In: Statistics and Probability

A recent national survey found that high school students watched an average (mean) of 6.6 DVDs per month with a population standard deviation of 0.90 hour. The distribution of DVDs watched per month follows the normal distribution. A random sample of 43 college students revealed that the mean number of DVDs watched last month was 6.10. At the 0.05 significance level, can we conclude that college students watch fewer DVDs a month than high school students?

d. |
What is your decision regarding H?_{0} |

Reject *H _{0}*

Cannot reject *H _{0}*

Solution :

This is the left tailed test .

The null and alternative hypothesis is ,

H_{0} :
= 6.6

H_{a} :
< 6.6

Test statistic = z

= ( - ) / / n

= (6.10 - 6.6) / 0.90 / 43

Test statistic = -3.64

P(z < -3.64) = 0.0001

P-value = 0.0001

= 0.05

P-value <

Reject the null hypothesis (H0

A recent national survey found that high school students watched
an average (mean) of 6.6 DVDs per month with a population standard
deviation of 0.90 hour. The distribution of DVDs watched per month
follows the normal distribution. A random sample of 43 college
students revealed that the mean number of DVDs watched last month
was 6.10. At the 0.05 significance level, can we conclude that
college students watch fewer DVDs a month than high school
students?
b.
State the decision...

A recent national survey found that high school students watched
an average (mean) of 7.2 DVDs per month with a population standard
deviation of 0.90 hour. The distribution of DVDs watched per month
follows the normal distribution. A random sample of 35 college
students revealed that the mean number of DVDs watched last month
was 6.20. At the 0.05 significance level, can we conclude that
college students watch fewer DVDs a month than high school
students?
e.
What is the...

A recent national survey found that high school students watched
an average of 6.8 DVDs per month with a population standard
deviation of 0.5 DVDs. The distribution follows the normal
distribution. A random sample of 36 college students revealed that
the mean number of DVDs watch last month was 6.2. At the .05
significance level, can we conclude that college students watch
fewer DVDs a month than high school students?
a. What is the null and alternative hypotheses?
b. Is...

A recent national survey found that high school students watched
an average (mean) of 6.5 movies per month with a population
standard deviation of 0.6. The distribution of number of movies
watched per month follows the normal distribution. A random sample
of 33 college students revealed that the mean number of movies
watched last month was 5.8. At the 0.05 significance level, can we
conclude that college students watch fewer movies a month than high
school students?
State the null...

A recent national survey found that high school students watched
an average (mean) of 7.2 movies per month with a population
standard deviation of 0.7. The distribution of number of movies
watched per month follows the normal distribution. A random sample
of 47 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?
State the null...

Question 1
A recent national survey found that high school students watched
an average of 6.8 videos per month. A random sample of 36 high
school students revealed that the mean number of vidoes watched
last month was 6.2. From past experience it is known that the
population standard deviation of the number of vidoes watched by
high school students is 0.5. At the 0.05 level of signifiance, can
we conclude that high school students are watching fewer
vidoes?
(a)...

I need the CORRECT answer!!!
A recent national survey found that high school students watched
an average (mean) of 7.4 movies per month with a population
standard deviation of 0.9. The distribution of number of movies
watched per month follows the normal distribution. A random sample
of 34 college students revealed that the mean number of movies
watched last month was 6.9. At the 0.05 significance level, can we
conclude that college students watch fewer movies a month than high...

In a recent survey of high school students, it was found that
the amount of time spent on reading books per week was normally
distributed with a mean of 32 minutes. Assume the distribution of
weekly reading time follows the normal distribution with a
population standard deviation of 2 minutes. Suppose we select a
sample of 20 high school students.
a. What is the standard error of the mean time?
Answer
b. What percent of the sample means will be...

A recent national survey found that parents read an average
(mean) of 10 books per month to their children under five years
old. The population standard deviation is 5. The distribution of
books read per month follows the normal distribution. A random
sample of 25 households revealed that the mean number of books read
last month was 12. At the .01 significance level, can we conclude
that parents read more than the average number of books to their
children?
What...

In a recent survey of county high school students, 100 males and
100 females, 66 of the male students and 47 of the female students
sampled admitted that they consumed alcohol on a regular basis.
Find a 90% confidence interval for the difference between the
proportion of male and female students that consume alcohol on a
regular basis. Can you draw any conclusions from the confidence
interval?
For the test of significance questions, clearly indicate each of
the formal steps...

ADVERTISEMENT

ADVERTISEMENT

Latest Questions

- Taylor’s “Libertarianism”
- Given a system with 4M bytes of address space per process, 64M bytes of physical memory,...
- Explain in your own words the requirements an indeterminate structure should satisfy and name the methods...
- Let P2 be the vector space of all polynomials of degree less than or equal to...
- Develop a python program to create a quiz with limited time and attempts!!! Add comments and...
- Quantitative noninvasive techniques are needed for routinely assessing symptoms of peripheral neuropathies, such as carpal tunnel...
- The Blending Department of Luongo Company has the following cost and production data for the month...

ADVERTISEMENT