Question
In: Math
1. How did you construct the confidence interval (put the formula into words) and Please mention...
1. How did you construct the confidence interval (put the formula into words) and Please mention how to find your critical values
2. . And then I need two comparisons/contrasts: compare the 90% and 95% confidence intervals within a group, is one longer than the other? If so, why?
3. Finally, compare the 95% confidence intervals across groups. Is there any overlap in the intervals or is one interval completely greater than the other?
mean: 24025.4 (NY) and 12247.21 (TX)
std. deviation: 16049.05(NY) and 9448.70(TX) respectively
And sample size n=50 for both
Solutions
milcah answered 11 months agoRelated Solutions
Distinguish between point estimate and confidence interval. How do you construct confidence interval when population SD...
Distinguish between point estimate and
confidence interval. How do you construct confidence interval when
population SD is known and unknown?
1.Construct the confidence interval for μ 1 − μ 2 for the level of confidence and...
1.Construct the confidence interval for μ 1 − μ 2 for the level
of confidence and the data from independent samples given. 95%
confidence: n 1 = 110, x - 1 = 77, s 1 = 15 n 2 = 85, x - 2 = 79, s
2 = 21 90% confidence: n 1 = 65, x - 1 = − 83, s 1 = 12 n 2 = 65, x
- 2 = − 74, s 2 = 8...
How do you construct a confidence interval for a t test and a z test?
How do you construct a confidence interval for a t test and a z
test?
1. State the assumptions 2. State the appropriate confidence interval formula 3. find the confidence interval...
1. State the assumptions
2. State the appropriate confidence interval formula 3. find
the confidence interval via calculator
4. write a full sentence for this interval
5. interpret the interval
Psychologists have found that twins, in their early years,
tend to have lower intel- ligence and pick up languages more slowly
than nontwins. The slower intellectual growth of twins may be
caused by benign parental neglect. Suppose we want to investigate
this phe- nomenon. A random sample of 50 sets...
1.You are to construct a 97% confidence interval. The population is normally distributed and the "population...
1.You are to construct a 97% confidence interval. The population
is normally distributed and the "population standard deviation" is
known to be 42. You will take a random sample of size 38. The
margin of errors is = Please enter your response rounded to TWO
places of decimal at the final step of the calculation.
2.You are to construct a 90% confidence interval for the mean of
a normally distributed population. The population standard
deviation is unknown. The 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,...
2.Construct the confidence interval for μ 1 − μ 2 for the level of confidence and...
2.Construct the confidence interval for μ 1 − μ 2 for the level
of confidence and the data from independent samples given. 90%
confidence: n 1 = 28, x - 1 = 212, s 1 = 6 n 2 = 23, x - 2 = 198, s
2 = 5 99% confidence: n 1 = 14, x - 1 = 68, s 1 = 8 n 2 = 20, x - 2
= 43, s 2 = 3
Construct a confidence interval for p 1 minus p 2 at the given level of confidence....
Construct a confidence interval for
p 1 minus p 2
at the given level of confidence.
x 1 equals
379
,
n 1 equals
506
,
x 2 equals
421
,
n 2 equals
559
,
95
%
confidence
The
95
%
confidence interval for
p 1 minus p 2
is
(nothing
,nothing).
Construct a confidence interval for p 1 minus p 2 at the given level of confidence....
Construct a confidence interval for p 1 minus p 2 at the given
level of confidence. x 1 equals29, n 1 equals241, x 2 equals31,
n 2 equals312, 90% confidence
1. Explain with words and steps how to create a confidence interval for estimating the true...
1. Explain with words and steps how to create a confidence
interval for estimating the true value of the population mean of
the number of cars owned by Beverly Hills households. Don't forget
to write an interpretation of the confidence interval. The sample
results were:
a. Sample size of 100 people.
a. Sample average was 5.2.
a. Sample standard deviation was 2.8.
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