The value of (1 - alpha) is called
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Confidence Coefficient
t distribution
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A distribution specified by degrees of freedom used to
model test statistics for the sample mean, differences
between sample means
,In testing H0: μ = 23; versus HA: μ > 23 using the critical value rule, when xbar= 26, s=6,
n=20, what is the value of the test statistic? Assume the population from which the
sample is selected is normally distributed.
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(26- 23)/ (6/√20)= 2.24
________ values of the standard deviation results in a normal curve that is wider and
flatter
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Larger
The exact spread of the t distribution depends on the
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Degrees of Freedom
The specific shape of each normal distribution is determined by its
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, Mean and Standard Deviation.
Uniform distribution
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A continuous probability distribution curve that has a rectangular shape,
where the probability is evenly distributed over an interval of numbers.
-F(x)= 1/d-c
Confidence Interval Formula
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- Phat +- Z(a/2) x √(phat(1 -phat)/n)
- [x-bar +- Z(a/2) x (standard deviation/ √n)]
Degrees of freedom
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n-1
In a manufacturing process, a random sample of 36 manufactured bolts has a mean
length of 3 inches with a standard deviation of .3 inches. What is the 99 percent
confidence interval for the true mean length of the manufactured bolt?
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Confidence Coefficient
t distribution
Give this one a try later!
A distribution specified by degrees of freedom used to
model test statistics for the sample mean, differences
between sample means
,In testing H0: μ = 23; versus HA: μ > 23 using the critical value rule, when xbar= 26, s=6,
n=20, what is the value of the test statistic? Assume the population from which the
sample is selected is normally distributed.
Give this one a try later!
(26- 23)/ (6/√20)= 2.24
________ values of the standard deviation results in a normal curve that is wider and
flatter
Give this one a try later!
Larger
The exact spread of the t distribution depends on the
Give this one a try later!
Degrees of Freedom
The specific shape of each normal distribution is determined by its
Give this one a try later!
, Mean and Standard Deviation.
Uniform distribution
Give this one a try later!
A continuous probability distribution curve that has a rectangular shape,
where the probability is evenly distributed over an interval of numbers.
-F(x)= 1/d-c
Confidence Interval Formula
Give this one a try later!
- Phat +- Z(a/2) x √(phat(1 -phat)/n)
- [x-bar +- Z(a/2) x (standard deviation/ √n)]
Degrees of freedom
Give this one a try later!
n-1
In a manufacturing process, a random sample of 36 manufactured bolts has a mean
length of 3 inches with a standard deviation of .3 inches. What is the 99 percent
confidence interval for the true mean length of the manufactured bolt?
