Questions
FA25_QTM_100_3 Final Exam- Requires Respondus LockDown Browser
Single choice
A hypothesis test about the true proportion was performed using the following hypotheses, which yielded a p-value < 0.05 (suppose all conditions for inference are satisfied): 𝐻 0 : 𝑝 = 0.7 , 𝐻 𝑎 : 𝑝 < 0.7 Which of the following scenarios would yield a similar p-value (i.e., p-value < 0.05) as the initial hypothesis test above?
Options
A.𝐻
0
:
𝑝
=
0.7
,
𝐻
𝑎
:
𝑝
<
0.7
,
𝑧
=
2.08
B.𝐻
0
:
𝑝
=
0.5
,
𝐻
𝑎
:
𝑝
>
0.5
,
𝑧
=
−
2.04
C.𝐻
0
:
𝑝
=
0.5
,
𝐻
𝑎
:
𝑝
≠
0.5
,
𝑧
=
−
2.01
D.𝐻
0
:
𝑝
=
0.6
,
𝐻
𝑎
:
𝑝
>
0.6
,
𝑧
=
2.03
View Explanation
Verified Answer
Please login to view
Step-by-Step Analysis
The question presents a hypothesis test about a true proportion with H0: p = 0.7 and Ha: p < 0.7, and it states that the p-value was less than 0.05. We’re asked to identify which of the given scenarios would yield a similar p-value (i.e., p-value < 0.05).
Option 1: H0: p = 0.7, Ha: p < 0.7, z = 2.08
- For a left-tailed test (Ha: p < 0.7), the p-value is the probability of observing a z statistic as extreme or more in the left tail, i.e., p = P(Z ≤ z_obs).
- Here z_ob......Login to view full explanationLog in for full answers
We've collected over 50,000 authentic exam questions and detailed explanations from around the globe. Log in now and get instant access to the answers!
Similar Questions
At the beginning of the semester, a professor hypothesizes that half of the class would think the pace of the class was ‘just right’. After collecting anonymous survey data from a random sample of the class, it was observed that 57% of the class though the pace was ‘just right’. What is the appropriate null hypothesis to determine if the true proportion of students who thought the pace was ‘just right’ differs from the hypothesized value?
A researcher collects data on the diabetes rate of 100 subjects in 2021. The researcher uses a __________ to determine if the true proportion of adults with diabetes in the United States in 2021 is different from the 2009 reported figure of 9%.
For developing countries in Africa and the Americas, let p1 and p2 be the respective proportions of babies with a low birth weight (below 2500 grams). Suppose we will test H0: p1 = p2 against H1: p1 > p2. If respective random samples of sizes n1 = 900 and n2 = 700 yield y1 = 135 and y2 = 77 babies with a low birth weight, what is the p-value associated with this hypothesis test. (Give your answer to four decimal places.)
Researchers are studying whether a high-protein diet reduces mortality in lab mice exposed to a toxin. Among 900 mice on a standard diet, 36 died. Among 950 mice on a high-protein diet, 15 died. Definitions: p1 = proportion of mice that died on the standard diet p2 = proportion of mice that died on the high-protein diet Hypotheses: H0: p1 = p2 (The diet does not affect mortality; both groups have the same mortality rate) H1: p1 > p2 (The diet reduces mortality; mice on the standard diet have a higher mortality rate) What is your decision, and what does it mean in the context of the study?
More Practical Tools for Students Powered by AI Study Helper
Making Your Study Simpler
Join us and instantly unlock extensive past papers & exclusive solutions to get a head start on your studies!