8.) People were asked if their favorite dessert has chocolate in it. Out of 200 men, aid "yes," and out of 130 women, 94 said "yes." At a = 0.05, test the claim that the roportion of men is lower. a.) Use a hypothesis test b.) Use a confidence interval

Q: 12. In a sample of 600 Canadians, 265 say they would rather retire in the US than in Canada.…

A:

Q: In a spot speed study, a group of 3'd class civil engineering students has decided measure the…

A: Given,

Q: A past survey of 1,068,000 students taking a standardized test revealed that 9.9% of the students…

A: Givenn1=1068000p^1=9.9%=0.099n2=1476000p^2=9.2%=0.092Confidence interval = 95%

Q: Find a 95% confidence interval for the true population proportion during the questioning of 78…

A: According to the given question, during the questioning of 78 potential jury members 37% said they…

Q: In a study of 480 households, 168 households were found to have 4 cell phones. Find a 95% confidence…

A: Given: x=168 n=480 p^=xn=168480=0.35

Q: Out of a sample of 760 people, 367 own their homes. Construct a 95% confidence interval for the…

A: Given that, Total number of peoples = 760 367 own their homes.  95% confidence level

Q: A random sample of 12 students showed the following time (in hours) of sleep 4.5 5 5.5 6 6 7 7.5 7.5…

A: Given data  4.5,5,5.5,6,6,7,7.5,7.5,8,9,5,7 n=12

Q: Determine the confidence level for confidence interval shown in the figure belov

A: The confidence level is described as (1 - α)

Q: As part of constructing the 95%-confidence interval, we would choose which value for ta2 O 2.345…

A: We have given the statement  n= 16 Mean= 67 Standard deviation = 7.509

Q: n a survey of 2480 golfers, 372 said they were left-handed. Construct a 92% confidence interval for…

A: The given data is appropriate for single proportion confidence interval . because it is a large…

Q: Out of a sample of 500 high school students, 376 said they would prefer to have computers in every…

A: Given the data

Q: Express the confidence interval 30.7 % <p< 43.5 % in the form of p + E.

A:

Q: If n=590 and p=0.93, construct a 90% confidence interval.

A: Express the expression for the confidence interval. C.I=p±Z*p(1-p)n Here, Z* is the critical value .…

Q: b) Construct the 99% confidence interval for the population mean duration of the longdistance calls…

A: Standard error(sample mean) Sample mean  Z alpha=0.01 = 2.58

Q: Out of a sample of 1,450 people, 1,000 said they prefer to drive themselves to work rather than…

A: Given Data: x=1000 n=1450   p^=10001450=0.6897   z-value corresponding to 95% Confidence…

Q: 5. The Roper Organization conducted a poll of 2000 adults and found that 382 regularly listen to an…

A: Determine the point estimate of the proportion. The point estimate of the proportion is obtained…

Q: If n = 560 and ˆpp^ (p-hat) = 0.25, construct a 99% confidence interval.

A: Calculations: x=140 and N= 560

Q: Suppose a researcher found that M= 30.00 and SEM= 3.00. What are the limits of the 68% confidence…

A:

Q: he figure to the right shows the results of a survey in which 1001 dults from Country A, 1014 adults…

A: Given, Sample size For AnA=1001Sample size For BnB=1014Sample size For Cnc=1000Sample size For…

Q: Among the 765 participants, 1737 falls occurred over the 4.3 years of follow-up, of which 173 (10%)…

A: confidence interval

Q: consider  a random sample of 300 students in a university,75 of them declared that they like playing…

A:

Q: Of 380 randomly selected medical students, 210 said that they planned to work in a rural community.…

A: Solution: Let X be the number of medical students said that they planned to work in a rural…

Q: According to a survey by Runzheimer International Suppose this figure was based on a sample of 27 d…

A: As the population standard deviation is not known, we will use t-distribution. The number of degrees…

Q: If n=120 and p (p-hat) =0.31, find the margin of error at a 99% confidence level Give your answer to…

A: Sample size, n = 120 p^ = 0.31 99% confidence level

Q: A past survey of 1,068,000 students taking a standardized test revealed that 8.5% of the students…

A: Solution: From the given information, n1=1,068,000, p1-hat=0.085, n2=1,476,000 and p2-hat=0.092. The…

Q: If n=270 and ˆpp^ (p-hat) =0.59, find the margin of error at a 99% confidence level Give your…

A: Given  n=270, pcap=0.59, alpha=0.01 Zcritical=2.578 at alpha=0.01 We want to find margin of error

Q: Out of 6,000 people, 4,500 said they spend over 20 hours per week on their phones. Construct a 75%…

A: From the provided information, Sample size (n) = 6000 4500 said they spend over 20 hours per week on…

Q: If n = 500 and ˆpp^ (p-hat) = 0.2, construct a 99% confidence interval.

A:

Q: "Trydint" bubble-gum company claims that 7 out of 10 people prefer their gum to "Eklypse". Test…

A: The Null hypothesis is H0: p=0.7Alternative hypothesis is Ha: p not equal to 0.7

Q: 1. In a poll of 2,500 likely voters, 966 say that the Philippines spend too little on education.…

A:

Q: 1- A researcher wants to learn the ratio of smoking habit among the university students. Out of 1000…

A: For male students, sample size is n = 1000 And number of students who said " yes I am smoking", X =…

Q: Of 266 employees selected randomly from one company, 13.53% of them commute by carpooling. Find the…

A:

Q: A survey of 503 women shoppers found that 46% of them shop on impulse. What is the 99% confidence…

A: Given : Sample Size, n = 503 confidence level,c=0.99

Q: Express the confidence interval 7 % < p < 17 % in the form of p + E.

A:

Q: In a survey of 1000 randomly selected adults in the United States, participants were asked what…

A: We need to find confidence intervals.

Q: Express the confidence interval 5.4 % < p < 15.2 % in the form of p + E. %

A: Solution

Q: If n = 520 and p^ = 0.85, construct a 99% confidence interval

A: Here, n = 520 and p hat = 0.85.

Q: A past survey of 1,068,000 students taking a standardized test revealed that 9.6% of the students…

A: Given : n1 = 1068000 p̂1 = 0.096 n2 = 1476000 p̂2 = 0.092

Q: Express the confidence interval 57.2 % Next Question

A:

Q: Out of a sample of 650 high school students, 321 take the bus to school every day. Construct a 99%…

A: Given,   The sample proportion is,

Q: Express the confidence interval 5.6 % < p < 14.4 % in the form of p ± E.

A: We need to use the concept of Confidence intervals

Q: Express the confidence interval 13.5 % < p < 31.5 % in the form of p + E.

A: Given confidence interval is 13.5%&lt;p&lt;31.5%   Express inform of p±E

Q: If n = 420 and ˆpp^ (p-hat) = 0.05, construct a 95% confidence interval. Round three places.

A:

Q: 2. A sample of 430 business applications included 150 men. Find the 99% confidence interval of the…

A: Answer:-  Given,  X=150 n=430

Q: In a sample of 159,949 First year college students, the National survey of student engagement…

A:

Q: 2) Suppose a college is planning to hold an event for students. In the survey of 130 on-campus…

A:

Q: If n = 120 and p = 0.9, construct a 99% confidence interval. %3D

A:

Q: Express the confidence interval (18.9 %, 30.1 %) in the form of p + E. %+ 196

A: Note: Please repost 2nd question as I can author only 1 question as per my policy Given data,The…

Q: Express the confidence interval (11.9 %, 29.5 %) in the form of p ± E. % ± %

A: The question is about presentation of confidence int.  Given : Confidence interval : ( 11.9 %, 29.5…

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.