High in the Rocky Mountains, a biology research team has drained a lake to get rid of all fish. After the lake was refilled, they stocked it with an endangered species of Greenback trout. Of the 2000 Greenback trout put into the lake 400 were tagged for later study. An electroshock method is used on individual fish to get a study sample. However, this method is hard on the fish. The research team wants to know the smallest number of fish that must be electroshocked to be at least 70% sure of getting a sample of two or more tagged trout. ? fish

Q: Jerri collects data from 100 people about how much mileage they put on their vehicle each week.…

A: Given information: Jerri collects data from 100 people about how much mileage they put on their…

Q: Some people seem to believe that you can fix anything with duct tape. Even so, many were skeptical…

A: Hypothesis test needs to be conducted for the claim that

Q: Calculate the residuals for the flocks identified. The residual for flock 2 is The residual for…

A: Solution: For the model Step(1)- ..........(1) Step(2)- Residulal is the difference of estimated…

Q: Researchers wanted to determine whether fence lizards learned to avoid fire ants. To determine this,…

A: Given information:- x¯Albama=32x¯Arkansas=44 Samples = 1000 Mean difference = - 0.192 Std. error =…

Q: from a sample of 980 people. We see that 379 of the 460 females in the sample support gun control…

A:

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

A:

Q: With a = .05, complete step 4 of the hypothesis testing procedure. What decision should the…

A: A test for making a claim about the population means is the  t-test for two means with unknown…

Q: Method A: Randomly divide a group of 100 people with minor cuts into two groups. Have each group use…

A: The appropriate nature (i.e., survey, observation, or experiment) of the considered methods, which…

Q: Three products were used in a hot summer to keep the pool chlorine level high. Each product was used…

A: Null Hypothesis: H0: There is no difference among the average amount of chlorine from all the three…

Q: Santa was interested in increasing toy productivity. He randomly assigned elves into 2 separate…

A: Introduction: It is required to identify the suitable type of test.

Q: The average number of cavities that thirty-year-old Americans have had in their lifetimes is 8. Do…

A: As per guidelines expert have to answer first question three subparts only dear student please…

Q: To compare the time they spent running on the wheel between the three different days (in other…

A: ANOVA To check the difference in mean excercise time of rats in three different conditions.

Q: At a birthday party, the menu consisted of burgers, chicken, salad and hotdogs. Approximately 300…

A: Attack rate: The ratio of a population at risk who develops the illness during a defined period of…

Q: A large jar contains an unknown number of red gumballs and 150 green gumballs.  As part of a seventh…

A:

Q: A 2009 study shpwed that handling money reduces the perception of pain. Two groups of participants…

A: From the given data set: Sample size for money (n1)=9 Sample size for the paper (n2)=9 Level of…

Q: survey research company uses random digit dialing. They have a contract to estimate the percentage…

A:

Q: What is the population in this study?

A: Given a study about the "childbirth fever".

Q: Due to stress, many patients who undergo major elective surgery experience an increase in blood…

A: It is needed to find the appropriate statistical test.

Q: A 2009 study showed that handling money reduces the perception of pain. Two groups of participants…

A: From the given information, its is clear that, Mean M1=7.56 SS =42.22 Sample size n1= 9 Sample…

Q: Because of safety considerations, in May 2003 the Federal Aviation Administration (FAA) changed its…

A: Confidence interval : ( 180.024, 185.976) interpretation: b. We are 95% confident that the true…

Q: Explain why we use this formula E=row total * column total/sample size

A: Given that::: E=row total * column total/sample size

Q: Jennifer wants to estimate the percentage of parents that use cloth diapers. She asks a randomly…

A: Solution: It is given that Jennifer wants to estimate the percentage of parents that use cloth…

Q: A worker at a frozen yogurt store has 2 3/4 cups of frozen yogurt to give to customers as samples.…

A: We have to find no. Of samples , using all the frozen yogurt.

Q: Some people seem to believe that you can fix anything with duct tape. Even so, many were skeptical…

A: Given that,sample one, x1 =60, n1 =103, p1= x1/n1=0.5825sample two, x2 =88, n2 =101, p2=…

Q: A popular blog reports that 45% of college students log in to Instagram on a daily basis. The Dean…

A: Given that:Sample size, Number of students logging in daily (Number of favorable cases), Level of…

Q: A test question is good if it discriminates between prepared and unprepared students. The first…

A:

Q: A large university has 24,000 student a randomly-selected sample of 750 students were surveyed  and…

A: Given that there are 24,000 students out of which a randomly selected sample of 750 students. out of…

Q: Do these data suggest that freezing is less successful than duct tape in removing warts? Test the…

A: Let pnitrogen denotes the population proportion of liquid nitrogen freezing who wart successfully…

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.