Question
In: Statistics and Probability
Two samples, one of size 13 and the second of size 18, are selected to test...
Two samples, one of size 13 and the second of size 18, are selected to test the difference between two population means and σ is unknown.
Which distribution should be used for this test?
What is the critical value for a 10% level of significance for a right tail test?
Solutions
orchestra answered 2 years agoRelated Solutions
Calculate the test statistic F to test the claim that = . Two samples are randomly selected...
Calculate the test statistic F to test the claim that =
. Two samples are randomly selected from populations that are
normal. The sample statistics are given below.
n1 = 25 n2 = 30
= 7.942 = 4.95
indicate the formulas for finding the degrees of freedom for: One-sample t-test Two independent-samples t-test Paired-samples...
indicate the formulas for finding the degrees of freedom
for:
One-sample t-test
Two independent-samples t-test
Paired-samples t-test
2.2. Indicate which test (paired samples (ie dependent) t-test, independent two samples t-test, one-sample t-test, independent...
2.2. Indicate which test (paired samples (ie dependent) t-test,
independent two samples t-test, one-sample t-test, independent
samples z-test) is most appropriate for the following situations :
A. Comparison of weight gain of two groups of 18 cows where one
group was raised following standard practices and the other group
was raised following “organic” standards.
B. Comparison of scores on a fitness test of Olympic-class
distance runners (n=20) with the national average score of people
of a similar age range (22-31...
a) What are the similarities (state one) and differences (state two) between the two-samples t-Test and...
a) What are the similarities (state one) and differences
(state two) between the two-samples t-Test and the
ANOVA?
b) Chi-Square Tests is one of those tests that are both
parametric and non-parametric depending on what one intends to do.
What is the difference between Chi-square test (as parametric and
Chi-square (as non-parametric)?
Use the population {3,4,6} and assume that samples of size 2 are randomly selected, with replacement....
Use the population {3,4,6} and assume that samples of size 2 are
randomly selected, with replacement.
?) For the population, find the proportion of odd numbers
?) Construct a table for the sampling distribution of the sample
proportions of odd numbers.
?) Find the mean of the sampling distribution of the sample
proportion of odd numbers.
?) Is the sample proportion an unbiased estimator or a biased
estimator of the population proportion? why?
use the population {3,4,6} and assume that samples of size 2 are randomly selected, with replacement....
use
the population {3,4,6} and assume that samples of size 2 are
randomly selected, with replacement. a) for the population, find
the proportion of odd numbers. b) construct a table for sampling
distribution of the sample proportion of odd numbers. c) find the
mean of sampling distribution of the sample proportion of odd
numbers. d) is the sample proportion and unbiased estmator or.
biased estimator of the population? Why?
Two random samples are selected from two independent populations. A summary of the samples sizes, sample...
Two random samples are selected from two independent
populations. A summary of the samples sizes, sample means, and
sample standard deviations is given below:
n1=37,n2=44,x¯1=58.9,x¯2=74.7,s1=5.5s2=10.1 n 1 =37, x ¯ 1 =58.9, s
1 =5.5 n 2 =44, x ¯ 2 =74.7, s 2 =10.1 Find a 95.5% confidence
interval for the difference μ1−μ2 μ 1 − μ 2 of the means, assuming
equal population variances. Confidence Interval
Two random samples are selected from two independent populations. A summary of the samples sizes, sample...
Two random samples are selected from two independent
populations. A summary of the samples sizes, sample means, and
sample standard deviations is given below:
n1=39,n2=48,x¯1=52.5,x¯2=77.5,s1=5s2=11 Find a 97.5% confidence
interval for the difference μ1−μ2 of the means, assuming equal
population variances. Confidence Interval =
Random samples of size n = 90 were selected from a binomial population with p =...
Random samples of size n = 90 were selected from a
binomial population with p = 0.8. Use the normal
distribution to approximate the following probability. (Round your
answer to four decimal places.)
P(p̂ > 0.78) =
Random samples of size n = 60 were selected from a binomial population with p =...
Random samples of size n = 60 were selected from a
binomial population with p = 0.2. Use the normal
distribution to approximate the following probabilities. (Round
your answers to four decimal places.)
(a)
P(p̂ ≤ 0.22) =
(b)
P(0.18 ≤ p̂ ≤ 0.22) =
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