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Confidence Interval
Page 3
Questions (364)
FORMAT INSTRUCTIONS
Each question requires the use of MINITAB to solve. Please submit your work as a WORD or similar document.
1 answer
asked by
Amer
482 views
There are 300 students enrolled in Business Statistic. Historically, exam scores are normally distributed with a standard
2 answers
asked by
Leo Elvis
516 views
In a sample of seven cars, each car was tested for nitrogen-oxide emissions (in grams per mile) and the following results were
3 answers
asked by
slomomo
1,546 views
7. Give and interpret the 95% confidence interval for the hours of sleep a student gets.
2 answers
asked by
Anonymous
550 views
A nutritionist wants to determine how much time nationally people spend eating and drinking. Suppose for a random sample of 1065
3 answers
asked by
LADO
2,520 views
An agricultural researcher is interested in estimating the mean length of the growing season in a region. Treating the last 10
3 answers
asked by
STATS 2
1,849 views
Thank you in advance for anyone able to help me with this...
In a sample of 67 randomly selected students, 27 favored the amount
1 answer
asked by
linda
385 views
I would really appreciate help with this.
In a survey of 1000 large corporations, 252 said that, given a choice between a job
1 answer
asked by
Mandy
709 views
A random sample of 16 mid-sized cars tested for fuel consumption gave a mean of 26.4 kilometers per litre with a standard
3 answers
asked by
John
641 views
1. A confidence interval can be calculated to estimate the population mean when the population is normally distributed or the
2 answers
asked by
morgana
641 views
A teacher wants to compare the mean geology scores of two different classes. She is testing the null hypothesis that there is no
2 answers
asked by
Gabby
965 views
Thirty randomly selected students took the calculus final. If the sample mean was 89 and the standard deviation was 6.2,
2 answers
asked by
Anonymous
1,020 views
It's a total of 55 students majoring in History. What is the proportion of MBA students majoring in history. Compute to 95%
1 answer
asked by
Jessica
444 views
A survey of households in a small town showed that in 500 of 1,200 sampled households, at least one member attended a town
4 answers
asked by
anu
4,062 views
Annual starting salaries for college graduates with degrees in business administration are generally expected to be between
1 answer
asked by
Vanessa
668 views
The Wall Street Journal reported that automobile crashes cost the United States $162 billion annually (The Wall Street Journal,
3 answers
asked by
Vanessa
2,666 views
Find the 95 percent range for the sample mean, assuming that each sample is from a normal
population. a. ì = 200, ó = 12, n =
1 answer
asked by
Kevin
371 views
Allen's hummingbird (Selasphorus sasin) has been studied by zoologist Bill Alther.† Suppose a small group of 17 Allen's
3 answers
asked by
Alexus
1,535 views
A student union wants to obtain a 90% confidence interval for the proportion of “full time” students who hold a part-time
1 answer
asked by
Steven
405 views
2. A researcher has developed a new questionnaire for measuring dominance and would like to estimate the population parameters
1 answer
asked by
shanice
402 views
In a random sample of 200 registered voters, 120 indicated they are Democrats. Develop a 95% confidence interval for the
2 answers
asked by
Nicole Jones
972 views
Sorry for all the questions, I really need help and an explanation so I can fully understand. I really appreciate everything.
2 answers
asked by
penelope
531 views
Consider the following. (Give your answers correct to two decimal places.)
(a) Determine the value of the confidence coefficient
1 answer
asked by
Sue 8
331 views
A poll conducted in 1972 asked 1003 people, " During the past year, about how many books did you read either all or part of the
4 answers
asked by
Megan
779 views
A poll was conducted that asked 1015 people how many books they had read in the past year. Results indicated that x-bar= 12.3
4 answers
asked by
Megan
1,890 views
A school psychologist reports that the mean number of hours the students at this school sleep each night is 8 hours. The
2 answers
asked by
Anonymous
704 views
construct a 90 confidence interval for the population mean ÃŽ¼. assume the population has a normal distribution. A sample if
1 answer
asked by
Anonymous
451 views
5) In a 95% Confidence Interval, the true mean has what chance of falling between the Lower Limit and Upper Limits of the
1 answer
asked by
Linda
634 views
One hundred subjects in a psychological study had a mean of 35 on a test instrument designed to measure anger. The study the
4 answers
asked by
chris
677 views
In a transportation study of 20 large cities, it was found that the mean of the number of cars per person was 0.504. (Some of
1 answer
asked by
chris
418 views
Find the 98% confidence interval for estimating ìd based on these paired data and assuming normality. (Give your answers
2 answers
asked by
Kim
566 views
The standard deviations s for the annual medical costs 30 heart disease patients was found to equal $1005. Find a 95 %
5 answers
asked by
chris
586 views
The population standard deviation of people who shop online is 3.1. If you want to be 75% confident that the sample mean is
1 answer
asked by
Alley
693 views
In a sample of 200 people, 154 said they watched educational television. Find the 90% confidence interval of the true proportion
2 answers
asked by
TessaFaithMarie
1,030 views
A beverage comopany uses a machine to automatically fill 1-liter bottles. Assume that the population of volumes is normally
3 answers
asked by
Erica
528 views
What critical t value would be needed to construct a 90% confidence interval on a sample of size 22?
1.717 1.323 2.080 1.321
3 answers
asked by
etwetw
838 views
in a random sample of 400 voter, 120 plan to vote for candidate A. determine a 95% confidence interval
2 answers
asked by
John
497 views
n a study using 15 respondents and in which the population variance is unknown, what distribution should be used to calculate
1 answer
asked by
Anonymous
444 views
you sample 100 women and the average mean is 16, Calculate 95% Confidence interval for the sample. Do you have evidence the true
3 answers
asked by
najuma
341 views
In a study of children with a particular disorder, parents were asked to rate their child on a variety of items related to how
3 answers
asked by
James
1,615 views
You want to rent an unfurnished one-bedroom apartment in Boston next year. The mean monthly rent for a random sample of 14
2 answers
asked by
James
749 views
If 200 of the adults surveyed were in the age category of 24 and under and they provided a standard deviation of $14.50,
2 answers
asked by
victoria
499 views
Given a level of confidence of 95% and a population standard deviation of 13, answer the following:
(A) What other information is
1 answer
asked by
Victoria
305 views
The major would like to estimate the mean number of automobile crashes per day at the intersection of 2 highways. A random
1 answer
asked by
Kim
402 views
suppose we wish to construct a confidence interval for a population proportion p. if we sample without replacement from a
2 answers
asked by
carl
596 views
The 95% confidence interval for a quality control specimen is 9.2-10.2 mg/dl.
My question is, how do I figure out the coefficient
1 answer
asked by
Jason
301 views
A random sample of 30 plants has a sample standard deviation of 3.4 days for maturity. A 95% confidence interval for the
1 answer
asked by
Apryl
445 views
student conduct a study and reported that 95% confidence intervak for themean ranged from 46-54. He was surethat the mean of the
1 answer
asked by
noela
477 views
an average length of 2 inches and a standard deviation of .005 inches. What is the 95% confidence interval for the length of
1 answer
asked by
mark
327 views
Historically, the proportion of adults over the age of 24 who smoke has been estimated to be .30. You want to take a sample to
1 answer
asked by
Tammy
461 views
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