A hypothesis will be used to test that a population mean equals 13 against the alternative that the population mean does not equal 13 with known variance . What are the critical values for the test statistic for the significance level of 0.09

Mahnoor randomly selects times to walk into a local restaurant and observe the type of music being played she found that the restaurant was playing country 11 times rock & roll 17 times and blues 8 times use the observed frequencies to create a probability model for the type of music the restaurant is playing the next time mahnoor walks in.