When compare two proportions, if we use x1 to represent the number of successes in the sample 1, x2 for the number of sucesses in the sample 2, n1 for the sample size 1, n2 for the sample size 2, îi for the sample proportion 1 and P2 for the sample proportion 2, what is the correct formula to calculate the pooled sample proportion using these notations? a) X1+x2 b) *1 n1 c) *2 d) *1+*z n1 e) X1+X2 n2

When compare two proportions, if we use x1 to represent the number of successes in the sample 1, x2 for the number of sucesses in the sample 2, n1 for the sample size 1, n2 for the sample size 2, îi for the sample proportion 1 and P2 for the sample proportion 2, what is the correct formula to calculate the pooled sample proportion using these notations? a) X1+x2 b) 1 n1 c) 2 d) 1+z n1 e) X1+X2 n2

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Q: #of Occupants 1 2 3 0.70 0.15 0.10 0.03 0.02 What is the mean number of occupants in a vehicle? 45…

A: given data, here data table and their probabilities are given we have to find out the mean for the…

Q: a) What is the sample size, found at the bottom of the table? 2072 b) What is the point estimate for…

A: Here it is given that, Sample size n= 2072 And point estimate, p^= 51.3% = 0.513

Q: The data set below shows the number of items purchased by 10 shoppers at Selfridges (London) in a…

A: Given data set is13,27,95,38,21,50,64,24,52,27arrange the data in ascending order…

Q: I have a width of at m

Q: The brand manager for a brand of toothpaste must plan a campaign designed to increase brand…

Q: The angronomist realized that he wanted his results to apply over a range of soil conditions. So, he…

A: Since you have posted a question with multiple subparts, we will solve first three subparts for you.…

Q: A researcher wants to be 95% confident in the proportion of people with an aquarium at home. A…

Q: Suppose that a researcher is studying the wingspans of wild condors. To study this the researcher…

A: The following solution is provided below

Q: In a sample of 508 men who worked at home, 32% of them were college graduates. a.) Among the 508 men…

Q: A researcher wishes to estimate the number of households with two computers. How large a sample is…

A: Givenconfidence level = 90%Margin of error(E)=2%=0.02p^=0.45

Q: Homer Simpson is interested in studying the ratio of the various colors of sprinkles on Lard Lad…

A: Introduction: Here, it is not mentioned whether the three donuts of each variety are chosen randomly…

Q: find the relative risk for hypertension in females 50+ years versus females <50 years of age. (keep…

A: Now complete table from given information Developed Hypertension not develop Hypertension…

Q: A sample of two hundred and fifty families showed that ninety one owned at least one car. Find an…

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: When we don't have any prior information about population proportion, we generally take it as 0.50.…

Q: A poll taken this year asked 1015 adults whether they were fans of a particular sport and 62% said…

A: sample size (n)=1015 Proportion of this year (p) =0.62 Confidence level = 0.95α = 1- confidence…

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: Sol:- Given Margin of Error = E = 0.02 For 99% Confidence Interval zα/2=2.576

Q: Residents in a city are charged for water usage every three months. The water bill is computed from…

A: INTRODUCTION : HISTOGRAM: The Histogram is often useful to represent a frequency distribution…

Q: The statistics students at the college were asked where they were born and whether they were male or…

Q: The mathematics SAT scores of the seven students in a mathematics seminar are 533, 553, 578, 586,…

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

Q: From a sample of 141 items, 21 are defective. The point estimate of the population proportion…

Q: 1) A teacher gives and exam with a mean of 82 and an SD of 8. a) what proportion did scored an A? b)…

A: Question 1)The mean of the distribution is .The standard deviation of the distribution is The score…

Q: Suppose you are a lawyer representing a Hispanic individual in a criminal trial. Twelve jurors are…

A: Note: Since you have posted a question with multiple sub-parts, we will solve first three subparts…

Q: Use the results from a survey of a simple random sample of 1125 adults. Among the 1125 respondents,…

A: Here, the given information is:-a survey of a simple random sample of 1125 adults. Among the 1125…

Q: (c) Provide the sample proportion, p hat, used to estimate the population proportion p of all adults…

A: The best point estimate of the population proportion is the sample proportion. It was found that out…

Q: 1) The data below come from a study that investigated the usefulness of MRI to diagnose breast…

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: A Christmas tree survey was conducted to determine there was a difference between urban rural tree…

A: The 90% Confidence interval for the two proportions p1 and p2 can be calculated as:

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: Given data,E=3%=0.03Z-value at 90% confidence is Zc=1.645

Concept explainers

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

Question

When compare two proportions, if we use x1 to represent the number of successes
in the sample 1, x2 for the number of sucesses in the sample 2, n1 for the sample
size 1, n2 for the sample size 2, îi for the sample proportion 1 and P2 for the sample
proportion 2, what is the correct formula to calculate the pooled sample proportion
using these notations?
a) X1+x2
b) X1
n1
c) *2
n2
d) *1+x2
n1
e) *1+x2
n2

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

$Point Estimation, Limit Theorems, Approximations, and Bounds$

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.

Similar questions

A researcher wishes to estimate the proportion of households with two cars.a) How large a sample is needed in order to be 99% confident that the sample proportion will not differ from the true proportion by more than 3%?b) Repear part a if a previous study indicates that the proportion of households with two cars is 25%.
A bowler’s score for six games were 166, 170, 116, 310, 288, 210 Using this data, calculate the following a) Range b) Z score for each number
From the given scenario, define the population proportion. In 2019, a national survey organization asked the question "Do you go on more than two vacations per year?" to a random sample of 2,000 Americans. 580 responded "Yes", while the other 1,420 people responded "No". Group of answer choices: A) the proportions of the sampled Americans who go on more than two vacations per year B) the proportion of all Americans who go on more than two vacations per year C) the 1,420 people who responded "No" D) the 2,000 Americans
Logan and Brian began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Logan took a test in Art History and earned a 76.8, and Brian took a test in English and earned a 68.9. Use the fact that all the students' test grades in the Art History class had a mean of 71.9 and a standard deviation of 11.6, and all the students' test grades in English had a mean of 61 and a standard deviation of 9.4 to answer the following questions.a) Calculate the z-score for Logan's test grade.z=z= [Round your answer to two decimal places.] b) Calculate the z-score for Brian's test grade.z=z= [Round your answer to two decimal places.]c) Which person did relatively better? Logan Brian They did equally well.
7) Estimate the proportion of all households that are very satisfied from the house they are living (question 16 of the survey).
60% of students entering four-year colleges receive a degree within six years. Is this percent smaller than for students who play intramural sports? 128 of the 220 students who played intramural sports received a degree within six years. What type of test should you use? A) z-test for population mean B) z-test for population proportion C) t-test for population mean
a programmer plans to develop a new software system. In planning for the operating system that he will use, he needs to estimate the percentage of computers that use a new operating system. How many computers must be surveyed in order to be 99% confident that his estimate is in error by no more than three percentage points? Complete parts (a) through (c) below. a) Assume that nothing is known about the percentage of computers with new operating systems. n = b) Assume that a recent survey suggests that about 98% of computers use a new operating system.n = c) Does the additional survey information from part (b) have much of an effect on the sample size that is required?
A programmer plans to develop a new software system. In planning for the operating system that he will use, he needs to estimate the percentage of computers that use a new operating system. How many computers must be surveyed in order to be 99% confident that his estimate is in error by no more than four percentage points? Complete parts (a) through (c) below. a) Assume that nothing is known about the percentage of computers with new operating systems. n= (Round up to the nearest integer.)
A choral conductor has 1885 singers in her choir, some of them are professional singers. The conductor wants to estimate what percentage of singers are professional, but can't ask all 1885, so she instead asks 630 singers in front and finds 17 who are professionals. (a) Identify the sample.A. 17/1885B. 630C. singers who were askedD. None of the above. (b) Identify the populationA. percentage of entire singers who are professionalB. entire singersC. 17/1885D. None of the above. (c) What specific type of bias does this scenario demonstrate?A. Voluntary response samplingB. Convenience SamplingC. It is representative of the population.D. None of the above. (d) Identify the parameterA. range of values in which 95% values fallB. percentage of entire singers who are professionalC. 17D. None of the above.
From the given scenario, define the population proportion. In 2019, a national survey organization asked the question "Do you go on more than two vacations per year?" to a random sample of 2,000 Americans. 580 responded "Yes", while the other 1,420 people responded "No". Group of answer choices: A) the proportions of the sampled Americans who go on more than two vacations per year B) the proportion of all Americans who go on more than two vacations per year C) the 1,420 people who responded "No" D) the 2,000 Americans
Given the population of three children ages: 3, 4, and 5 a) Write the distribution of all samples means of size 2 b) Show that the mean of all sample means is equal to the population mean.
A programmer plans to develop a new software system. In planning for the operating system that he will use, he needs to estimate the percentage of computers that use a new operating system. How many computers must be surveyed in order to be 99% confident that his estimate is in error by no more than two percentage points question mark Complete parts (a) a) Assume that nothing is known about the percentage of computers with new operating systems.