our population? W

Q: A survey shows that 3/5 Australian adults are overweight and 1/10 Australian adults are obese. What…

A:

Q: You want to know what percentage of students own pets at your university. In asking 10 random…

A: In an observational study, researcher observes the individuals and measure the outcomes. In this…

Q: Suppose a sample of 158158 tankers is drawn. Of these ships, 135135 did not have spills. Using the…

A: It is given that, among 158 tankers 135 did not have spills.

Q: Horace Horsecollar is interested in the opinion of vacationers at Disney World.  He creates a short…

A: We know that in Systematic sampling method, we choose the first unit randomly and all the other…

Q: A consumer group surveyed 146 airplane travelers after a flight and found that 132 of them would fly…

A:

Q: quality conscious disc manufacturer wishes to know the fraction of disks his company makes which are…

A: Given Sample size =865 X=112

Q: Suppose that 43% of people own dogs. If you pick two people at random, what is the both own a dog?…

A: Given, Probabily of a person own a dog is 43 %

Q: A researcher divided subjects into two groups according to gender and then selected 200 members from…

A: Since we know that In stratified sampling we divided homogeneous groups from the heterogeneous…

Q: Suppose you wanted to know the proportion of students who wear glasses on campus and you went ahead…

A: you wanted to know the proportion of students who wear glasses on campus  you went ahead and survey…

Q: Find the vAriance of the sample data: 191, 215, 76, 262, 93, 163, 162, 268

A: Measure of dispersion measures the spread of the data. Standard deviation indicates how much the…

Q: In an election poll Mark recieved 17, 576,866 votes what is the continous data

A: Continuous data is the set of data, whose values can take any value with in a finite or infinite…

Q: a. What value should we expect for our sample proportion?

A: Let p be the population proportion of high school seniors who have a driver's license.Given that,

Q: A quality-conscious disk manufacturer wishes to know the fraction of disks his company makes which…

A:

Q: A senator wishes to estimate the proportion of United States voters who favor new road construction.…

A: The margin of error is 5% and the confidence level is 98%.When there is no prior knowledge about the…

Q: To compare average birth weight between autistics and non-autistic school children from the same…

A: The objective is to find the appropriate test to compare average birth weight between autistic and…

Q: A report shows that 32% of citizens want to move out of theirneighborhood. An alderman wants to test…

A: The objective of the question is to identify the appropriate statistical test to determine if the…

Q: A company wants to determine the frequency of the occurrence of invoice error. Suppose that in a…

A:

Q: age for the 16 countries with over 100 million population (

A: Find the median age for the 16 countries with over 100 million population (besides the US).

Q: A scientist surveys 2676 of the current 3308 patients taking a specific medication. What is the size…

A:

Q: Suppose 20% of cars are sportscars and that 30% of sportscars are red, and that 25% of all cars are…

A:

Q: A company wants to determine the frequency of the occurrence of invoice errors. Suppose that in a…

A:

Q: A software company is interested in improving customer satisfaction rate from the 54% currently…

A: Let p be the population proportion of customer satisfaction rate.Given that,Population proportion…

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.