Question
In: Statistics and Probability
Assume that we want to construct a confidence interval. Do one of the following, as appropriate:...
Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value
t Subscript alpha divided by 2tα/2,
(b) find the critical value
z Subscript alpha divided by 2zα/2,
or (c) state that neither the normal distribution nor the t distribution applies.Here are summary statistics for randomly selected weights of newborn girls:
nequals=243243,
x overbarxequals=29.329.3
hg,
sequals=6.56.5
hg. The confidence level is
9999%.
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A.
t Subscript alpha divided by 2tα/2equals=nothing
(Round to two decimal places as needed.)
B.
z Subscript alpha divided by 2zα/2equals=nothing
(Round to two decimal places as needed.)
C.
Neither the normal distribution nor the t distribution applies.
Solutions
orchestra answered 2 years agoRelated Solutions
Assume that we want to construct a confidence interval. Do one of the following, as appropriate:...
Assume that we want to construct a confidence interval. Do one
of the following, as appropriate: (a) find the critical value
t Subscript alpha divided by 2tα/2,
(b) find the critical value
z Subscript alpha divided by 2zα/2,
or (c) state that neither the normal distribution nor the t
distribution applies.Here are summary statistics for randomly
selected weights of newborn girls:
nequals=243243,
x overbarxequals=29.329.3
hg,
sequals=6.56.5
hg. The confidence level is
9999%.
Select the correct choice below and, if necessary,...
Assume that we want to construct a confidence interval. Do one of the following, as appropriate:...
Assume that we want to construct a confidence interval. Do one
of the following, as appropriate: (a) find the critical value t
Subscript alpha divided by 2, (b) find the critical value z
Subscript alpha divided by 2, or (c) state that neither the
normal distribution nor the t distribution applies. Here are
summary statistics for randomly selected weights of newborn girls:
nequals290, x overbarequals31.9 hg, sequals6.1 hg. The confidence
level is 90%. Thank you in advance!
Assume that we want to construct a confidence interval. Do one of the following, as appropriate:...
Assume that we want to construct a confidence interval. Do one
of the following, as appropriate: (a) find the critical value t
Subscript alpha divided by tα/2, (b) find the critical value z
Subscript alpha divided by zα/2, or (c) state that neither the
normal distribution nor the t distribution applies. Here are
summary statistics for randomly selected weights of newborn girls:
n= 177, overbarx= 32.7 hg, s = 6.2 hg. The confidence level is
99%.
Select the correct choice...
Assume that we want to construct a confidence interval. Do one of the following, as appropriate:...
Assume that we want to construct a confidence interval. Do one
of the following, as appropriate: (a) find the critical value t
alpha/ 2, (b) find the critical value z Subscript alpha/02, or
(c) state that neither the normal distribution nor the t
distribution applies. Here are summary statistics for randomly
selected weights of newborn girls: n=291, x over b+31.3 hg,
s=7.6 hg. The confidence level is 90%.
Assume that we want to construct a confidence interval. Do one of the following, as appropriate:...
Assume that we want to construct a confidence interval. Do one
of the following, as appropriate: (a) find the critical value
tα/2, (b) find the critical value zα/2, or (c) state that
neither the normal distribution nor the t distribution applies.
Here are summary statistics for randomly selected weights of
newborn girls: n=151 x = 29.1 hg S =7.6 hg The confidence level is
95%. Select the correct choice below and, if necessary, fill in
the answer box to complete...
We want to construct a 95% confidence interval to estimate p t − p c using...
We want to construct a 95% confidence interval to estimate p t −
p c using the sample data in the table below. Assume that p is the
proportion who tested positive.
Treatment
Control
Total
Positive
4
8
12
Negative
80
86
166
Total
84
94
178
Is it appropriate to use the z distribution to approximate the
sampling distribution when constructing this confidence
interval?
Group of answer choices
Yes, the z distribution may be used
No, the z distribution...
If you are given summary statistics for a sample and want to construct a confidence interval,...
If you are given summary statistics for a sample and want to
construct a confidence interval, this can be done through the
Probability Calculator in Geogebra. Open it and click the
“Statistics” tab just above the graph. For a confidence interval
for a population mean, with unknown σ, click the drop-down menu
near the top (default is “Z Test of a Mean”) and choose “T Estimate
of a Mean.” Enter the confidence level (in decimal form), sample
mean, sample standard...
1) You want to construct a 92% confidence interval. The correct z* to use is A)...
1) You want to construct a 92% confidence interval. The correct
z* to use is
A) 1.645
B) 1.41
C) 1.75
2) Suppose the average Math SAT score for all students taking
the exam this year is 480 with standard deviation 100. Assume the
distribution of scores is normal. The senator of a particular state
notices that the mean score for students in his state who took the
Math SAT is 500. His state recently adopted a new mathematics
curriculum,...
How do we interpret a confidence interval?
How do we interpret a confidence interval?
1. If we want to provide a 91% confidence interval for the mean of a population, __ is the confidence coefficient.
1. If we want to provide a 91% confidence interval for the mean of a population, __ is the confidence coefficient.
a) 1.7 b) .09 c) .045 d).91
2. When we calculate a confidence interval for the sampling distribution of bar and the standard deviation of the normally distributed population is unknown...
a) we use s for o and use the t-distibution b) we cannot calculate a confidence interval c)none of the above is correct
3. When calculating a...
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