In a (hypothetical) question such as "a study shows that on average, more than 45% of men go shopping. To test the claim a sample of 10 men were randomly selected, which revealed a mean of 50%, whilst the standard deviation was found to be 20%." Is the alternative hypothesis in this case one-sided or two-sided?|||This would be one-sided, because you are testing if MORE than 45% of men go shopping.
If it were "The percentage of men that go shopping DIFFERS SIGNIFICANTLY from 45%", that would be two-sided, because you don't care about whether the actual number is higher or lower.|||that would be one-sided.
Sunday, December 4, 2011
Write the null hypothesis and the alternative hypothesis?
For the following statement, write the null hypothesis and the alternative hypothesis. Then, label the one that is the claim being made.
A bus drivers' union claims that the mean age of a bus driver in Chicago is 55.3 years|||Null: The mean age of a bus driver in Chicago is 55.3 years old.
Alternative: The mean age of a bus driver in Chicago is NOT 55.3 years old.
A bus drivers' union claims that the mean age of a bus driver in Chicago is 55.3 years|||Null: The mean age of a bus driver in Chicago is 55.3 years old.
Alternative: The mean age of a bus driver in Chicago is NOT 55.3 years old.
I am having trouble determining what the null and alternative hypothesis would be.?
I am having trouble with this generally, but here is my specific problem:
This is hypothesis testing for two populations. A company wants to determine weather a job enrichment program would improve quality and production at the company. It then gives some numbers of the "old" and the "job-enriched" (n1, n2, xbar1, xbar2, and s1, s2), which I can figure all of that out. I just need to know how to determine what the null and alternate hypothesis is. Thanks in advance.|||H0 is always an equality. In this case, it's xbar1=xbar2.
H1 can be 2-tailed, i.e. xbar1 not equal xbar2 or it can be 1-tailed, i.e. xbar1 %26gt; xbar2 (or xbar1 %26lt; xbar2). In your case, it's 1-tailed. Which on depends on what is the physical interpretation of xbar.
This is hypothesis testing for two populations. A company wants to determine weather a job enrichment program would improve quality and production at the company. It then gives some numbers of the "old" and the "job-enriched" (n1, n2, xbar1, xbar2, and s1, s2), which I can figure all of that out. I just need to know how to determine what the null and alternate hypothesis is. Thanks in advance.|||H0 is always an equality. In this case, it's xbar1=xbar2.
H1 can be 2-tailed, i.e. xbar1 not equal xbar2 or it can be 1-tailed, i.e. xbar1 %26gt; xbar2 (or xbar1 %26lt; xbar2). In your case, it's 1-tailed. Which on depends on what is the physical interpretation of xbar.
Question about the null and alternative hypothesis?
State the Null and Alternative Hypothesis for the following problem:
A small study was done to determine whether group exercise would reduce stress reactivity ( how much a person psychologically reacts to stress such as with their heart rate increasing and producing stress related hormones). Stress reactivity measured on a 10 point scale was assessed (high numbers indicate more stress). Stress pre and post interventions were completed.|||umm , i dont know .. sorry
A small study was done to determine whether group exercise would reduce stress reactivity ( how much a person psychologically reacts to stress such as with their heart rate increasing and producing stress related hormones). Stress reactivity measured on a 10 point scale was assessed (high numbers indicate more stress). Stress pre and post interventions were completed.|||umm , i dont know .. sorry
Define the parameter of interest then use it to write the null and alternative hypothesis?
Define the parameter of interest then use it to write the null and alternative hypothesis (in symbols) for each of the following research questions.
A) Many cars have a recommended tire pressure of 32 psi (pounds per sq inch) At a roadside vehicle safety checkpoint, officials plan to randomly select 50 cars for which this is the recommended tire pressure and measure the actual tire pressure in the front left tire. They want to know whether drivers on average have to lil pressure in their tires?
B) It states that the net contents weigh 12 ounces. It is suspicious of this claim because the package never seems full to her. She plans to measure the weight of the contents of the next 20 boxes she buys and find out whether she is being short changed.|||(A) Ho: 渭 = 32 psi; H1: 渭 %26lt; 32 psi
(B) Ho: 渭 = 12 ounces; H1: 渭 %26lt; 12 ounces
A) Many cars have a recommended tire pressure of 32 psi (pounds per sq inch) At a roadside vehicle safety checkpoint, officials plan to randomly select 50 cars for which this is the recommended tire pressure and measure the actual tire pressure in the front left tire. They want to know whether drivers on average have to lil pressure in their tires?
B) It states that the net contents weigh 12 ounces. It is suspicious of this claim because the package never seems full to her. She plans to measure the weight of the contents of the next 20 boxes she buys and find out whether she is being short changed.|||(A) Ho: 渭 = 32 psi; H1: 渭 %26lt; 32 psi
(B) Ho: 渭 = 12 ounces; H1: 渭 %26lt; 12 ounces
HELP PLEASE. For the following write the null and the alternative hypothesis then label the one that is the c?
for the following write the null and the alternative hypothesis then label the one that is the claim being made. The average age of graduating seniors is at least 18 years old.|||Ha=null hypothesis
Ho= alternative hypothesis
If you are testing if the average age is 18 and this is the status Quo...
Ha=%26gt;18 (equal to or greater than)
Ho %26gt; 18
Null hypothesis just means status quo..... You are testing against it so this would be your answer|||null hypothesis: there is no true difference in the number of graduating seniors who are younger than 18 years old and those at least 18 years old
alternative: average age at least 18
Ho= alternative hypothesis
If you are testing if the average age is 18 and this is the status Quo...
Ha=%26gt;18 (equal to or greater than)
Ho %26gt; 18
Null hypothesis just means status quo..... You are testing against it so this would be your answer|||null hypothesis: there is no true difference in the number of graduating seniors who are younger than 18 years old and those at least 18 years old
alternative: average age at least 18
Express the null hypothesis and the alternative hypothesis in symbolic form.?
Express the null hypothesis and the alternative hypothesis in symbolic form. Use the correct symbol for the indicated parameter.
The owner of a football team claims that the average attendance at games is over 62,900, and he is therefore justified in moving the team to a city with a larger stadium.|||Ho: 渭 = 62900
Ha: 渭 %26gt; 62900
The owner of a football team claims that the average attendance at games is over 62,900, and he is therefore justified in moving the team to a city with a larger stadium.|||Ho: 渭 = 62900
Ha: 渭 %26gt; 62900
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