel Prizes, the winners of the People's Choice Awards are determined by the general public through online voting rather than a panel of experts or industry insiders. This direct public involvement is what differentiates it from the other awards mentioned.