Checking accounts at a certain bank have a mean balance of $664.14 and a standard deviation...
Checking accounts at a certain bank have a mean balance of $664.14 and a standard deviation of $297.29. If a random sample of 34 accounts is selected, describe the sampling distribution of sample means.
μx=
σx=
Homework Answers
Here the mean =664.14
Sigma=297.29
n=34 so the sampling distribution of sample means will be normal by central limit theorem.
Where ux=664.14
Sigmax=297.29/sqrt(34)=50.9848
Add Answer to:
Checking accounts at a certain bank have a mean balance
of $664.14 and a standard deviation...
The average salary for a certain profession is$ 69,000. Assume that the standard deviation of such...
The average salary for a certain profession is$ 69,000. Assume that the standard deviation of such salaries is $ 39,500. Consider a random sample of 68 people in this profession and let x over bar x represent the mean salary for the sample. a. What is mu Subscript x over bar μx ? mu Subscript x over bar μx =________ b. What is sigma Subscript x over bar σx ? sigma Subscript x over bar σx =__________ (Round to...
Suppose x has a distribution with a mean of 50 and a standard deviation of 27....
Suppose x has a distribution with a mean of 50 and a standard deviation of 27. Random samples of size n = 36 are drawn. (a) Describe the x distribution and compute the mean and standard deviation of the distribution. x has distribution with mean μx = and standard deviation σx = . (b) Find the z value corresponding to x = 41. z = (c) Find P(x < 41). (Round your answer to four decimal places.) P(x < 41)...
Suppose x has a distribution with a mean of 90 and a standard deviation of 3....
Suppose x has a distribution with a mean of 90 and a standard deviation of 3. Random samples of size n = 36 are drawn. (a) Describe the x distribution and compute the mean and standard deviation of the distribution. x has ---Select--- a normal a geometric an unknown a Poisson a binomial an approximately normal distribution with mean μx = and standard deviation σx = . (b) Find the z value corresponding to x = 91. z = (c) Find P(x...
Let X represent the full height of a certain species of tree. Assume that X has...
Let X represent the full height of a certain species of tree.
Assume that X has a normal probability distribution with mean 33.7
ft and standard deviation 19.7 ft.
You intend to measure a random sample of n=113 trees. The bell
curve below represents the distribution of these sample means. The
scale on the horizontal axis is the standard error (standard
deviation) of the sampling distribution. Complete the indicated
boxes, correct to two decimal places.
μx¯=
σx¯=
A population has a mean μ=87 and a standard deviation σ=30. Find the mean and standard...
A population has a mean μ=87 and a standard deviation σ=30. Find the mean and standard deviation of a sampling distribution of sample means with sample size n=249. μx= ?????
A population has a mean μ=71 and a standard deviation σ=27. Find the mean and standard...
A population has a mean μ=71 and a standard deviation σ=27. Find the mean and standard deviation of a sampling distribution of sample means with sample size n=81. μx=_____ (Simplify your answer.)
A group of friends has gotten very competitive with their board game nights. They have found...
A group of friends has gotten very competitive with their board game nights. They have found that overall, they each have won an average of 18 games, with a population standard deviation of 6 games. If a sample of only 2 friends is selected at random from the group, select the expected mean and the standard deviation of the sampling distribution from the options below. Remember to round to the nearest whole number. Select all that apply: A.) σx¯=6 games...
Suppose x has a distribution with a mean of 70 and a standard deviation of 27....
Suppose x has a distribution with a mean of 70 and a standard deviation of 27. Random samples of size n = 36 are drawn. (a) Describe the x distribution and compute the mean and standard deviation of the distribution. x has distribution ___________ with mean μx = _______ and standard deviation σx = __________. (b) Find the z value corresponding to x = 79. z = (c) Find P(x < 79). (Round your answer to four decimal places.) P(x...
Patty, a branch manager of a bank, would like a quick estimate of the mean checking account balance of all checking account customers. A random sample of checking 32 account balances results in a sample mean of $312,590.50 and a standard deviation of $52,
Patty, a branch manager of a bank, would like a quick estimate of the mean checking account balance of all checking account customers. A random sample of checking 32 account balances results in a sample mean of $312,590.50 and a standard deviation of $52,100. Calculate and interpret a 95% confidence interval for the mean checking account balance. Round off all answers to two decimal places with complete solutions.
A random sample of 144 checking accounts at a bank showed an average daily balance of...
A random sample of 144 checking accounts at a bank showed an average daily balance of $295. The standard deviation of the population is known to be $72. Please answer the following questions: (a) Find the standard error of the mean. (b) Give a point estimate of the population mean. (c) Construct a 95% confidence interval estimates for the mean.
Let X represent the full height of a certain species of tree.
Assume that X has a normal probability distribution with mean 33.7
ft and standard deviation 19.7 ft.
You intend to measure a random sample of n=113 trees. The bell
curve below represents the distribution of these sample means. The
scale on the horizontal axis is the standard error (standard
deviation) of the sampling distribution. Complete the indicated
boxes, correct to two decimal places.
μx¯=
σx¯=
Most questions answered within 3 hours.
-
In this exercise, we will be refactoring a working program. Code
refactoring is a process to...
asked 51 minutes ago -
3
researchers at Cambrige looked at 5,000 firms in Englans and found
that, in terms of...
asked 35 minutes ago -
why it is important and how it integrates within ERP? And what
the core challenges of...
asked 2 hours ago -
A strawberry farmer determines that the average weight of
individual strawberries produced by plants in his...
asked 2 hours ago -
Chargaff's results yielded a molar ratio of 0.400 for A to G in
avian tubercle bacillus...
asked 5 hours ago -
Which of the following binds ATP/ADP?
a. microfilaments
b. microtubules
c. intermediate filaments
d. microfilaments and...
asked 5 hours ago -
Assume that the situation can be expressed as a linear cost
function. Find the cost function....
asked 6 hours ago -
(Sort ArrayList) Write the following method that sorts an
ArrayList: public static > void sort(ArrayList list)...
asked 7 hours ago -
2) A 9 volt battery is connected to a parallel plate capacitor
with an initial capacitance...
asked 6 hours ago -
Prince Equipment has to decide whether to obtain $1,000,000 of
financing by: (1) selling common stock...
asked 8 hours ago -
The terms electrical and electronic have similar but
different meanings which of the following statement is...
asked 8 hours ago -
You wish to test the claim that the mean GPA of night students
is than 2.5...
asked 8 hours ago