Question
In: Statistics and Probability
Listed below are speeds (mi/h) measured from traffic on a busy highway. This simple random sample...
Listed below are speeds (mi/h) measured from traffic on a busy highway. This simple random sample was obtained at 3:30 P.M. on a weekday. Use the sample data to construct a 90% confidence interval estimate of the population standard deviation. 61 63 63 57 63 52 60 59 60 70 62 68 The confidence interval estimate is ------mi/h < σ <------ mi/h. (Round to one decimal place as needed.) Does the confidence interval describe the standard deviation for all times during the week? Choose the correct answer below. A. No. The confidence interval is an estimate of the standard deviation of the population of speeds at 3:30 on a weekday, not other times. B. Yes. The confidence interval describes the standard deviation for all times during the week.
Solutions
orchestra answered 1 year agoRelated Solutions
Listed below are speeds (mi/h) measured from traffic on a busy highway. This simple random sample...
Listed below are speeds (mi/h) measured from traffic on a busy
highway. This simple random sample was obtained at 3:30 P.M. on a
weekday. Use the sample data to construct a 980% confidence
interval estimate of the population standard deviation
65
63
63
57
63
55
61
60
61
70
62
66
The confidence interval estimate is ??? mi/h < σ < ???
mi/h.
Listed below are speeds (mi/h) measured from traffic on a busy highway. This simple random sample...
Listed below are speeds (mi/h) measured from traffic on a busy
highway. This simple random sample was obtained at 3:30 P.M. on a
weekday. Use the sample data to construct
a 98% confidence interval estimate of the population standard
deviation.
62
60
60
56
60
53
59
58
59
68
58
67
Listed below are speeds (mi/h) measured from traffic on a busy highway. This simple random sample...
Listed below are speeds (mi/h) measured from traffic on a busy
highway. This simple random sample was obtained at 3:30 P.M. on a
weekday. Use the sample data to construct a
99% confidence interval estimate of the population standard
deviation. USE CHI -SQAURE CRITICAL VALUES
62
63
63
55
63
53
59
58
59
69
58
67
The confidence interval estimate is _____ mi/h
<σ< ________ mi/h. (Round to one decimal
place as needed.)
Does the confidence interval describe the...
Listed below are speeds (mi/h) measured from traffic on a busy highway. This simple random sample...
Listed below are speeds (mi/h) measured from traffic on a busy
highway. This simple random sample was obtained at 3:30 P.M. on a
weekday. Use the sample data to construct a 90% confidence
interval estimate of the population standard deviation. 62 60 60 56
60 53 59 58 59 70 61 66 LOADING... Click the icon to view the table
of Chi-Square critical values. The confidence interval estimate is
nothing mi/h less thansigmaless than nothing mi/h. (Round to one
decimal...
sted below are speeds (mi/h) measured from traffic on a busy highway. This simple random sample...
sted below are speeds (mi/h) measured from traffic on a busy
highway. This simple random sample was obtained at 3:30 P.M. on a
weekday. Use the sample data to construct
aa
98%
confidence interval estimate of the population standard
deviation.
6161
6464
6464
5757
6464
5454
6060
5959
6060
7070
6262
6868
Question
The confidence interval estimate is
mi/h ___<σ< ___mi/h.
(Round to one decimal place as needed.)
Does the confidence interval describe the standard deviation for
all times during...
#14 . Listed below are speeds (mi/h) measured from southbound traffic on I-280 near Cupertino, CA....
#14 . Listed below are speeds (mi/h) measured from southbound
traffic on I-280 near Cupertino, CA. This simple random sample was
obtained at 3:30 p.m. on a weekday. Use a 0.05 significance level
to test the claim of the highway engineer that the standard
deviation of speeds is equal to 5.0 mi/h. (With a 95% confidence)
62 61 61 57 61 54 59 58 59 69 60 67
A) Construct a confidence interval using the confidence level
provided.
B) Test...
Listed below are the speed ((mi/h) measured from the Southbound traffic on I-280. The speed limit...
Listed below are the speed ((mi/h) measured from the Southbound
traffic on I-280. The speed limit is 65 mph.
62, 61, 61, 57, 61, 54, 59, 58, 59, 69, 60, and 67
1.Construct a 95% confidence interval.
2.What will happen to the width of the confidence interval if
the confidence level is increased to 99%? Explain
3. What will happen to the accuracy of the estimate if the
sample size is increase
Listed below are the speed ((mi/h) measured from the Southbound traffic on I-280. The speed limit...
Listed below are the speed ((mi/h) measured from the
Southbound traffic on I-280. The
speed limit is 65 mph.
62, 61, 61, 57, 61, 54, 59, 58, 59, 69, 60, 67, 70, 72, and
75
1. Construct a 99% confidence interval.
2. What will happen to the width of the confidence interval if
the confidence level is
increased to 99%? Explain
3.) What will happen
to the accuracy of the estimate if the sample size is
increased.
California Speeding: Listed below are the recorded speeds (in mi/hr) of randomly selected cars traveling on...
California Speeding: Listed below are the recorded speeds (in
mi/hr) of randomly selected cars traveling on a section of Highway
405 in Los Angeles. That part of the highway has a posted speed
limit of 65 mi/hr. Assume the standard deviation of speeds is 5.7
mi/hr. Use a 1% significance level to test the claim that sample is
from a population with a mean weight that is greater than 65 mi/hr.
68 68 72 73 65 74 73 72 68...
Listed below are the durations (in hours) of a simple random sample of all flights of...
Listed below are the durations (in hours) of a simple random
sample of all flights of a space shuttle program. Find the range,
variance, and standard deviation for the sample data. Is the lowest
duration time unusual? Why or why not?
76
90
234
195
165
265
197
372
252
237
384
340
225
245
0
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