In a simple random sample of size 16, with a standard deviation equal to 32, and a mean of 520. From these data, can it be concluded, with an alpha of 0.05, that the population mean is greater than 516?

3. A Thai toy manufacturer claims that less than 10% of toy bears made to talk are defective. Four hundred of these toys were randomly tested and 50 were found to be defective. Test the manufacturer's claim with an alpha of 1%.