Question
I don't need the explain, just give me the answer. Thank youu sooo muchhhh. Question 7: H0:p=0.67 H1:p>0.67 Your sample consists of 127 subjects, with
I don't need the explain, just give me the answer. Thank youu sooo muchhhh.
Question 7:
H0:p=0.67 H1:p>0.67 Your sample consists of 127 subjects, with 89 successes. Calculate the test statistic, rounded to 2 decimal places
z=_______
Question 8:
You are conducting a study to see if the accuracy rate for fingerprint identification is significantly less than 68%. With HA: p< 68% you obtain a test statistic of z=2.979. Find the p-value accurate to 4 decimal places. p-value =____
Question 11:
You are conducting a study to see if the probability of catching the flu this year is significantly different from 0.33. Thus you are performing a two-tailed test. Your sample data produce the test statistic z=2.421. Find the p-value accurate to 4 decimal places. p-value =_____
Question 13:
Suppose are running a study/poll about the probability of catching the flu this year. You randomly sample 125 people and find that 83 of them match the condition you are testing. Suppose you are have the following null and alternative hypotheses for a test you are running: H0:p=0.65 Ha:p0.65 Calculate the test statistic, rounded to 3 decimal places
z=______
Question 14:
In a recent Super Bowl, a TV network predicted that 57 % of the audience would express an interest in seeing one of its forthcoming television shows. The network ran commercials for these shows during the Super Bowl. The day after the Super Bowl, and Advertising Group sampled 57 people who saw the commercials and found that 35 of them said they would watch one of the television shows. Suppose you are have the following null and alternative hypotheses for a test you are running: H0:p=0.57 Ha:p<0.57 Calculate the test statistic, rounded to 3 decimal places
z=______
Question 15:
A well-known brokerage firm executive claimed that at least 52 % of investors are currently confident of meeting their investment goals. An XYZ Investor Optimism Survey, conducted over a two week period, found that out of 80 randomly selected people, 38 of them said they are confident of meeting their goals. Suppose you are have the following null and alternative hypotheses for a test you are running: H0:p=0.52 Ha:p0.52 Calculate the test statistic, rounded to 3 decimal places
z=________
Question 16:
According to a University Center for Logistics Management, 12% of all merchandise sold in the United States gets returned. A Seattle department store sampled 89 items sold in January and found that 9 of the items were returned. If you have the following null and alternative hypotheses for a test you are running: H0:p=0.12 HA:p0.12 Calculate the test statistic, rounded to 3 decimal places
z=________
Question 10: You wish to test the following claim (HaHa) at your college using a significance level of =0.01=0.01. Ho:p=0.8 80% of college students drive to campus Ha:p>0.8 greater than 80% of all college students drive to campus You obtain a random sample of size n=368 in which there are 304 students who drive to campus. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = _______ What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = _______ The p-value is...
- less than (or equal to)
- greater than
This test statistic leads to a decision to...
- reject the null
- accept the null
- fail to reject the null
As such, the final conclusion is that...
- There is sufficient evidence to support 80% of college students drive to campus .
- There is not sufficient evidence to support 80% of college students drive to campus
- There is sufficient evidence to support the claim that greater than 80% of all college students drive to campus.
- There is not sufficient sample evidence to support the claim that greater than 80% of all college students drive to campus.
Question 12:
Test the claim that the proportion of young adults who still live with their parents is larger than 50% at the 0.10 significance level. (Source). The null and alternative hypothesis would be:
H0:p=0.5 HA:p>0.5
H0:=0.5 HA:<0.5
H0:p=0.5 HA:p<0.5
H0:=0.5 HA:>0.5
H0:=0.5 HA:0.5
H0:p=0.5 HA:p0.5 The test is:
- left-tailed
- two-tailed
- right-tailed
Based on a sample of 100 people, 52% live with their parents. The p-value is:_______ (to 2 decimals) Based on this we:
- Reject the null hypothesis
- Fail to reject the null hypothesis
Practice writing a conclusion sentence: __________
Question 17:
A local college reported that 60% of graduating students had planned on seeking careers in health services. The college conducted a survey of 400 randomly selected incoming students, 68% of them said they wish to earn a degree that would help them find careers in health services. Test the claim that the proportion of incoming students who plan on pursuing careers in health services is more than 60% at the 0.05 significance level. Step 1)The null and alternative hypothesis would be:
- H0:p=0.6 HA:p<0.6
- H0:p=0.6 HA:p>0.6
- H0:p=0.6 HA:p0.6
- H0:=0.6 HA:<0.6
Step 2)The procedure is:
one mean t-interval one-porportion z-interval one proportion z-tezt
Step 3)Summarize the sample with the appropriate calculations The test statistic is:__________ (to 3 decimals) The p-value is:___________ (to 4 decimals) Step 4)Conclusion
The p-value is ...
- unusually small
- not unusually small
Based on this we:
- Reject the null hypothesis. There is strong evidence that more than 60% of incoming students want careers in health services.
- Fail to reject the null hypothesis. There is insufficent evidence that more than 60% of incoming students want careers in health services.
- Accept the null hypothesis. There is strong evidence that more than 60% of incoming students want careers in health services.
- Reject the null hypothesis. There is insufficent evidence that more than 60% of incoming students want careers in health services.
Question 18:
A study conducted by Pew Research in May 2020 found that by the age of forty 40% of GenXers (people born 1965 - 1980) lived in a home with a spouse and at least one child (source).
In 2021 millennials (people born 1981 to 1996) began turning 40.
You are conducting a study to see if the proportion of millennials in their forties living with a spouse and child is significantly less than 0.4. You use a significance level of =0.10 You take arandom sample of 63 millennials turning forty found that 14 lived in a home with a spouse and at least one child. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = _______ What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = ________ The p-value is...
- less than (or equal to)
- greater than
This test statistic leads to a decision to...
- reject the null
- accept the null
- fail to reject the null
As such, the final conclusion is that...
- There is sufficient evidence to warrant rejection of the claim that the proportion of millennials in their forties living with a spouse and child is less than 0.4.
- There is not sufficient evidence to warrant rejection of the claim that the proportion of millennials in their forties living with a spouse and child is less than 0.4.
- The sample data support the claim that the proportion of millennials in their forties living with a spouse and child is less than 0.4.
- There is not sufficient sample evidence to support the claim that the proportion of millennials in their forties living with a spouse and child is less than 0.4.
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