86 3. A certain brand of tissues has 60 tissues in a standard box because the manufacturers believe that this is the average number of times people blow their nose during a cold. A research of the company checking on the validity of this claim, asked a random sample of 100 people to count the number of times they blow their nose during a cold. The mean of the sample was 57 and the standard deviation was 16. Do these data support the company's belief? Should the company continue to put 60 tissues in a box? Use a two- tailed hypothesis testing procedure with a of .05. Carry out all nine steps of the hypothesis testing procedure. 4. ACT composite scores are normally distributed with a u = 21. A sample of 25 students is randomly selected from a local high school with an X = 23 and s = 5.2. Do the data support the claim that the average ACT composite score of students from this high school is different than 21 on the ACT composite score, using a = .05