The amount of trash generated by US households (in lbs per day) is Normally distributed. You a random sample of 8 people gives you an average of 10.00 lbs and a sample stdev of 5 lbs. What is the margin of error for a 99% Conf. Int. for the mean? (Leave your answer to two decimal places.)
Solution :
Given that,
t
/2,df = 3.499
Margin of error = E = t
/2,df
* (s /
n)
= 3.499 * (5 /
8)
Margin of error = E = 6.19
The amount of trash generated by US households (in lbs per day) is Normally distributed. You...
The amount of coffee that people drink per day is normally distributed with a mean of 16 ounces and a deviation of 5.5 ounces. 32 random possible standard ly selected people are surveyed. Round all answers to 4 decimal places where a, what is the distribution of X? X-N(16-55 b. What is the distribution of #? z N 169727 e What is the probability that one randomly selected person drinks berween 15.7 and 165 ounces of coffe per day? d....
The amount of coffee that people drink per day is normally distributed with a mean of 15 ounces and a standard deviation of 6 ounces. 13 randomly selected people are surveyed. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X-N b. What is the distribution of m?T-NG c. What is the probability that one randomly selected person drinks between 14 and 16 ounces of coffee per day? d. For the 13 people,...
The amount of coffee that people drink per day is normally
distributed with a mean of 16 ounces and a standard deviation of 5
ounces. 18 randomly selected people are surveyed. Round all answers
to 4 decimal places where possible.
I don't have a calculator so I have been doing this in Excel. If
I can get the explanation using excel that would be great!
The amount of coffee that people drink per day is normally distributed with a mean...
The weight of men of a certain age is normally distributed with mean 210 lbs and standard deviation 2.5 lbs. A random sample of 36 men is taken. Find the probability that the average weight is less than 205 lbs.
The amount of coffee that people drink per day is normally distributed with a mean of 16 ounces and a standard deviation of 4.5 ounces. 9 randomly selected people are surveyed. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X-N b. What is the distribution of a? T-N c. What is the probability that one randomly selected person drinks between 15.5 and 17.5 ounces of coffee per day? d. For the 9...
25> Consider a variable known to be Normally distributed with unknown mean μ and known standard deviation σ-10. (a) what would be the margin of error of a 95% confidence interval for the population mean based on a random sample size of 25? The multiplier for a z confidence interval with a 95% confidence level is the critical value z. 1.960. (Enter your answer rounded to three decimal places.) margin of error 25 (b) What would be the margin of...
The fill amount of bottles of a soft drink is normally distributed, with a mean of 2.0 liters and a standard deviation of 0.05 liter. If you select a random sample of 25 bottles, what is the probability that the sample mean will be between 1.99 and 2.0 liters? below 1.98 liters? greater than 2.01 liters? The probability is 99% that the sample mean amount of soft drink will be at least how much? The probability is 99% that the...
please help! stabdard error!
The weight of people in Ozark, Arkansas is normally distributed with a population mean of 185 pounds with a population standard deviation of 25 pounds. 1. What is the standard error of the mean for a random sample of 16 people from Ozark, Ark? 2. How many people must be sampled to decrease the standard error of the mean to 5? 3. What is the probability of the average weight of 16 people in Ozark picked...
please round to 4 decimal places
The amount of coffee that people drink per day is normally distributed with a mean of 16 ounces and a standard deviation of 5 ounces. 15 randomly selected people are surveyed. Round all answers to 4 decimal places where possible. What is the distribution of X? X N b. What is the distribution of 7 -N c. What is the probability that one randomly selected person drinks between 15.5 and 17 ounces of coffee...
A simple random sample of 24 observations is derived from a normally distributed population with a known standard deviation of 7.8. [You may find it useful to reference the z table.] a. Is the condition that X−X− is normally distributed satisfied? Yes No b. Compute the margin of error with 99% confidence. (Round intermediate calculations to at least 4 decimal places. Round "z" value to 3 decimal places and final answer to 2 decimal places.) Margin error: ? c. Compute...