道练习

Output of svyby()

Both out and NHANESraw contain columns called SleepHrsNight and Gender. Print out and select(NHANESraw, SleepHrsNight, Gender).

Which of the following statements is incorrect?

50 XP

The most common response among surveyed males was 6.879 hours of sleep.

The first row in NHANESraw is a male who reported he sleeps 4 hrs/night.

The estimated average sleep hours for females (>12 yrs) is 6.98.

The standard error for the estimated average sleep hours for males (>12 yrs) is 0.0195.