a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ✓? Р P H₁: Select an answer ✓ Select an answer ✓ c. The test statistic ? ✓ = (please show your answer to 3 decimal places.)
a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ✓? Р P H₁: Select an answer ✓ Select an answer ✓ c. The test statistic ? ✓ = (please show your answer to 3 decimal places.)
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
Transcribed Image Text:Question 7
▼ < >
The average number of accidents at controlled intersections per year is 4.9. Is this average a different
number for intersections with cameras installed? The 67 randomly observed intersections with cameras
installed had an average of 5 accidents per year and the standard deviation was 1.01. What can be
concluded at the a = 0.05 level of significance?
a. For this study, we should use Select an answer
b. The null and alternative hypotheses would be:
Ho: ✓? Select an answer ✓
Р
H
H₁:
Select an answer ✓
c. The test statistic ? ✓ =
d. The p-value =
e. The p-value is ? a
f. Based on this, we should
g. Thus, the final conclusion is that ...
(please show your answer to 3 decimal places.)
(Please show your answer to 4 decimal places.)
Select an answer the null hypothesis.
O The data suggest that the population mean is not significantly different from 4.9 at a = 0.05,
so there is statistically insignificant evidence to conclude that the population mean number of
accidents per year at intersections with cameras installed is different from 4.9 accidents.
O The data suggest that the sample mean is not significantly different from 4.9 at a = 0.05, so
there is statistically insignificant evidence to conclude that the sample mean number of
accidents per year at intersections with cameras installed is different from 5 accidents.
O The data suggest that the populaton mean is significantly different from 4.9 at a = 0.05, so
there is statistically significant evidence to conclude that the population mean number of
accidents per year at intersections with cameras installed is different from 4.9 accidents.
Transcribed Image Text:Question 7
<
The average number of accidents at controlled intersections per year is 4.9. Is this average a different
number for intersections with cameras installed? The 67 randomly observed intersections with cameras
installed had an average of 5 accidents per year and the standard deviation was 1.01. What can be
concluded at the a = 0.05 level of significance?
a. For this study, we should us
b. The null and alternative hyp
Ho: ? Select an answer
H₁: ? Select an answer ✓
Select an answer
z-test for a population proportion
t-test for a population mean
c. The test statistic ? =
d. The p-value =
e. The p-value is ? a
f. Based on this, we should Select an answer
g. Thus, the final conclusion is that ...
(please show your answer to 3 decimal places.)
(Please show your answer to 4 decimal places.)
the null hypothesis.
O The data suggest that the population mean is not significantly different from 4.9 at a = 0.05,
so there is statistically insignificant evidence to conclude that the population mean number of
accidents per year at intersections with cameras installed is different from 4.9 accidents.
O The data suggest that the sample mean is not significantly different from 4.9 at a = 0.05, so
there is statistically insignificant evidence to conclude that the sample mean number of
accidents per year at intersections with cameras installed is different from 5 accidents.
O The data suggest that the populaton mean is significantly different from 4.9 at a = 0.05, so
there is statistically significant evidence to conclude that the population mean number of
accidents per year at intersections with cameras installed is different from 4.9 accidents.
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