Description
Probability Reasoning statistic homework I attached the file below. If anyone is willing to work on it for me that would me very helpful.
Unformatted Attachment Preview
Purchase answer to see full attachment
Explanation & Answer
Attached.
7. Interpretation of confidence interval:
We are 95% confident that the true population parameter ‘percentage of seniors minus percentage of
freshman getting their first choice of courses’ is between 29.5% and 38.5%.
8.
From given data,
𝑝̂ = 0.25
𝑀𝑎𝑟𝑔𝑖𝑛 𝑜𝑓 𝐸𝑟𝑟𝑜𝑟(𝐸) = 0.03
For 95% confidence interval, 𝛼 = 0.05
For 𝛼 = 0.05, 𝑧𝛼 = 1.96
2
𝑧𝛼
Sample size (𝑛) = 𝑝̂ (1 − 𝑝̂ ) (
2
1.96 2
) = 800.33
) = 0.25 ∗ 0.75 ∗ (
𝐸
0.03
2
Round up 𝑛 to nearest integer, 𝑛 = 801
So, 801 students need to be surveyed from 95% confidence interval to be in 3% points.
9/10/11.
If proportion of woman and man abstaining from drinking alcohol are respectively 𝑝1 and 𝑝2 :
Null Hypothesis 𝑯𝟎 : 𝑝1 ≤ 𝑝2
Alternative Hypothesis 𝑯𝒂: 𝑝1 > 𝑝2
What test did you run: z-test
To calculate p-value:
𝑝
̂1 =
264
= 0.2316
1140
𝑝
̂2 =
214
= 0.1783
1200
We will use 𝑝1 − 𝑝2 = 0 (𝑎𝑠 𝑝𝑒𝑟 𝑎𝑠𝑠𝑚𝑒𝑑 𝑖𝑛 𝑛𝑢𝑙𝑙 ℎ𝑦𝑝𝑜𝑡ℎ𝑒𝑠𝑖...
Review
Review
24/7 Homework Help
Stuck on a homework question? Our verified tutors can answer all questions, from basic math to advanced rocket science!
Similar Content
Related Tags
Orphan Train
by Christina Baker Kline
The Old Man and the Sea
by Ernest Hemmingway
Nervous Conditions
by Tsitsi Dangarembga
The Subtle Art of Not Giving a F*ck
by Mark Manson
The Odyssey
by Homer
Cant Hurt Me - Master Your Mind and Defy the Odds
by David Goggins
The Hunger Games
by Suzanne Collins
Mockingjay
by Suzanne Collins
The Lost Man
by Jane Harper