1. Graph the normal quantile plot and add a line: 2. Does the data appear to...

Question

Question

A random sample of 25 college students aged 18 to 24 years was obtained, and the number of hours of TV watched last week was

1. Graph the normal quantile plot and add a line:

2. Does the data appear to have come from a normal
distribution? Why/why not?

3. Find the probability for a standard normal distribution and graph it.
• Graph P(z < 1).

4. Find P(z < 1) for a standard normal curve:

Answer 1

Answer #1

x <- c(36.1,30.5,2.9,17.5,21,23.5,25.6,16,28.9,29.6,7.8,20.4,33.8,26.8,
0,9.9,25.8,19.5,19.1,18.5,22.9,9.7,39.2,19,8.6)

qqnorm(x)
qqline(x)

寸髦》引》刳 -2 Theoretical Quantiles

2)

the data appears to have come from a normal distribution

this is because most of point lie near the line

Answer 2

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