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Hypothesis Testing
Page 8
Questions (2,043)
The international Coffee Association has reported the mean daily coffee consumption for U.S. residents as 1.65 cups. Assume that
3 answers
asked by
Julia Brown
727 views
A sample of 40 observations is selected from one approximately normal population. The sample mean is 102 and the sample standard
2 answers
asked by
K
709 views
The manager of a service station is in the process of analyzing the number of times car owners change the oil in their cars. She
4 answers
asked by
iyra
1,437 views
Question 1
Question 1 1. Question 1 text The head of the History Department wants to compare the averages of 2 different
2 answers
asked by
jeff
627 views
A researcher conducts a t test for dependent means in which it is predicted that there will be a decrease in unemployment from
3 answers
asked by
stat
607 views
Joe asked all of the students in his class if they liked pizza or not, and wrote down their answers. Was this a scientific
5 answers
asked anonymously
54 views
In a one-way ANOVA, there are three independent samples, with n1 8, n2 = 10, and n3 = 7. The calculated F-statistic is F = 3.95.
3 answers
asked by
Danny
954 views
for a sample of 12 items from a normally distributed population for which the standard deviation is = 17.0, the sample mean
3 answers
asked by
Candy
971 views
A chi-square test for independence with 8 degrees of freedom results in a test statistic of 18.21. Using the chi-square table,
3 answers
asked by
Stuart
1,071 views
2. The time (in number of days) until maturity of a certain variety of hot pepper is normally distributed, with mean m and
4 answers
asked by
Latoya
1,382 views
The value of the z-score that is obtained for a hypothesis test is influenced by several factors. Some factors influence the
3 answers
asked by
Tyler
1,348 views
search study: Do red uniform wearers tend to win more often than those wearing blue uniforms in
Taekwondo matches where
2 answers
asked anonymously
40 views
A scientist finds that her hypothesis is not supported by the data she gathered as a result of her experiment. What conclusion
2 answers
asked anonymously
67 views
A study by Hewitt Associates showed that 79% of companies offer employees flexible scheduling. Suppose a researcher believes
5 answers
asked by
John Barclaey
2,871 views
20. Explain how the power of a hypothesis test is
influenced by each of the following. Assume that all other factors are held
4 answers
asked by
melissa
2,478 views
A sample of 30 trees has a standard deviation of 0.8m. Test the hypothesis that this result is less than the theoretical value
2 answers
asked anonymously
54 views
It is known that the mean size of commercial loans made by a certain bank has been R120 000 in the recent past. A new change in
2 answers
asked anonymously
54 views
A buyer wants to determine whether the mean sugar content per orange shipped from a particular grove is 2.4 grams. A random
2 answers
asked anonymously
46 views
A manufacturer of candy must monitor the temperature at which the sweets are baked. Too much variation will cause inconsistency
2 answers
asked anonymously
28 views
A pharmaceutical company claims that a certain drug causes 80% of people to recover from a disease. Out of 200 people who were
7 answers
asked anonymously
47 views
A new medical company claims that less than 70% of the workers at ABSA are satisfied with their new medical scheme. A random
2 answers
asked anonymously
50 views
The ages of competitors in a grandmaster chess tournament is under dispute. The National Chess League (NCL) claims that the
2 answers
asked anonymously
51 views
It is claimed that 90% of the students in STSA 1 class will pass their test. After the test a random sample of 50 students shows
2 answers
asked anonymously
53 views
the IQ’s of 20 students are tested and it is found that the average IQ is 117 with a variance of 121. Test H0:µ = 110 vs
2 answers
asked anonymously
50 views
It is claimed that 90% of the students in STSA 1 class will pass their test. After the test a random sample of 50 students shows
2 answers
asked anonymously
51 views
A consumer group wants to know if an automobile insurance company with thousands of customers has an average insurance payout
3 answers
asked by
Anonymous
3,880 views
When is a hypothesis useful in science?(1 point)
Responses When it can be tested. When it can be tested. When the explanation is
2 answers
asked by
wyatt
42 views
Fisher's Exact Test p-value
Fisher's Exact Test provides a method based on the hypergeometric distribution to test hypotheses of
2 answers
asked anonymously
54 views
Continue with the likelihood ratio test for the HIP experiment.
What is the p-value of the likelihood ratio test based on the
2 answers
asked anonymously
66 views
In this section, we will discuss a popular and versatile approach to hypothesis testing on continuous data, the z-test , which
2 answers
asked anonymously
42 views
Reproduce the Fisher's exact test for the mammography study.
What is the p-value given the observed data? (Please enter the value
2 answers
asked anonymously
38 views
iven the total number of deaths is n = 102, and assuming the the null hypothesis H_0: \pi _{treatment} = \pi _{control} is true,
2 answers
asked anonymously
34 views
3. Which of the following statement(s) is/are true?
Once we set \mathbf{P}(Type I error), \mathbf{P}(Type II error) is
2 answers
asked anonymously
43 views
The scientists are likely to make a large number of observations and save the observations they can use to make a testable
2 answers
asked by
Quentin
71 views
A scientist finds that her hypothesis is not supported by the data she gathered as a result of her experiment. What conclusion
2 answers
asked anonymously
200 views
Fifty two of a test panel of 175 consumers say that they would buy cereal A if it is presented on the market and 35 of another
2 answers
asked anonymously
40 views
Which of the following would be a testable hypothesis?(1 point)
If acid is added to a solution, then the pH of the solution will
2 answers
asked by
yummers
42 views
Which of the following would be a testable hypothesis?(1 point)
Responses If acid is added to a solution, then the pH of the
2 answers
asked anonymously
62 views
@bot Which of the following would be a testable hypothesis?(1 point)
Responses If acid is added to a solution, then the pH of the
7 answers
asked by
PAtato
124 views
Light bulbs supplied by a certain company have a length life that is approximately normally distributed, with the standard
2 answers
asked anonymously
48 views
15. Are the results consistent with the null hypothesis?
a. Yes b. No
1 answer
asked by
Rondezy
45 views
What is level of significance
1 answer
asked by
Shafii
56 views
Steps for testing null hypothesis and altenative hypothesis
1 answer
asked by
Evaristi Paulo
84 views
Steps for testing hypothesis
1 answer
asked by
Evaristi Paulo
62 views
Thefollowingregressionequationforquantitysuppliedwasestimatedusinga
sampleoffifty observations. Standard errors are in the
1 answer
asked by
myn
43 views
Approaches of test statistics
1 answer
asked by
Elizabeth
61 views
Analysis of variance
1 answer
asked by
Evodius ndibalema
63 views
Type II error
1 answer
asked by
Evodius ndibalema
50 views
The following regression equation for quantity supplied was estimated
using a sample of fiftyobservations. Q= 2.2 + 0.104P. (3.4)
1 answer
asked by
Evaristi Paulo
79 views
How to test hypothesis
1 answer
asked by
Evaristi Paulo
92 views
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