Question
In: Statistics and Probability
Discuss how P-values are used in the test of a hypothesis about Proportions ( percentages) You...
Discuss how P-values are used in the test of a hypothesis about Proportions ( percentages) You may use a specific example
Solutions
orchestra answered 1 year agoRelated Solutions
What is a p-value and how is it used to make a decision about the null hypothesis?
What is a p-value and how is it used to make a decision about the null hypothesis?
How is the p-value related to the test statistic?
Explain whether or not rejecting the null hypothesis makes the alternative hypothesis true and why.
If I conduct a hypothesis testing with Type I error set at 0.05 and a resulting p-value of 0.3, what would my conclusion be?
Q2. Proportions (percentages) in a Z Distribution A large population of scores from a standardized test...
Q2. Proportions (percentages) in a Z
Distribution
A large population of scores from a standardized test are
normally distributed with a population mean (μ) of 50 and a
standard deviation (σ) of 5. Because the scores are normally
distributed, the whole population can be converted into a Z
distribution. Because the Z distribution has symmetrical bell shape
with known properties, it’s possible to mathematically figure out
the percentage of scores within any specified area in the
distribution. The Z table...
Test the following claim. Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the...
Test the following claim. Identify the null hypothesis,
alternative hypothesis, test statistic, P-value, conclusion about
the null hypothesis, and final conclusion that addresses the
original claim. A simple random sample of 60 screws supplied by a
certain manufacturer is obtained, and the length of each screw is
measured. The sample mean is found to be 0.622 in. Assume that the
standard deviation of all such lengths is 0.016 in, and use a 0.01
significance level to test the claim that...
A bus company wants to test the hypothesis that the proportions of the six types of...
A bus company wants to test the hypothesis that the
proportions of the six types of passengers it carries on a certain
route are EQUAL. The six types are: commuters, shoppers, college
students, tourists, children, and mall employees. it carries on a
certain route are EQUAL. The six types are: commuters, shoppers,
college students, tourists, children, and mall employees. On the
basis of the following sample of four hundred eighty bus riders,
should the company accept this hypothesis at the...
Hypothesis Testing and Confidence Intervals for Proportions and Hypothesis Test for Difference between Two Means A...
Hypothesis Testing and Confidence Intervals for Proportions and
Hypothesis Test for Difference between Two Means
A pharmaceutical company is testing a new cold medicine to
determine if the drug has side affects. To test the drug, 8
patients are given the drug and 9 patients are given a placebo
(sugar pill). The change in blood pressure after taking the pill
was as follows:
Given drug: 3 4 5 1 -2 3 5 6
Given placebo: 1 -1 2 7 2...
Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final...
Identify the null hypothesis, alternative hypothesis,
test statistic, P-value, conclusion about the
null hypothesis, and final conclusion that addresses
both the claim and the significance level
alpha. Use the P-value method.
A sample of 17 jellybeans with a mean weight of 0.8295 g was
taken. Assume that
σ is known to be 0.0565 g. Consider a hypothesis test that uses
a 0.05 significance level
to test the claim that the mean weight of all jellybeans is
equal to 0.8550 g...
Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final...
Identify the null hypothesis, alternative hypothesis, test
statistic, P-value, conclusion about the null hypothesis, and final
conclusion that addresses the original claim.
Various temperature measurements are recorded at different times
for a particular city. The mean of 20°C is obtained for 60
temperatures on 60 different days. Assuming that test the claim
that the population mean is 22°C . Use a 0.05 significance level.
Testing Hypothesis Z-Table
Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final...
Identify the null hypothesis, alternative hypothesis,
test statistic, P-value, conclusion about the null hypothesis, and
final conclusion that addresses the original claim.
a) A poll of 1068 adult Americans reveals that 48% of the voters
surveyed prefer the Democratic candidate for the presidency. At the
0.05 level of significance, test the claim that at least half of
all voters prefer the Democrat.
b) In a sample of 167 children selected randomly from one town,
it is found that 37 of...
Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final...
Identify the null hypothesis, alternative hypothesis,
test statistic, P-value, conclusion about the null hypothesis, and
final conclusion that addresses the original claim. Use the P-value
method.
Use the given data set of x and y values to answer the following
questions. x-values 1 1 1 2 2 2 3 3 3 9 y-values 8 9 10 8 9 10 8 9
10 2
(a) Use StatCrunch to find the regression equation, ˆy = b0 +
b1x and the sample correlation...
Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final...
Identify the null hypothesis, alternative hypothesis,
test statistic, P-value, conclusion about the null hypothesis, and
final conclusion that addresses the original claim. Use the P-value
method.
Listed below are ages of actresses and actors from a country at
the times that they won a certain award. The data are paired
according to the years that they won. Use a 0.01 significance level
to test the belief that best actresses are younger than best
actors. Does the result suggest a problem...
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