A random sample of 50 students at a large high school resulted in a 95 percent confidence interval for the mean number of hours per day of (6.73, 7.67). Which of the following statements best summarizes the meaning of this confidence level? O About 95% of all random samples of 50 students from this population would result in a 95% confidence interval that covered the population mean number of hours of sleep per day. 95% of the studets in the survey reported sleeping between 6.73 and 7.67 hours per day. O About 95% of all random samples of 50 students from this population would result in a 95% confidence interval of (6.73, 7.67). A student selected at random from this population sleeps between 6.73 and 7.67 hours per day for 95% of the time. O About 95% of all random samples of 50 students from this population would result in a 95% confidence interval that covered the sample mean number of hours of sleep per day. O 95% of the students in this high school slept between 6.73 and 7.67 hours per day

54T 6. C3C

A survey was given to 357 people asking whether people like dogs and/or cats. 172 said they like dogs 169 said they like cats 86 sald they don't like cats or dogs. How many said they liked both cats and dogs? people liked both cats and dogs.

5 9.

M-Buhen M

12.6

6