In order to estimate the population proportion with a high school education,  you need a minimum sample size to result in a margin of error of 7%.  For a 95% CI, what is that sample size?

Q: A group of 100 people, who lived at varying distances (in kilometers) from an island nuclear power…

A: Given that there are 100 people. Therefore, the table becomes,    0-3 km distance 3-6 km distance…

Q: If you want a poll to have a margin of error of 2.84%, how large will your sample have to be?

A:

Q: When solving problems where you need the sampling distribution of r, what is the reason for…

A: The basic reason for transforming r to z which makes the “r” normally distributed with a known…

Q: Given the population size with a corresponding margin of error, determine the sample size of each of…

A: Given that,  N = 1500,  e = 5%     =0.05 The formula for calculating the sample size is,

Q: If we are dealing with data obtained about the sample means, then we will use the formula z =…

A: Solution

Q: A researcher wants to calculate the prevalence of Alzheimer's among members of a specific community…

A: Introduction: The 100 (1 – α) % confidence interval for the population proportion, p is: Here, n is…

Q: A sample selected from a population gave a sample proportion equal to 0.60.

A:

Q: The province of Pangasinan has a population of 3,163,190. Calculate the sample size using Yamane's…

A:

Q: How large the sample size should be in order to be 98 percent confident, if the sample proportion is…

A: Given data, p=0.78 E=0.16 z-value at 98% confidence is Zc=2.326 n=?

Q: eek 10 Question 7 What are the benefits of stratified sampling? Contrast stratified sampling with…

A: Stratified random sampling(STRS)   and Quota Sampling.

Q: The owner of a local bar specializing in alternative music wanted to determine the average age of…

A: t 95% confidence level, the z value is 1.96 which can be obtained by using the standard normal…

Q: a sample of size 32 and mean = 40, then the degree of freedom is Answer:

A: It is given that, sample size, n=32 Mean =40

Q: Holding everything else constant, what would happen if the sample size had been greater?

A: Goofy Marketing Solutions conducted a survey among 16 randomly selected visitors to the newly opened…

Q: Given the population size with a corresponding margin of error, determine the sample size of each of…

A: Solution: Given information: N= 2500 Population size  e = 5%= 0.05  margin of error.

Q: A company wants to know the proportion of consumers willing to buy their product. How many people…

A: Given that ME=margin of error=1.5%=0.015z=critical value off 90% confidence…

Q: I dont have an example forthe problem question 22, so I am having trouble. Please help.

A: Introduction:Suppose a random variable X has mean μ and standard deviation σ.Let X = x be the cutoff…

Q: Say that there are five populations, and we need to test for difference of population means.  If we…

A: Say that there are five populations, and we need to test for difference of population means. We test…

Q: A researcher wishes to estimate the proportion of corporate executives whose annual salary is over…

A:

Q: Researchers conducted a survey among 400 doctors to ask the question; "Are you willing to treat your…

A: Given Sample size, n = 400  For a conservative case, we assume that the proportion of  patients…

Q: For a sample of size 25, degrees of freedom is equal to _____.

A: From the given information,   Sample size = 25   The objective is to find the degrees of freedom.

Q: If you have been told that the 90% CI for the population mean is ( 20.082, 173.478) what is the…

A: The formula of the margin of error is, Where, UCL denotes the upper control limit   LCL denotes the…

Q: When estimating the proportion of Ole Miss students that support moving the Confederate statue, how…

A:

Q: You are told that the proportion p of those who answered "yes" to a poll about internet use is 'p =…

A:

Q: One design problem in the development of measurement instruments concerns the sequence of questions.…

A: The sequence with which each question appears in a survey is known as question sequencing. This…

Q: a nutritionist wishes to determine, within 3% the true proportion of adults who do not eat lunch. if…

A:

Q: Can you think of an area where it might not be practical, for a variety of reasons, to sample 100%…

A: Yes, there are several areas where we cannot sample 100% of the population being covered to test.

Q: Does it make sense ? Why or why not? A pollster plans to improve survey results by only conducting…

A: A pollster plans to improve survey results by conducting polls in which the margin of error is zero.

Q: A sample of size 26 was gathered from high school seniors to estimate how many intended to attend…

A: Given that  Sample size (n) = 26 The proportion answering Yes (P) = 0.9 P = 0.9 ; Q=1-P = 1-0.9 =0.1…

Q: A researcher wishes to estimate the proportion of adult males who are less than 5 feet 5 inches…

A: It is given that margin of error (E) is 0.04 and the confidence level is 0.90.

Q: The US population is 13% African American.  If you were to take a SRS of 500 Americans, above what…

A: Solution:From the given information, the proportion of African American is 0.13, random sample of…

Q: A group of students need to submit a project and they need to survey people about their daily…

A: see the handwritten solution

Q: In what range would you expect to find the middle 98% of most head breadths? Between and If you were…

A: Let x1 and x2 be the head breadths. The middle 98% of most head breadths lies between is,…

Q: An educator desires to estimate, within 4%, the true percentage of high school students who study at…

A:

Q: For the Dakota problem: a. Solve Dakota's LP and run a sensitivity analysis. b. If 18 finishing…

A:

Q: 1. Use the results of the simulation to approximate the margin of error for Javier's estimate of the…

A: Here we have to calculate margin of error Assuming the confidence Interval = 95% Sample Size  = 500…

Q: Use the data and the correct formula to find the margin of error for estimating a population…

A: Given: n = 100 x = 45 sample proportion = x / n = 45/100 =0.45 95% level of confidence  Level of…

Q: Make your own problem about single sample estimating mean. Include all of your solution.

A: Taking data Sr. No. Data (x) 1 2 2 5 3 6 4 4 5 8

Q: when you have means from two different samples, it is best to conduct a what test?

A: When there is mean from two different samples, two types of test can be conduced:

Q: If the proportion of Heads is .25 out of 200 flips, what is the p-value? Round to three places.

A: Given : The proportion of Heads is .25 out of 200 flips.

Q: How large a sample is needed

A: Given :  Margin of error=E=3%=0.03 Significance level=α=0.01 The critical value is ,…

Q: If we want to estimate the population proportion with a margin of error of 0.10 for a level of…

A: Given data,E=0.10z value at 90% confidence is Zc=1.645let proportion p=0.5n=?

Q: The US population is 13% African American.  If you were to take a SRS of 500 Americans, below what…

A: From the given data The US population is 13% African American

Q: Sleep Aids. The additional sleep, to the nearest tenth of an hour, obtained by a sample of 100…

A: Quantitative variable: A variable that provides numerical values of individual and Arithmetic…

Q: Solve the following problem step by step please A newspaper does a survey of reading preferences…

A: 330=150(survey)+120(read electronic)+50(Physical)+10(do not read any format)

Q: With no preliminary estimate of the proportion known, how many young adults would you survey to…

A: It is given that margin of error (E) is 0.10 and the confidence level is 0.99.

Q: If the proportion of Hs is .45 out of 50 flips, what is the p-value? Round to three places.

A: We have given that Sample proportion =0.45 Sample size (n)=50 flips  Population proportion p=0.5…

Q: As a Physical Education teacher of Hermosa National High School Senior High School, Ma’am Mary Ann…

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

Q: In what range would you expect to find the middle 50% of most head breadths? and Between If you were…

A:

Q: If the proportion of Hs is .25 out of 200 flips, what is the p-value? Round

A: Here proportion of head in fair coin should be 0.5 So take hypothesis with proportion p is 0.5 or…

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.