Question
In: Statistics and Probability
The average time it takes to complete a particular sociology test is 86.5 minutes. In a...
The
average time it takes to complete a particular sociology test is
86.5 minutes. In a recent study of 26 individuals that took it a
particular test the average amount of time to complete the
sociology test was 83.4 minutes. The sample standard deviation was
8.7 minutes. At the 0.10 level of significance can it be concluded
that the average amount of time it takes to complete the particular
sociology test is less than 86.5 minutes.
Solutions
orchestra answered 2 years agoRelated Solutions
The average time students need to finish a particular test is 72 minutes with a standard...
The average time students need to
finish a particular test is 72 minutes with a standard deviation of
12 minutes. (Assume that these times are normally distributed.)
What is the probability that a randomly selected student will
finish the exam in more than 75 minutes?
If the professor wants 95% of students to have sufficient time
to finish the test, how much time should she give them?
What is the probability that a group of 20 students will take
on...
Suppose the average time to complete a marathon is believed to be 264 minutes. If a...
Suppose the average time to complete a marathon is believed to
be 264 minutes. If a random sample of 67 marathon runners posted an
average time of 248 minutes, with a standard deviation of 46.6
minutes, is there evidence to support the claim that the average
time is lower than originally thought? Perform a hypothesis test
with significance level 0.01.
A. State the null hypothesis in symbols and in a complete
sentence.
B. State the alternative hypothesis in symbols and...
An automobile dealer conducted a test to determine if the time in minutes needed to complete...
An automobile dealer conducted a test to determine if the time
in minutes needed to complete a minor engine tune-up depends on
whether a computerized engine analyzer or an electronic analyzer is
used. Because tune-up time varies among compact, intermediate, and
full-sized cars, the three types of cars were used as blocks in the
experiment. The data obtained follow.
Analyzer
Computerized
Electronic
Car
Compact
50
41
Intermediate
55
44
Full-sized
63
47
Use α = 0.05 to test for any...
An automobile dealer conducted a test to determine if the time in minutes needed to complete...
An automobile dealer conducted a test to determine if the time
in minutes needed to complete a minor engine tune-up depends on
whether a computerized engine analyzer or an electronic analyzer is
used. Because tune-up time varies among compact, intermediate, and
full-sized cars, the three types of cars were used as blocks in the
experiment. The data obtained follow.
Analyzer
Computerized
Electronic
Car
Compact
49
41
Intermediate
56
45
Full-sized
63
46
Use α = 0.05 to test for any...
An automobile dealer conducted a test to determine if the time in minutes needed to complete...
An automobile dealer conducted a test to determine if the time
in minutes needed to complete a minor engine tune-up depends on
whether a computerized engine analyzer or an electronic analyzer is
used. Because tune-up time varies among compact, intermediate, and
full-sized cars, the three types of cars were used as blocks in the
experiment. The data obtained follow.
Analyzer
Computerized
Electronic
Car
Compact
52
43
Intermediate
55
43
Full-sized
61
46
Use α = 0.05 to test for any...
An automobile dealer conducted a test to determine if the time in minutes needed to complete...
An automobile dealer conducted a test to determine if the time
in minutes needed to complete a minor engine tune-up depends on
whether a computerized engine analyzer or an electronic analyzer is
used. Because tune-up time varies among compact, intermediate, and
full-sized cars, the three types of cars were used as blocks in the
experiment. The data obtained follow.
Analyzer
Computerized
Electronic
Car
Compact
50
42
Intermediate
57
45
Full-sized
61
45
Use α = 0.05 to test for any...
A car manufacturer has determined it takes an average time of 54 minutes to produce a...
A car manufacturer has
determined it takes an average time of 54 minutes to produce a car.
The population standard deviation is assumed to be 4 minutes. The
company pays a bonus to the workers for every car produced in 46
minutes or less. Assuming that the production time is normally
distributed, answer the following questions. Let X = production
time of a randomly selected car.
Round all
probabilities to four decimal places and times to two decimal
places.
a)...
A car manufacturer has determined it takes an average time of 54 minutes to produce a...
A car manufacturer has determined it takes an average time of 54
minutes to produce a car. The population standard deviation is
assumed to be 4 minutes. The company pays a bonus to the workers
for every car produced in 46 minutes or less. Assuming that the
production time is normally distributed, answer the following
questions. Let X = production time of a randomly selected car.
(Round all probabilities to four decimals and times to two
decimals)
a) What is...
9. You are interested in studying the average duration of time (in minutes) it takes Temple...
9. You are interested in studying the average duration of time
(in minutes) it takes Temple University students to drive to
campus. The conventional wisdom is that on average it takes
students 30 minutes to drive to campus. To examine this, you
randomly sample n=15 students and record this information. From the
sample, you compute a sample mean of 26 with a sample standard
deviation of 6. Conduct a two-tailed hypothesis test with 95%
confidence. Then, construct a 95% confidence...
If the average time to finish an IQ test is 85 minutes with standard deviation of...
If
the average time to finish an IQ test is 85 minutes with standard
deviation of 17 minutes and assuming the data are normally
distributed,
1. what percentage of test takers finish less than 117
minutes?
2. what percentage of test takers finishes between one hour to
hour and half?
3. find the time that separates the slowest 15% who finish the
test?
4. find the time that separates the fastest 5% who finish the
test?
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Suppose you are trying to determine the capacity (in gallons) of the gas tank needed on...
- List the arithmetic operators used in BASIC and state their priorities of execution in a statement....
- Describe the espoused values of a company you have worked for (or been exposed to -...
- Can you explain to me the differnces in how we paid for the health care (access...
- Discuss proactive and defensive marketing in context to the company position in the hypothetical market structure...
- Write a java code that could be used to show the simulation of a tornado. use...
- A Canadian company issues an 8-year term bond with face value of $1,000 and 6% coupon...
ADVERTISEMENT