Question
In: Statistics and Probability
o test H0:σ=1.2 versus H1: σ≠1.2, a random sample of size n=22 is obtained from a...
o test H0:σ=1.2 versus H1:
σ≠1.2, a random sample of size n=22 is obtained from
a population that is known to be normally distributed.
(a) If the sample standard deviation is
determined to be s=0.8, compute the test
statistic.
(b) If the researcher decides to test this
hypothesis at the α=0.10 level of significance, determine
the critical values.
(c) Will the researcher reject the null
hypothesis? Why?
that's all the question stated
Solutions
orchestra answered 1 year agoRelated Solutions
To test H0 : σ=2.9 versus H1 : σ≠2.9, a random sample of size n=21 is...
To test H0 : σ=2.9 versus H1 : σ≠2.9, a random sample of size
n=21 is obtained from a population that is known to be normally
distributed.
(a) If the sample standard deviation is determined to be
s=2.6, compute the test statistic.
χ^2_0=____
(Round to three decimal places as needed.)
(b) If the researcher decides to test this hypothesis at the
α=0.05 level of significance, determine the critical values.The
critical values are
χ^2_0.025=____ and χ^2_0.975=____.
(Round to three decimal places...
To test H0 : σ=2.9 versus H1 : σ≠2.9, a random sample of size n=21 is...
To test H0 : σ=2.9 versus H1 : σ≠2.9, a random sample of size
n=21 is obtained from a population that is known to be normally
distributed.
(a) If the sample standard deviation is determined to be
s=2.6, compute the test statistic.
χ^2_0=____
(Round to three decimal places as needed.)
(b) If the researcher decides to test this hypothesis at the
α=0.05 level of significance, determine the critical values.The
critical values are
χ^2_0.025=____ and χ^2_0.975=____.
(Round to three decimal places...
To test H0: mu=60 versus H1: mu<60, a random sample size n=25 is obtained from a...
To test H0: mu=60 versus H1: mu<60, a random sample size n=25
is obtained from a population that is known to be normally
distributed. Complete parts a through d below. a) if x bar= 57.4
and s= 14.1, compute the test statistic. b)If the researcher
decides to test this hypothesis at the confidence variable= .1
level of significance, determine the critical value(s). c)draw the
t-distribution that depicts the critical region. d)will the
researcher reject the null hypothesis?
1. To test H0: o=40 versus H1: o< 40, a random sample of sizen=29 is obtained...
1. To test H0: o=40 versus H1: o< 40, a random sample of
sizen=29 is obtained from a population that is known to be normally
distributed.
a. If the sample standard deviation is determined to
be s=36.2, compute the test statistic.
b. If the researcher decides to test this hypothesis at the a=
0.10 level of significance, use technology to determine the
P-value.
c. Will the researcher reject the null hypothesis?
2.To test H0: o=4.9 versus H1: o ≠ 4.9, a...
To test H0: p = 0.65 versus H1: p> 0.65, a simple random sample of n...
To test H0: p = 0.65 versus H1: p> 0.65, a simple random
sample of n = 100 individuals is obtained and x = 69 successes are
observed.
(a) What does it mean to make a Type II error for this
test?
(b) If the researcher decides to test this hypothesis at the alpha
= 0.01 level of significance, compute the probability of making a
Type II error if the true population proportion is 0.70. What is
the power of...
To test H0: ρ = 0 H1: ρ ≠ 0 a random sample of 22 observations...
To test
H0: ρ = 0 H1: ρ ≠ 0
a random sample of 22 observations yielded r = 0.23. What is
your decision at a 0.05 significance level?
a. cannot reject H0 so we cannot say that there is a
correlation.
b. reject H0 so we cannot say that there is no
correlation.
c. reject H0 so there is correlation.
d. reject H0 so we cannot say that there is
correlation
e. cannot reject H0 so there is no...
A simple random sample of size n=37 is obtained from a population with μ=65 and σ=15....
A simple random sample of size n=37 is obtained from a
population with μ=65 and σ=15.
(a) What must be true regarding the distribution of the
population in order to use the normal model to compute
probabilities involving the sample mean? Assuming that this
condition is true, describe the sampling distribution of
overbarx.
(b) Assuming the normal model can be used, determine
P(overbar x < 69.4).
(c) Assuming the normal model can be used, determine
P(overbar x ≥ 66.7).
A simple random sample of size n=64 is obtained from a population with μ=88 and σ=24....
A simple random sample of size n=64 is obtained from a
population with μ=88 and σ=24.
(a) Describe the sampling distribution of x. is it 1,2,3,4, or
5?
1. The distribution is skewed right.
2. The distribution is approximately normal.
3. The distribution is uniform.
4. The distribution is skewed left.
5. The shape of the distribution is
unknown.
Find the mean and standard deviation of the sampling
distribution of x.
Ux=
Ox=
(b) What is P (x>91.75) ? Round...
A simple random sample of size n=49 is obtained from a population with µ=83 and σ=21....
A simple random sample of size n=49 is obtained from a
population with µ=83 and σ=21.
Describe the sampling distribution of x̄, is this distribution
approximately normal. (enter Yes or No)
What is P(x̄>88.1)=
A simple random sample of size n=64 is obtained from a population with μ=77 σ=24. (a)...
A simple random sample of size n=64 is obtained from a
population with μ=77 σ=24.
(a) Describe the sampling distribution of x
(b) What is P (x > 80.75)?
(c) What is P (x ≤ 70.25)?
(d) What is P (74.6<x<83.3)?
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