In a study last year, it was claimed that 34.3% of students exercise more than 20 minutes at least 5 days a week. Using this year's survey results as sample data, can you conclude that the population proportion has increased from 34.3%? Use a significance level of 5%.

a) Write the null and alternative hypotheses.

b) Check whether ?? ? 5 and ?? ? 5. Show your calculations.

c) Calculate the test statistic by hand. Show your work, including all calculations.

d) Find the ?-value by writing what probability is being computed.

f) Based on the sample data, can you conclude that the proportion of students who feel stressed have increased?