Strength of concrete: The compressive strength, in kilopascals, was measured for concrete blocks from five different batches of concrete, both three and six days after pouring. The data are as follows. Can you conclude that the mean strength after three days is greater than the mean strength after six days? Let μ₁ represent the mean strength after three days and μμ₁-₂. Use the a= 0.05 level and the critical value method with the table. Block 1 2 3 4 5 1384 1341 1386 1382 1349 After 3 days After 6 days 1344 1343 1307 1325 1301 Send data to Excel Part 1 of 5 (a) State the null and alternate hypotheses. Hồi Ha=0| H₁: Pa> This hypothesis test is a right-tailed test. Part: 1 / 5 Part 2 of 5 Find the critical value. Round the answer to three decimal places. If there is more than one critical value, separate them with commas. The critical value(s): X
Strength of concrete: The compressive strength, in kilopascals, was measured for concrete blocks from five different batches of concrete, both three and six days after pouring. The data are as follows. Can you conclude that the mean strength after three days is greater than the mean strength after six days? Let μ₁ represent the mean strength after three days and μμ₁-₂. Use the a= 0.05 level and the critical value method with the table. Block 1 2 3 4 5 1384 1341 1386 1382 1349 After 3 days After 6 days 1344 1343 1307 1325 1301 Send data to Excel Part 1 of 5 (a) State the null and alternate hypotheses. Hồi Ha=0| H₁: Pa> This hypothesis test is a right-tailed test. Part: 1 / 5 Part 2 of 5 Find the critical value. Round the answer to three decimal places. If there is more than one critical value, separate them with commas. The critical value(s): X
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.1: Measures Of Center
Problem 9PPS
Related questions
Question
![Strength of concrete: The compressive strength, in kilopascals, was measured for concrete blocks from five different batches of concrete, both three and six
days after pouring. The data are as follows. Can you conclude that the mean strength after three days is greater than the mean strength after six days? Let μ₁
represent the mean strength after three days and μμ₁ −μ₂. Use the a= 0.05 level and the critical value method with the table.
Block
1
2
3
4
5
After 3 days
1386
1382 1349
1384 1341
After 6 days 1344 1343 1307 1325
1301
Send data to Excel
Part 1 of 5
(a) State the null and alternate hypotheses.
Ho|ua = 0
H₁ H₂ > 0
This hypothesis test is a right-tailed ▼test.
Part: 1 / 5
Part 2 of 5
Find the critical value. Round the answer to three decimal places. If there is more than one critical value, separate them with commas.
The critical value(s):
0.0....
X](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7d29445b-e049-4728-8964-cf5ca6a5cb83%2Feca537c9-313d-42e5-b6c9-5c3b993c243e%2F7jrdvkq_processed.png&w=3840&q=75)
Transcribed Image Text:Strength of concrete: The compressive strength, in kilopascals, was measured for concrete blocks from five different batches of concrete, both three and six
days after pouring. The data are as follows. Can you conclude that the mean strength after three days is greater than the mean strength after six days? Let μ₁
represent the mean strength after three days and μμ₁ −μ₂. Use the a= 0.05 level and the critical value method with the table.
Block
1
2
3
4
5
After 3 days
1386
1382 1349
1384 1341
After 6 days 1344 1343 1307 1325
1301
Send data to Excel
Part 1 of 5
(a) State the null and alternate hypotheses.
Ho|ua = 0
H₁ H₂ > 0
This hypothesis test is a right-tailed ▼test.
Part: 1 / 5
Part 2 of 5
Find the critical value. Round the answer to three decimal places. If there is more than one critical value, separate them with commas.
The critical value(s):
0.0....
X
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![Strength of concrete: The compressive strength, in kilopascals, was measured for concrete blocks from five different batches of concrete, both three and six
days after pouring. The data are as follows. Can you conclude that the mean strength after three days is greater than the mean strength after six days? Let μ₁
represent the mean strength after three days and μμ₁ −μ₂. Use the a= 0.05 level and the critical value method with the table.
Block
1
2
3
4
5
After 3 days
1341 1386
1382
1349
1384
1344 1343 1307
After 6 days
1325 1301
Send data to Excel
Part 1 of 5
(a) State the null and alternate hypotheses.
Ho: Ha = 0
H₁: Pa
This hypothesis test is a right-tailed
test.
Part 2 of 5
Find the critical value. Round the answer to three decimal places. If there is more than one critical value, separate them with commas.
The critical value(s): 2.132
Part: 2 / 5
Part 3 of 5
(b) Compute the test statistic. Round the answer to at least three decimal places.
t=
X](https://content.bartleby.com/qna-images/question/7d29445b-e049-4728-8964-cf5ca6a5cb83/69dd478b-7423-4d62-b0be-dc60930b7078/s0s37v_thumbnail.png)
Transcribed Image Text:Strength of concrete: The compressive strength, in kilopascals, was measured for concrete blocks from five different batches of concrete, both three and six
days after pouring. The data are as follows. Can you conclude that the mean strength after three days is greater than the mean strength after six days? Let μ₁
represent the mean strength after three days and μμ₁ −μ₂. Use the a= 0.05 level and the critical value method with the table.
Block
1
2
3
4
5
After 3 days
1341 1386
1382
1349
1384
1344 1343 1307
After 6 days
1325 1301
Send data to Excel
Part 1 of 5
(a) State the null and alternate hypotheses.
Ho: Ha = 0
H₁: Pa
This hypothesis test is a right-tailed
test.
Part 2 of 5
Find the critical value. Round the answer to three decimal places. If there is more than one critical value, separate them with commas.
The critical value(s): 2.132
Part: 2 / 5
Part 3 of 5
(b) Compute the test statistic. Round the answer to at least three decimal places.
t=
X
Solution
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