In a random survey of 1500 adults in California and 1000 adults in Oregon, you found that 228 smokers were from California and 185 smokers were from Oregon. Compute the pooled proportion, writing as a 4 place decimal.

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A: For country C n=1024,p hat =0.45 For country D n =1078 ,p hat = 0.41

Q: If three out of every eight trick-or-treaters that came to your house last Halloween were dressed as…

A: Simplify to get the answer.

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: The following data was taken on a sample of 121 students to see the proportions of left and right…

A: From the given information in the table, we can see that Total no. of students in the sample =121…

Q: 100 students at a college were asked whether they had completed their required English 101 course,…

A: Given information: Total number of students at a collage(n)=100. Number of students say "yes"…

Q: Of 250 adults who tried a new multi-grain cereal, "Wow!", 187 rated it excellent; of 100 children…

A: Pooled Proportion: Let us suppose in a population of size N1 the number of members possessing a…

Q: We would like to know: "What percentage of college students read the college newspaper every day?"…

A: There are two ways to draw conclusion about a population.

Q: A poll found that 78 people out of a survey of size 109 watch at least three hours of TV per day…

A: Given data, n=109 x=78 sample proportion p=?

Q: 99 students at a college were asked whether they had completed their required English 101 course,…

A: The point estimate of population proportion is sample proportion.

Q: 3. In a Gallup Pool, 52% of 1038 surveyed adults said that second hand smoke is "very harmful". What…

A: Following information is given:   Total number of people survey = 1038 Percentage of people who said…

Q: 104 concert-goers at the Glass House in Pomona, California were asked if they know how to play an…

A: Here it is given that- Number of concert goers  = 104 Number of concert goers who can play an…

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

A:

Q: When 3,011 adults were surveyed in a Pew Research Center poll, 73% said that they use the internet.…

A: Given Information: n = 3011 ¾ of all adults use the internet (p)  = 75% = 0.75   = 73% = 0.73 Step…

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A: Given Information: Country A: Sample size n1=1004 Sample proportion p^1=0.53 Country B: Sample size…

Q: In order to estimate the attendance at a 1,000,000 square foot mall, a sample of people is taken in…

A: We will solve the problem

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A:

Q: Consider a survey involving the cookie preferences of a sample of 1,214 adults. If 9% answered…

A: Consider the given information. A fraction can be converted into percentage by multiplying 100 and…

Q: When 445 junior college students were​ surveyed, 135 said that they have previously owned a…

A:

Q: d) What proportion of people leave Vegas having lost between $200 and $800 (for a given year)?

A: (d) Obtain the Z-score for the random variable X equals 200. The Z-score for the random variable X…

Q: In a survey of 1150 adult males, 805 said they use the Internet. In a survey of 1050 females, 746…

A: There are two dependent variables which are males and females. The independent variable is using of…

Q: If eight out of every fifteen trick-or-treaters that came to your house last Halloween were dressed…

A: Total number of trick and treaters is 15x. Total number of trick and treaters who were dressed as…

Q: An opaque jar contains 300 marbles, all either green or purple. Calista pulls out 10 marbles without…

A: # Given: no of marble in jar N=300  Sample of size n=10 drawn  No of purple marble in sample =2…

Q: When 410 college students were surveyed,150 said they own their car. Find a point estimate for p…

A: Given Data: The number of college student was surveyed is: n=410 The number of a student owning…

Q: 80 students at a college were asked whether they had completed their required English 101 course,…

A: Given: In a college 80 students completed their English 101 course with 48 students being yes. To…

Q: The Arizona Department of Transportation wishes to survey state residents to determine what…

A: Solution-: Given: M.E.=0.03,α=0.01, We take, p^=0.5 and  q^=0.5  We find how many residents do they…

Q: 130 students at a college were asked whether they had completed their required English 101 course,…

A:

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

A:

Q: In research about the population of a county with 100,000 inhabitants, a sample of 3000 households…

A: According to the provided data, a total of 3000 households were contacted to participate in the…

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A: For the first first ,  Claim is the population of adults in country C who favor building new nuclear…

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

A:

Q: In a survey of 3121 people, 412 are under-vaccinated. What is the proportion of under-vaccinated…

A: Given data, Total no of people n=3121 No of people under vaccinated is x=412 What is the proportion…

Q: The Arizona Department of Transportation wishes to survey state residents to determine what…

A: Suppose p̂ is the sample proportion of the population, who would like to increase state-wide…

Q: The percentage of buyers who paid between $14,000 and $22,000 is %.

A: Let , X→N(μ=18000 , σ=2000) By  using 68-95-99.7 rule ,  We want to find the P(14000<X<22000)…

Q: In the upcoming election for governor, the most recent poll, based on 900 respondents, predicts that…

A: From the given information, In the upcoming election for governor, the most recent poll, based on…

Q: Estimate the following percentages without using a calculator. 10.1% of 7,800 is  0.99% of 83,583…

A: Percentage= (value ×percent)/100

Q: Why must the sum of all fs in a sample equal N?

A: Every datum in a sample is assigned to a category/class depending on its value. For a given dataset,…

Q: How many performers earned exactly 1 star?

A: Given: Total number of performers, N = 140 Percentage of performers got 1 star = 15%

Q: A Pew poll taken in 2010 surveyed 830 people aged 18-29 and found that 166 of them had one or more…

A: State the hypotheses.

Q: The Arizona Department of Transportation wishes to survey state residents to determine what…

A: Given,margin of error(E)=0.04Let us assume sample…

Q: If a coin is flipped 225 times and the number of Hs is 75. Compute the proportion of Hs. Round to…

A:

Q: For a survey based on 1,900 adults, what is the conservative margin of error as a proportion? (Round…

A: MOE

Q: a) What proportion of the sampled wafers had (P 2 8)? b) What proportion of the sampled wafers had…

A: 5. a) The frequency is, Number of Particles Cumulative frequency Frequency Number of Particles…

Q: In research about the population of a county with 100,000 inhabitants, a sample of 3000 households…

A: The number of households not willing to participate in the survey is 1200.

Q: Find the probability of selecting either a non-smoker or a woman when you select a person at random…

A:

Q: In a Harris poll of 2302 adults, 14% said they have a tattoo. Approximately how many adults have a…

A: Given information- We have given that in a Harris poll of 2302 adults, 14% have a tattoo. We have to…

Q: 85 students at a college were asked whether they had completed their required English 101 course,…

A: Best point estimate:The best point estimate of population proportion is the sample proportion.

Q: In a survey of 1150 adult males, 805 said they use the Internet. In a survey of 1050females, 746…

A: From the provided information,

Q: On a quick survey, respondents had to pick their favorite dessert from ice cream, cake, chocolate,…

A: Fraction of respondents pick ice-cream=25Fraction of respondents pick chocolate=13Fraction of…

Q: To determine the proportion of voters who favor a certain candidate for governor, the campaign staff…

A:

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.