Question

The size of the standard error is affected by the population
standard deviation and the sample size.

True or False

Answer #1

If the standard deviation of a population is 36 and we take a
sample of size 9, then the standard error (the standard deviation
of the sample mean) is

At a given sample size and level of confidence, the smaller the
population standard deviation σ, the wider and thus the less
precise the confidence interval estimate of µ is.
True or False

1)Given a sample mean is82, the sample size is 100and the
population standard deviation is 20. Calculate the margin of error
to 2 decimalsfor a 90% confidence level.
2)Given a sample mean is 82, the sample size is 100 and the
population standard deviation is 20. Calculate the confidence
interval for 90% confidence level. What is the
lower limit value to 2 decimals?
3)Given a sample mean is 82, the sample size is 100 and the
population standard deviation is...

What sample size is needed to estimate a population mean with a
margin of error of 10 of the true mean value using a confidence
level of 95%, if the true population variance (not the standard
deviation!) is known to be 1600? (10 points)

Question 5 `
If the standard deviation of the population is 15 and the sample
size is 10,000, the standard error will be:
0
.15
.22
.43
1
points
Question 6
If you draw a sample
of 500, you can be confident that the sampling distribution of
means will:
Have a mean of
500.
Will have a standard
error of 50.
Will be heavily
skewed.
Will be a standard
normal curve.

The margin of error for a confidence interval for a population
is equivalent to the standard deviation times the z-score value, or
t-score value depending on the size of the population, for the
probability of interest times the standard deviation of the
population. True or False

1. what effect does increasing the sample size have on the
population standard deviation?
If the sample size increases then the sample standard deviation
will be decreases. But in this sentence, it is not a sample
standard deviation. Every answer in CheggStudy is decrease.
I think sample size doesn't affect to the population standard
deviation.
2. When performing a hypothesis test, what effect does
increasing the sample size have on the probability of type 1
error?
3. When performing a...

A sample of size n = 50 is drawn from a population
whose standard deviation is o= 26. Find the margin of
error for a 90% confidence interval for u.
If the sample size were n= 40, would the margin of error be larger
or smaller

Calculate the margin of error for the population mean using
sample data: sample standard deviation s = 14, sample size N = 49.
Use significance level alpha = 0.05.

A sample of size 9 was taken from some population, and the
sample standard deviation was 5. The confidence interval for the
true mean came out to be ( 23.4 , 29.6 ). What was the confidence
level?

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