Compute the sample mean and sample deviation
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
Related questions
Topic Video
Question
Part C. Compute the sample mean and sample deviation.
![Joan's Nursery specializes in custom-designed landscaping for residential areas. The estimated labor cost associated with a particular
landscaping proposal is based on the number of plantings of trees, shrubs, and so on to be used for the project. For cost estimating
purposes, managers use two hours of labor time for the planting of a medium-sized tree. Actual times from a sample of 10 plantings
during the past month follow (times in hours).
1.4
1.5
1.3
2.2
2.1
2.2
2.7
2.6
2.3
3.2
With a 0.05 level of significance, test to see whether the mean tree-planting time differs from two hours.
a. State the null and alternative hypotheses.
Ho :
Select your answer - ♥
d: ®H
b. Compute the sample mean.
Select your answer - ▼
a
(to 2 decimals)
C. Compute the sample standard deviation.
(to 4 decimals)
d. Find the test statistic and p-value. (Use Table 2 in Appendix B.)
(to 3 decimals)
p-value
Select your answer -
e. What is your conclusion?
We
- Select your answer
- v reject the null hypothesis. There
Select your answer-
v enough evidence to prove that the mean tree-
planting time differs from 2 hours.
2]
2)
t,](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd3458b95-5123-4489-b2c3-cf4b0d696559%2Fd2e1859b-667b-443d-8c5a-37dff631af60%2F18g9d1g_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Joan's Nursery specializes in custom-designed landscaping for residential areas. The estimated labor cost associated with a particular
landscaping proposal is based on the number of plantings of trees, shrubs, and so on to be used for the project. For cost estimating
purposes, managers use two hours of labor time for the planting of a medium-sized tree. Actual times from a sample of 10 plantings
during the past month follow (times in hours).
1.4
1.5
1.3
2.2
2.1
2.2
2.7
2.6
2.3
3.2
With a 0.05 level of significance, test to see whether the mean tree-planting time differs from two hours.
a. State the null and alternative hypotheses.
Ho :
Select your answer - ♥
d: ®H
b. Compute the sample mean.
Select your answer - ▼
a
(to 2 decimals)
C. Compute the sample standard deviation.
(to 4 decimals)
d. Find the test statistic and p-value. (Use Table 2 in Appendix B.)
(to 3 decimals)
p-value
Select your answer -
e. What is your conclusion?
We
- Select your answer
- v reject the null hypothesis. There
Select your answer-
v enough evidence to prove that the mean tree-
planting time differs from 2 hours.
2]
2)
t,
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps with 6 images
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.Recommended textbooks for you
Glencoe Algebra 1, Student Edition, 9780079039897…
Algebra
ISBN:
9780079039897
Author:
Carter
Publisher:
McGraw Hill
Glencoe Algebra 1, Student Edition, 9780079039897…
Algebra
ISBN:
9780079039897
Author:
Carter
Publisher:
McGraw Hill