n a random sample of 61 professional actors, it was found that 22 were extroverts. Find a 95% confidence interval for p.

Q: Of 363 randomly selected medical students, 20 said that they planned to work in a rural community.…

A:

Q: A random sample of 25 statistics students was asked: "Have you smoked a cigarette in the past week?"…

A: From the provided information, Sample size (n) = 25 Six students reported smoking within the past…

Q: In Cleveland, a random sample of 74 mail carriers showed that 12 had been bitten by an animal during…

A:

Q: From a simple random sample of 400 of the 1,395 colleges in our population, it was found that…

A: Given : 1395 colleges in our population  Population Size (N) = 1395 400 colleges selected randomly…

Q: Suppose that a random sample of 142 graduate-admissions personnel was asked what role scores on…

A: Given : Random sample of 142 graduate-admissions personnel Sample size (n)=142 Let X : No. of…

Q: An insurance company checks police records on 582 accidents selected random and notes that teenagers…

A: Given data, n=582 x=100  Create a 99.7 % confidence interval for the percentages of all auto…

Q: In a sample of 100,40 said they preferred Pepsi to Coke. A 95% confidence interval for the…

A:

Q: In a random sample of 850​ Americans, 385 reported that they work two jobs. Which of the following…

A: The known values are, The sample proportion is,

Q: In a random sample of 75 college students 60 of them had sunglasses.  Compute a 95% Confidence…

A: Thank you for posting the question. Since you have asked multiple question, we will solve the first…

Q: In a random sample of 500 people eating lunchbat a cafeteria on various fridays, it was found that…

A: Given X=160 n=500 P=X/n

Q: In a random sample of 400 industrial accidents, it was found that 231 were due at least partially to…

A: Confidence level : 1-α=0.99 . Sample size : n=400 Number of success : x=231

Q: A random sample of 320 medical doctors showed that 162 had a solo practice. Let p represent the…

A: Given,

Q: Of 127 randomly selected adults, 31 were found to have high blood pressure. Construct a 95%…

A: Given that, Of 127 randomly selected adults, 31 were found to have high blood pressure.  X = 31 N =…

Q: A poll of 827 students at Alpha state college found that 61% of those polled preferred a quarter…

A: It is given that the proportion of the students who preferred a quarter system to a trimester…

Q: In a sample of 100, 40 said they preferred Pepsi to coke. A 95% confidence interval for the…

A:

Q: A local health centre noted that in a sample of 400 patients, 80 were referred ta hospital. a.…

A: Given, n = 400            x = 80 Therefore, population proportion p^ = 80400 = 0.2 The critical…

Q: In a survey of 612 randomly selected female college students, 141 report that they had been sexually…

A: Given Information:n=612x=141c=95%=0.95

Q: In a random sample of 810 medical professionals, 81 prefers to work in the evening shift.  The width…

A: Given,n=810x=81p^=xnp^=81810=0.11-p^=1-0.1=0.9α=1-0.95=0.05α2=0.025Z0.025=1.96

Q: In a clinical trial, 50 patients who received a new medication are randomly selected. It was found…

A: Solution: Let X be the number of patients suffered serious side effects from this new medication and…

Q: A nutritionist believes that obesity is more prevalent among American adults than it was in the…

A: Hence we are given that; x1=380, n1=1630x2=726, n2=2350 Hence the sample proportions are;…

Q: The career center at a large university surveyed a random sample of students who graduated the…

A: First, we need to calculate the proportions of engineering and business majors who were able to find…

Q: n a randomly selected group of 750 automobile deaths, 240 were alcohol related. Construct a 95%…

A: Given that,  x = 240, n = 750 The value of sample proportion is,

Q: search for the Ford Motor Company, you find that a random sample of 800 households includes 721 in…

A: At 98% confidence level, the z value is 2.33 which can be obtained by using the standard normal…

Q: in a random sample of 60 students from a very large university, only 25% were able to identify…

A: Given Sample size n=60, sample proportion p^=0.25  Construct 95% CI for population proportion p

Q: Of 2019 employees selected randomly at a company, 10% of them commute by carpooling. Construct a 90%…

A:

Q: In a random sample of 145 students, we find that 53% have attended a baseball game at some point in…

A: Given,sample size (n)=145sample proportion(p^)=0.53α=1-0.95=0.05α2 =0.025z0.025 =1.96

Q: Of 100 patients selected at random from a clinic, 33 were found to have high blood pressure.…

A:

Q: In a random sample of 575 American goods, about 46.3% of them were transported by rail in 2017.…

A: Given,   Sample size = 575 Sample proportion = 0.463   Critical value: Using z-table, the z-critical…

Q: Insurance companies are interested in knowing the population percent of drivers who always buckle up…

A: Givenx=316sample size(n)=391Confidence level=95%p^=xn=316391≅0.8082

Q: Of 346 items tested, 22 are found to be defective. Construct the 98% confidence interval for the…

A: Solution: Let X be the number of items found to be defective and n be the sample number of items…

Q: Insurance companies are interested in knowing the popul drivers who always buckle up before riding…

A: Given data,No of people surveyed n=387who claims to buckle up is x=311Construct a 93 % CI?

Q: A sanatorium conducted a study on 3,500 women over 35 years of age, of whom 220 reported having…

A: Step 1: State the given data: number of favorable cases, x = 220sample size, n = 3500confidence…

Q: In a random sample of 184 college students, 97 had part-time jobs. Find the margin of error for the…

A: Given : Sample Size, n = 184 Number of successes, x = 97 confidence level,c=0.99

Q: According to a recent Government survey, 6% of all merchandise sold in the U.S. gets returned.  A…

A: It is given that sample size (n) is 80 and x is 12.

Q: In a random sample of 500 deer hunters it is found that 114 filled their tag (i.e. got a deer).…

A: INTRODUCTION :  CONFIDENCE INTERVAL FOR POPULATION PROPORTION           Let P be the proportion of…

Q: A simple random sample of 1000 people age 18 or over is taken in a large town. It turns out that 189…

A: The objective of this question is to calculate a 95% confidence interval for the percentage of…

Q: In a study of the relationship between alcohol use and bicycling fatalities, the researcher…

A:

Q: in a study of 150 randomly selevted accidents that required treatment in and ER 36% involed children…

A:

Q: In a sample of 95 recommendations, it is found that 56% of them made money. Determine the upper…

A: Proportion is almost similar to the concept of probability. Proportion is a fraction of population…

Q: In a random sample of 250 students who enrolled in Science, 150 took notes during classes. Find an…

A: Given that n=250,x =150,alpha =0.05 Find an approximate 95% confidence interval for the population…

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.