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One-sample t-test
Page 4
Questions (215)
3. A researcher is interested in whether listening to music helps or hinders test-performance. To control for differences in
2 answers
asked by
Carl
717 views
A manager states that in his factory, the mean number of days per year missed by his employees is less than the national mean of
2 answers
asked by
Joey
676 views
A production process is considered to be out of control if the produced parts have lengths with a standard deviation greater
1 answer
asked by
Mallory
648 views
Q. The MBA department is concerned that dual degree students may be receiving lower grades than the regular MBA students. Two
1 answer
asked by
jeen
631 views
The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures students' study habits and attitudes
1 answer
asked by
Yesenia
639 views
I'm taking stats online which is making it even more difficult for me and I have nowhere to begin when answering this question.
1
2 answers
asked by
Michelle
608 views
To test H0: = 80 versus H1: < 80. a simple random sample of size n = 22 is obtained from a population that is known to
2 answers
asked by
Ted
632 views
A student claims the average amount of time spent studying for an exam is less than or equal to 120 minutes. A random sample of
2 answers
asked by
Matt
616 views
A hospital claims that the mean waiting time at its emergency room is 25 minutes. A random sample of 16 patients produced a mean
2 answers
asked by
Steven
623 views
An article (N. Hellmich. "'Supermarket Guru' Has a Simple Mantra,” USA Today, June 19, 2002, p. 70) claimed that the typical
2 answers
asked by
Statistics baby
611 views
A manufacturer of toasters claims that the toasters have a mean life of 9 years and a standard deviation of 2.1 years. A random
1 answer
asked anonymously
45 views
A new drug has been developed for a group of people and the researchers are worried that it might have an effect on pulse rate.
1 answer
asked anonymously
46 views
A manufacturer of toasters claims that the toasters have a mean life of 9 years and a standard deviation of 2.1 years. A random
1 answer
asked anonymously
47 views
Suppose you have information that the average stress score of students in online universities is 13.15.
Using Minitab, compute a
2 answers
asked by
edna
610 views
A newspaper article stated that college students at a local university spent an average of $95 on beer a year. A student
4 answers
asked by
vera
598 views
Kindergarten children have heights that are approximately distributed normal. A random sample of size 20 is taken and the mean x
2 answers
asked by
T
587 views
Many grocery stores have installed self checkout systems. Below is the number of customers using the service for a sample of 15
2 answers
asked by
Johnny
611 views
The Phillies were accused of cheating their beer customers by not putting enough beer in their 12 oz
cups. When 15 cups were
2 answers
asked by
gianna
566 views
A random sample of size 20 from a normal population will sample mean 42 and sample standard deviation of 6 . To test the
2 answers
asked by
masood
620 views
Complete the hypothesis test: null hypothesis = 52, alternative hypothesis =<52, a=0.01 usin data set
2 answers
asked by
Shelly
580 views
Exercise 1: A random sample of 400 houscholds was drawn fromn a town and a survey generated
data on weekly earning. The mean in
1 answer
asked by
Abrish
37 views
Below are six data sets with 6 randomly selected scores in each data set. Your task is to determine if the scores were drawn
2 answers
asked by
Anonymous
543 views
A telephone company's records indicate that private customers pay on average $17.10 per month for long-distance telephone calls.
2 answers
asked by
Stanley
543 views
A medical researcher believes that the standard deviation of the temperatures of newborn infants is greater than 0.6 degrees. A
2 answers
asked by
Ina
542 views
An auditor reviewed 25 oral surgery insurance claims from a particular surgical office, determining that the mean out-of-pocker
4 answers
asked by
la
529 views
Steven collected data from 20 college students on their emotional responses to classical music. Students listened to two
2 answers
asked by
lewis
567 views
The manager at the YMCA believes members are staying longer at the Y due to what they feel was a very successful marketing plan.
2 answers
asked by
Henry
539 views
A manufacturer of sports equipment claims that the new fishing line has a mean breaking strength of at least 8 kilograms. Test
2 answers
asked by
Kori
547 views
An engineering company believes it has developed a faster way to complete the assembly of an industrial machine. The present
2 answers
asked by
amy
556 views
A random sample of 150 pumpkins is obtained and the mean circumference is found to be
45 cm. Assuming that the population
2 answers
asked by
Robin
525 views
The mean of a population of raw scores is 33 1_X 5 122 . Use the criterion of .05 and the upper tail of the sampling
2 answers
asked by
Anonymous
525 views
For normal population mean 60, standard deviation 15, after treatment is given to the member of sample , the sample mean is 65,
2 answers
asked by
Anonymous
514 views
Your muffler factory claims to manufacture mufflers with a lifespan of more than 10000 miles of usage. A consumer group tests
2 answers
asked by
lulu
499 views
Suppose the mean income of 35-year-olds in the US is $25,000. A random sample of 150 35-year-olds in California results in a
3 answers
asked by
jason
521 views
41. The weight of adults in a certain city has a mean of 130 lbs, with standard deviation of 41
1bs. A sample of 25 adults living
1 answer
asked by
Abrish
41 views
A battery manufacturer is positive that its AA batteries last for 1,000 hours. However, you’re working for Consumer Reports
1 answer
asked by
Mike
514 views
A telephone company's records indicate that private customers pay on average $17.10 per month for long-distance telephone calls.
2 answers
asked by
Anonymous
504 views
Perform hypothesis testing on one variable’s data. (Choose either the intrinsic or extrinsic column.) Perform a t-test by
2 answers
asked by
Sopheia
513 views
Suppose you have information that the
average stress score of students in online activities is 13.15. Using Minitab, compute a
1 answer
asked by
joy
499 views
A rental agency claims that the average rent that small business establishments pay in Suva city is $800. A sample of 10
2 answers
asked by
Anny
477 views
Steven collected data from 20 college students on their emotional responses to classical music. Students listened to two
2 answers
asked by
carrie
488 views
A group of 10 students have average of GPA of 2.8 with SD of 0.3. Does this group present enough evidence to indicate that the
3 answers
asked by
Walkira
466 views
A large television repair service claims that its average repair charge is $124. Suspecting that the average charge is higher, a
2 answers
asked by
lola
486 views
Employees in a large computer firm claim that the mean salary of the firm’s programmers is less than that of its competitors.
2 answers
asked by
Kelly
480 views
Measurements on the percentage of enrichment of 12 fuel rods used in a nuclear reactor were reported as follows;
3.11 2.88 3.08
1 answer
asked by
Josh
472 views
A countrywide estate agency specializes in selling commercial ventures. Their records show that the mean selling time is less
1 answer
asked by
Frans
462 views
Suppose the mean income of 35-year-olds in the U.S. is $25,000. A random sample of 150 35-year-olds in California results in a
1 answer
asked by
Erinn
459 views
A manufacturer claims that the mean lifetime of its lithium batteries is 1400 hours. A homeowner thinks it may be different from
1 answer
asked by
Nishat
451 views
A random sample of 49 credit ratings is obtained, and it is found that they have a (sample) mean of 679.3 and a sample standard
1 answer
asked by
Parker
462 views
The mean sleep time of babies is 14hrs,a sample of 64 babies showed a mean of 13hrs 30min with a standard deviation of 3hrs at
4 answers
asked by
Patrick
455 views
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Parent Categories (8)
Comparing means
Hypothesis Test
Hypothesis Testing
Significance Testing
Statistical Hypothesis Testing
Statistics and Data Analysis
Student's t-test
Testing of Means