Are the TV habits of Americans changing? In 2015, the Bureau of Labor Statistics found the average number of TV hours watched per day was 4.8. In 2017, the Nielsen rating company conducted a survey and computed the following 95% confidence interval: (3.54, 4.66).

(a) What should Nielsen conclude for α = 0.05?
There is— insufficient sufficient evidence to conclude the average number of TV hours watched per day has— changed stayed the same .

(b) Nielsen considers making 90% and 99% confidence intervals for their test results. For which of these intervals could they claim the average number of TV hours watched per day has changed? (Choose TWO answers below.)

For the 90% interval: without actually computing the interval, it can’t be known if they could conclude the average number of TV hours watched per day has changed.
For the 90% interval: they could conclude the average number of TV hours watched per day has changed without even computing it.
For the 99% interval: without actually computing the interval, it can’t be known if they could conclude the average number of TV hours watched per day has changed.
For the 99% interval: they could conclude the average number of TV hours watched per day has changed without even computing it.