Doing traditional hypothesis testing

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Traditional Proportion Hypothesis Testing
I make the claim that " $75%$ $75$ of people like statistics." If 50 people were sampled and it was found that $64%$ $64$ of them like statistics then with a significance level of $\alpha=$ $α =$ 0.05 can my claim be proven to be false?
Thomas is shopping for a used car. He is fairly unconcerned with what car he buys and makes the claim that "[he] likes most cars". If he checks out 40 cars and he likes 30 of them, with a 90% confidence level is his claim true?
Traditional Mean Hypothesis Testing
Daisy is brewing a batch of Kombucha. She made a total of 20 jars, with a standard deviation of $\sigma=2$ $σ = 2$ $oz$ $oz$ . If she samples 5 jars and finds that the mean amount of liquid in these 5 jars is $\overline{x} =27$ $\overline{x} = 27$ $oz$ $oz$ , then with 99% confidence what could be said about the claim that "she has on average less than 30 ounces per jar".

Traditional hypothesis testing