A company wants to determine the frequency of the occurrence of invoice error. Suppose that in a sample of 200 sales invoices, 10 contain errors. construct a 95% CI for the proportion error

Q: In order to have a margin of error of 2%, people should be surveyed.

A: we are given that 24% people consider summer as their favourite season (p) = 0.24 to find  number of…

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

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Q: island has 12 fur seal rookies(breeding places). To estimate the fur seal pup population in Rookery…

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Q: An entertainment company surveyed 360 elementary school children and found that 153 of them were…

A: There are 153 out of 360 (n) elementary school children found as above grade level readers. The…

Q: Students at Neilson Middle School are asked if they prefer watching television or listening to the…

A: Given that, The total number of students at Neilson Middle School is 150. The number of students,…

Q: 37. Whatis the proportion of single women among those who are 30-44 years old? 38. Of the to tal…

A: The following information can be obtained from the table: Number of single women who are 30-44 years…

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: If the distribution is approximately mound-shaped, what is the proportion less than 80.12 ? 15

A: Find the value of z using mean and standard deviation.

Q: Americans who believe the government should ensure basic health care is _________% with a margin of…

A:

Q: Here are the fuel efficiencies (in mpg) of 8 new cars. 45, 20, 45, 14, 34, 22, 18, 28 What is the…

A: Given information- We have given the data of the fuel efficiencies of 8 new cars (arranged in…

Q: A researcher wished to estimate the difference between the proportion of users of two shampoos who…

A: Based on the provided information, the known values are: p1=78400=0.195p2=92500=0.184n1=400n2=500 In…

Q: The more efficient the estimate, the more the sampling distribution

A: Basic: Point estimate is a single number calculated  from a set of data, that is the best guess of…

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

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Q: What percentage of the sample were female drivers?

A: It is given that Total = 5+7+11+9 = 32 Number of females = 7+9 = 16

Q: What is the estimate of the common population proportion?

A: To find: The estimate of common population proportion

Q: what proportion of people in relationships are dissatisfied?

A: Let , X→N(μ=60 , σ=8) Since , an individuals with a score 50 or less is considered dissatisfied. Our…

Q: Suppose you randomly select a card from a deck of cards. What are the odds against drawing an ace?…

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Q: If a researcher measures two individuals on a ratio scale, then it is impossible to determine how…

A: Ratio scale is a form of quantitative variable measurement scale. Ratio scale makes it possible for…

Q: In order to estimate the population proportion with a high school education,  you need a minimum…

A:

Q: In a recent study, 46% of people enjoy country music.  If 200 people are surveyed about their…

A: Given : Proportion (prop.) of people enjoy country music p = 46% = 0.46 Sample size of people n =…

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: Take a random sample of 50 pages from a book and estimate the proportion of all pages that contain…

A: Here we want to find proportion of pages that contain figures.

Q: If a coin is flipped 150 times and the number of Hs is 25. Compute the proportion of Hs. Round to…

A: We have given that,  Favorable cases (X) = 25 and sample size (n) = 150 Then,  We will find the…

Q: Suppose that in a group of 800 women, the percentage who work is the same as in the sample here, how…

A: men women total work 15 23 80 not work 23 28 51 total 38 93 131

Q: Is it more likely to hit the area in white or blue and by how much?

A: The area of the square is= 18×18=324  square inch The radius of the circle is= 2+3+3=8 inches So the…

Q: re in favor of a new Green initiative ere in favor of the initiative. Round a fidence the proportion…

A: a) Given, sample size (n) = 556 x = 354 sample proportion (p^) = x/n = 354/556 = 0.6367 significance…

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: A survey of Hoosiers found that 57% are Pacers fans, 44% are Colts fans, and 35% are Pacers fans but…

A: Let P= Pacer fans  C= Colt fans So, P(P)= 57% = 0.57  P(C)=44%=0.44 So, 57% - 35%=22%= 0.22 are…

Q: Suppose 50% of all voters in a population support a politican, SHARE What is the zscore of sample…

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Q: Each day, a weather forecaster predicts whether or not it will rain. For 80% of rainy days, she…

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Q: For the survey method to be valid, a representative sample of peoplemust be polled. T or F?

A: The survey methodology essentially involves the study of individuals (or a specified group of finite…

Q: An environmentalist wants to find out the fraction of oil tankers that have spills each month. Part…

A: Solution: a. Let X be the number of oil tankers that had spills and n be the number of tankers. From…

Q: a pollster plans to improve survey results by only conducting polls in which the margin of error is…

A:

Q: Suppose a​ 10-in. circular pizza costs​ $4.00. To find the​ price, x, of a​ 14-in. circular​ pizza,…

A:

Q: What proportion of students either own an automobile or lives in a dor

A: From the given information, P(own an automobile)=0.60 P(lives in a dormitory)=0.20 P(own an…

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: The sample proportion Is defined as Multiple Choice x/n n!

A:

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: State the generic error for an interpolating formula?

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

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Q: Find out if illiteracy and criminality are associated or independent by using the Proportion Method.

A: The given data can be described as   Criminal  Not criminal Total Literates 8 (AB) 707 (Aβ) 715…

Q: An island has 12 fur seal rookeries​ (breeding places). To estimate the fur seal pup population in…

A: From the above details we have,

Q: The registrar’s office at ACC predicts that 90% of the 6,950 spaces open in various math classes…

A:

Q: Assuming a group has one uniform rate, 40% of the group receives a 10% rate increase and 60% of the…

A: We will consider that the group has total 100 members and each member of the group has a uniform…

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: Which statement correctly identifies the similarity criteria that can be used to prove the triangles…

A: SSS Similarity Theorem :  If all three pairs of corresponding sides of two triangle are…

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

A: GIVEN: 5 out of every 8 trick or treaters that came to your house were dressed as cowboys.

Q: time a 10-year-old American child spends playing outdoors per day is between 19.28 and 24.08…

A: Given Data Lower limit = 19.28 upper limit = 24.08

Q: Suppose you want to investigate the proportion of households in Muscat governorate that have fire…

A: Given information: The investigator is specially interested to estimate the proportion of households…

Q: Find the percentage of scores of the following

A: Given,μ=0s=1