Arecent national survey found that high school students watched an average (mean) of 6.8 movies per month with a population standard deviation of 1.8. the distribution of number of movies watched per month follows the normal distribution. a random sample of 36 college students revealed that the mean number of movies watched last month was 6.2. at the 0.05 significance level, can we conclude that college students watch fewer movies a month than high school students?

How many zeros does the function f(x)=4x3-x2+1 have

The height of a birch tree, f(x), in inches, after x months is shown in the graph below. how much does the birch tree grow per month, and what will be the height of the birch tree after 10 months? a. the birch tree grows 1 inch per month. the height of the birch tree will be 16 inches after 10 months. b. the birch tree grows 2 inches per month. the height of the birch tree will be 26 inches after 10 months. c. the birch tree grows 3 inches per month. the height of the birch tree will be 36 inches after 10 months. d. the birch tree grows 2 inches per month. the height of the birch tree will be 24 inches after 10 months.

If the alternate hypothesis of an experiment is “the true mean height of the giraffes is more than 15 feet” what is the null hypothesis?