12 Answered Questions for the topic Confidence Interval

Confidence Interval Statistics

05/17/21

If n=330 and p' (p-prime) = 0.05, construct a 95% confidence interval.
If n=330 and p' (p-prime) = 0.05, construct a 95% confidence interval.Give your answers to three decimals.?<p<?
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Confidence Interval Statistics Stats Sample

01/29/21

Can you interpret a confidence interval without knowing the population mean?
If we don't know the population mean, could we still make a precise interpretation of the confidence interval? For example, would we still be able to say that there is a 90% chance that the... more
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Confidence Interval Statistics Two Samples

08/08/20

Constructing a confidence interval btwn two groups
A survey is conducted of whether or not flu vaccinations should be mandatory. 141 out of 210 randomly polled civilians under the age of 30 were in agreement that flu vaccines should be mandatory.... more
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Confidence Interval Math Statistics Standard Deviation

06/12/20

Statistics with confidence intervals

A random sample of 80 college students was asked, “How many hours do you study each week?” After gathering the data, the sample has a mean of 14 hours and a standard deviation of 2.8 hours.... more
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Confidence Interval Statistics Stats T Distribution

04/24/20

The answer is 502.4 ml. How to get the answer?
A company making cans for lemonade wishes to print ‘Average content x ml’ on their cans, and to be 99% confident that the true mean volume is greater than x ml. The volume of lemonade in a can is... more
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Confidence Interval Statistics Statistics Question Stats

11/26/19

Statistics Confidence Interval
In a randomized comparative experiment on the effect of dietary calcium on blood pressure, researchers divided 48 healthy white males at random into two groups. One group received calcium; the... more
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Confidence Interval Statistics Statistics Question

11/24/19

Statistics Confidence Interval

Europeans have been more skeptical than Americans about the use of genetic engineering to improve foods. A sample survey gathered responses from random samples of 862 Americans and 12083 Europeans.... more
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Confidence Interval Math Statistics Randomsample

07/28/19

Statistics homework HELP
Sleeping outlier: A simple random sample of eight college freshmen were asked how many hours of sleep they typically got per night. The results... more
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Confidence Interval Statistics Probability

05/18/19

What is the 95 % conference interval for the average distance traveled to work by all employees?
A study of 13 employees found that the average distance they traveled to work was 14.3 miles. The standard deviation of the sample was 2 miles.
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Confidence Interval Statistics Mean

04/25/19

Confidence interval

study of the ages of motorcyclists killed in crashes involves the random selection of 139 drivers with a mean of 35.31 years. Assuming that σ=10.1 ​years, construct and interpret a 99​% ... more
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Confidence Interval Statistics

12/08/18

the average speed in mph of 20 randomly selected qualifiers for a race was 215.167 mph with a standard deviation of 3.12 mph. estimate the average qualifying speed with a 95% confidence interval.
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Confidence Interval Statistics Standard Deviation

12/08/18

A random sample of 36 drivers used on average 749 gallons of gasoline per year. If the standard deviation of the population is 332, find the 95% confidence interval of the mean for all drivers.
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