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One-sample t-test
Page 3
Questions (215)
The manager of a vacation resort has claimed that, on average, a guest spends at least $3000 at the resort during a one week
1 answer
asked by
Bev
460 views
Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more should be sent by 2-day mail
1 answer
asked by
Marilyn
704 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
Student
584 views
Listed below are the # of homeruns for the National League leader over the last 20 years. Assuming that # of homeruns is
1 answer
asked by
melanie
369 views
I need help with the following questions and appreciate any and all help given.
1. Faced with rising fax costs, a firm issued a
4 answers
asked by
la
636 views
An article claimed that the typical supermarket trip takes a mean of 22 minutes. suppose that in an effort to test this claim,
2 answers
asked by
tanya
947 views
the manufacturer of a certain brand of auto batteries claims the mean life of these batteries is 45 months. A consumer
4 answers
asked by
Anonymous
2,424 views
A biologist knows that the average length of a leaf of a certain full-grown plant is 4 inches. The standard deviation of the
4 answers
asked by
probability and statistic
2,222 views
A college professor believes that students take an average of 15 credit hours per semester. A random sample of 24 students in
4 answers
asked by
Dorothy
1,744 views
The average age for licensed drivers in a county is µ= 42.6, σ= 12 and the distribution is approximately normal. A county
3 answers
asked by
Mark
1,611 views
A sample of 64 observations is selected from a normal population. the sample mean is 215 and the standard deviation is 15.
3 answers
asked by
Shawn
1,640 views
The U.S. Department of Agriculture claims that the mean consumption of coffee by the person in the United States is 24.2 gallons
3 answers
asked by
Mike
1,579 views
The average annual salary of employees at Wintertime Sports was $28,750 last year. This year the company opened another store.
2 answers
asked by
Jasmine
1,488 views
A hypothesis test is to be performed. State the null and alternative hypotheses
At one school the average amount of time that
1 answer
asked anonymously
45 views
To test H0:µ =80 versus H1:µ < 80, a simple random sample of size n = 22 is obtained from the population that is known to be
4 answers
asked by
Liz
1,374 views
A coin mint has a specification that a particular coin has a mean weight of 2.5 g. A sample of 39 coins was collected. Those
2 answers
asked by
slomomo
1,278 views
A large university is interested in learning about the average time it takes students to drive to campus. The university sampled
2 answers
asked by
Noah
1,171 views
dole pineapple inc. is concerned that the 16 ounce cans are overfilled. assume the standard deviation is .03 onces. a random
2 answers
asked by
dimitra
1,132 views
An auto maker estimates that the mean gas mileage of its sport utility vehicle is 20 miles per gallon. A random sample of 8 such
4 answers
asked by
George
1,108 views
A score of 243 is a "basic" reading level.
Scores for a random sample of 3000 students had a xbar = 250 with a standard error 1.0
2 answers
asked by
please help
1,066 views
It is claimed that an automobile is driven on the average more than 20,000 kilometers per year. Random sample of 10 automobile
1 answer
asked by
Ali
1,068 views
"Working Mom’s Journal" reported that the mean time a mother, with her small children, spends in at the convenience store is
2 answers
asked by
Nadine
1,045 views
Recall that very satisfied customers give the XYZ- Box video game system a rating that is at least 42. Suppose that the
1 answer
asked by
AC
1,004 views
The average age of evening students at a local college has been 21.
A sample of 19 students was selected in order to determine
2 answers
asked by
carrie
1,051 views
Prep Courses? Scores for men (nationwide) on the verbal portion of the SAT test are normally distributed with a mean of 509 and
2 answers
asked by
STatistic
1,023 views
A recent article in a computer magazine suggested that the mean time to fully learn a new software program is 40 hours. A sample
2 answers
asked by
Janice
1,001 views
2. The director of admissions at a large university advises students that the cost of textbooks will average more than $300 for
4 answers
asked by
Elizabeth
1,007 views
A medical board claim that the mean number of hours worked per week by surgical faculty who teach at an academic institution is
3 answers
asked by
Jessie
971 views
A countrywide estate agency specializes in selling commercial ventures. Their records show that the mean selling time is less
4 answers
asked by
general
939 views
Use the data given to test the following hupotheses. Assume the data are normally distributed in the population.
Ho: M=7.48
3 answers
asked by
daniel
920 views
okay heres the question and the answer I have, but Im not sure its right because the values seem way too high to interpet what
2 answers
asked by
Stumped again
917 views
mortgage broker is offering home mortgages at a rate of 9.5%, but the broker is fearful that this value
is higher than many
2 answers
asked by
Rald
923 views
Steven collected data from 20 college students on their emotional responses to classical music. Students listened to two
1 answer
asked by
Jameson
903 views
Maureen is a cocktail hostess in a very exclusive private club. The IRS is auditing her tax return. Maureen claims that her
2 answers
asked by
Kay
875 views
the average length of time for students to register for fall classes at a certain college has been 50 minutes. a new
2 answers
asked by
Anonymous
869 views
. [16 points] A coach uses a nw technique to train gymnasts. 7 gymnasts were randomly selected and their competition scores were
3 answers
asked by
Elyse
863 views
Suppose you want to test the claim that mu is not equal to 3.5. Given a sample size of n = 31 and a level of significance of
2 answers
asked by
Brittany
849 views
Scores on an IQ test are normally distributed. A sample of 15 IQ scores had standard deviation s=10. The developer of the test
1 answer
asked by
steph
817 views
Someone please help me, I do not understand how to solve this problem:
Let x be a random variable representing dividend yield of
1 answer
asked by
Riana
810 views
The world’s smallest mammal is the bumblebee bat. Such bats are roughly
the same size of a large bumblebee. Listed below are
2 answers
asked by
Jonie
780 views
1-Suppose that the fuel comsumption of cars for the same model is normally distributed. A random sample
of ten new cars of the
1 answer
asked by
Judy and group
748 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
Eric
776 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
Sabrina
717 views
Long term experience showed that after a type of eye surgery, recovery time has a mean of u = 5.3 days in a hospital. A random
1 answer
asked by
Jasmine
742 views
According to CTIA-The Wireless Association, the mean monthly cell phone bill in 2004 was $50.64. A market
researcher believes
1 answer
asked by
Kris
747 views
Given a sample size of 38, with sample mean 660.3 and sample standard deviation 95.9 we are to perform the following hypothesis
3 answers
asked by
Scott
756 views
It is known from the records of the City Schools that the standard deviation
of Algebra scores is 6.0. A sample of 200 students
2 answers
asked by
pokwang
745 views
Use a table of t-values to estimate the P-value for the specified one-mean t-test. Left-tailed test, n=12, t= -3.412. a=p<0.005.
1 answer
asked by
Kris
724 views
Find the test statistic, P-value, and critical value. Round to 3 decimal places.
Claim: The mean IQ score of statistics
2 answers
asked by
larae
711 views
In the population, the average IQ is μ = 100 with a standard deviation of σ = 15. A team of scientists wants to test a new
2 answers
asked by
sam
715 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