Calculus and Above

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I need to find the sample mean, sample standard deviation,
I need to find the sample mean, sample standard deviation, and construct a 90% confidence interval for the population mean … read more
Sandhya_sharma
Sandhya_sharma
Master's Degree
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I have 3 multiple choice statistics questions but the
I have 3 multiple choice statistics questions but the professor wants us to show our work for each? See below for the questions 1 - Which of the following statements is true regarding a 95% confidence… read more
Sandhya_sharma
Sandhya_sharma
Master's Degree
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Pilots who cannot maintain regular sleep hours due to their
Pilots who cannot maintain regular sleep hours due to their work schedule often suffer from insomnia. A recent study on sleeping patterns of pilots focused on quantifying deviations from regular sleep… read more
Sandhya_sharma
Sandhya_sharma
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I'm going to try to figure out how to snip it... The
I'm going to try to figure out how to snip it... The standard deviation of the daily demand for a product is an important factor for inventory control for the product. Suppose that a pharmacy wants to… read more
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In a random sample of 21 people the mean commute time to
In a random sample of 21 people the mean commute time to work was 30.5 minutes and the standard deviation was 7.1 minutes. Assume the population is normally distributed and use a t-distributed to cons… read more
GLENN GILONGOS
GLENN GILONGOS
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Glenn Need Help w/ 6 Stats Problems Please 1. Why is a 99%
For Mr Glenn Need Help w/ 6 Stats Problems Please 1. Why is a 99% confidence interval wider than a 95% confidence interval? 2. A person claims to be able to predict the outcome of flipping a coin. Thi… read more
GLENN GILONGOS
GLENN GILONGOS
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Random and independent samples of recent prime time airings
Random and independent samples of recent prime time airings from each of two major networks have been considered. The first network aired a mean of commercials during prime time, with a standard devia… read more
Chirag
Chirag
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Chapter 6 00. The average rent in a city is $1,570 per month
Chapter 6 00. The average rent in a city is $1,570 per month with a standard deviation of $200. Assume rent follows the normal distribution. Use the empirical rule to answer the following questions. a… read more
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FOR MR. WHITE b. Interpret the interval in terms of this application.
FOR MR. WHITE b. Interpret the interval in terms of this application. Choose the correct answer below: A. The water department can be 90% confident that the mean lead level of drinking water for all r… read more
Stevewh
Stevewh
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random sample size of 25 from population has mean of 10 and
random sample size of 25 from population has mean of 10 and standard deviation 5. the standard deviation of the sampling distribution of the mean is? for testing the mean, the margin of error of a 90%… read more
Chirag
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FOR GURU2009 ONLY: Assignment number 1: Needed right now! 1. In
FOR GURU2009 ONLY: Assignment number 1: Needed right now! 1. In the standard normal distribution, the standard deviation is always: 2. The area under the standard normal curve is: 3. If Mary gets a 90… read more
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Chirag
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1.) Suppose we wish to estimate the mean of the property tax
1.) Suppose we wish to estimate the mean of the property tax on houses in a certain area from a sample of 32 houses. The point estimate of the the population of houses in the area is 8688.44 Assuming … read more
SusanAthena
SusanAthena
Master's Degree
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1) In the formula for the Confidence Interval for the Mean,
1) In the formula for the Confidence Interval for the Mean, what symbol(s) represents the Confidence Coefficient? 2) If a population has a standard deviation σ of 5 units, what is the standard error o… read more
Sandhya_sharma
Sandhya_sharma
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Pg.431 1)The mean of the sampling distribution of means is
Pg.431 1)The mean of the sampling distribution of means is equal to the mean of the population. T-F, and why or why not? 2) In the formula for the Confidence Interval for the Mean, if the Confidence C… read more
Ryan
Ryan
Bachelor's Degree
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Hello my question for Business statistics is When the sample
Hello my question for Business statistics is When the sample size and sample standard deviation remains the same, a 99% confidence interval for a population mean u will be __ the 95% confidence interv… read more
Scott
Scott
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Master's Degree
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Find the margin of error for the given values of c, s, and
Find the margin of error for the given values of c, s, and n. C=0.95, s=2.3, n=49 E=_________ (Round to three decimal places as needed) Construct the confidence interval for the population mean µ. C= … read more
Stevewh
Stevewh
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1.Assume that the weight loss for the first month of a diet
1.Assume that the weight loss for the first month of a diet program varies between 6 pounds and 12 pounds, and is spread evenly over the range of possibilities, so that there is a uniform distribution… read more
SusanAthena
SusanAthena
Master's Degree
Master's Degree
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Recently, a university surveyed recent grads of the English
Recently, a university surveyed recent grads of the English Dept for their starting salaries. 400 grad students returned the survey. The average salary was 25,000. The population standard deviation is… read more
Math-John
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