An ecology class used binoculars to watch 23 turtles at Walden Pond. It was found that 18 were box turtles and 5 were snapping turtles. What kind of study is this? -observational -census -simulation -experimental

Q: Could it be that smoking actually increases survival rates among​ women? The accompanying data…

A: The accompanying data represent the​ 20-year survival status and smoking status of 1334 women who…

Q: For this group of students, does the data suggest that the events "Spanish" and "Male" are…

A: Given   spanish French german boys 10 2 8 girls 15 12 3

Q: tudies if age correlates with the average number of hours of sleep, so she selected a random sample…

A: Given: sample size(n)=10   Age(x) Hours of sleep(y) xy x^2 y^2   8 8 64 64 64   15 8 120 225…

Q: Advertisers contract with Internet service providers and search engines to place ads on websites.…

A: Given data is appropriate for z-test for single proportion . because it is a large sample…

Q: The data collection method can best be described as O Census O Controlled study O Clinical study O…

A:

Q: he manager of a factory has devised a detailed plan for evacuating the building as quickly as…

A: Let us the first sample of fire drills and the second sample of closing time, we have     Sample…

Q: 3. How was the data collected?

A: Data collection is an important part because the whole analysis will depend upon the collected data.…

Q: The following data were obtained to examine the effects of anxiety levels (low and high) and 3…

A: Given information: The investigator is specially interested to examine the effects of 2 anxiety…

Q: An oil company conducts a geological study that indicates that an exploratory oil well should have a…

A: Given that  n=5 , p=20%=0.20 , q=1-p=1-0.20=0.80 X~Binomial(n=5,p=0.20) p=probability of chance of…

Q: Which data collection method is defined as "the manipulation of variables under controlled…

A: We have to find correct answer from given options

Q: Twenty-two subjects are tested, given a training session, and then retested. What test do you…

A: Dependent samples: If the sample values from one population are associated or matched with the…

Q: . The administrator of a new paralegal program at Seagate Technical College wants to estimate the…

A: Note: Hi there! Thank you for posting the question. As you have posted multiple questions, we have…

Q: Comparing a census of a large population to a sample drawn from it we expect that the

A: We know, Sample is usually a more practical method of obtaining the desired information.

Q: Do sports drinks help prevent cramps in endurance sports? At the end of a marathon, officials will…

A: Observational study: In observational study, the individuals of the study are observed by the…

Q: The University of Colorado conducted a Halloween candy consumption study. The researchers measured…

A: The descriptive statistics is conducted using EXCEL. The software procedure is given below: Enter…

Q: Stacy conducts a study to look at the effects of season (fall, winter, spring, summer) and type of…

A: Two way ANOVA:   From the given information, the data view of the given variables is,     fall…

Q: what kind of design do you have

A: The One-Way ANOVA is usually accustomed test the following: Statistical differences among the means…

Q: What proportion of the sample reported that they had been cyberbullied?

A: Givensample size(n)=14795No.of respondents say yes they had been cyberbullied(x1) = 2219No.of…

Q: You may need to use the appropriate technology to answer this question. Researchers at Purdue…

A: (a) State the hypotheses. Correct option: Option 2

Q: A study of US residents is conducted to assess the relationship between gender and if they have…

A: Test is that whether there is relationship between gender and if they have cardiomyopathy.

Q: In how many ways can a statistician select a sample of 15 people from a population of 90 people?

A: Given,A statistician select a sample of 15 people from a population of 90 people.

Q: experiment?

A: Given Data: Percentage of babies recovered fully = 40% Total babies in the hospital = 7 Let the…

Q: Changing jobs: A sociologist sampled 204 people who work in computer-related jobs, and found that 40…

A: We have given that,  Sample size (n) = 204 , favorable cases (x) = 40 Then,  We will find the 90%…

Q: emergency. An industrial psychologist believes that workers actually leave the factory faster at…

A: Let X1 be the random variable such that evacuation times during fire drills. x¯1 : Sample mean of…

Q: . An introductory stats professor hypothesizes that 50% of students learn best by watching the…

A: Test is that whether distribution of students is such that 50% of students learn best by watching…

Q: People who work out vigorously for an hour or more experience loss of electrolytes such as calcium,…

A: The following information has been provided:   Sample 1 = Water Sample 2 = Sports Drink…

Q: Suppose you want to study the effectiveness of calculators in College math classrooms by giving…

A: In experimental studies we assign some observation to one group and rest in the other group. After…

Q: Blank are more representative of a population, but blank are easier to obtain

A: The sample is a set of units that is obtained from a population, which represents the population.…

Q: A survey¹ asked a random sample of n = 2752 US adults whether they had visited a public library in…

A: From the provided information,

Q: If a researcher failed to use a random sample, how would this affect the research conclusion?   If…

A: Any test criteria's basic assumption is to select a sample that is random. A random sample would be…

Q: Give 5 examples of situations using this:  1. Retrospective Study 2. Observational Study 3.…

A:

Q: A physician recorded the number of seizures that each of 20 patients with severe epilepsy had during…

A: Introduction: It is required to identify the observational units and the population being studied.

Q: You are planning a cross-sectional study of the impact of chocolate milk shake drinking on obesity…

A: Sensitivity and Specificity: While measuring the effect of any given factor on a particular disease,…

Q: In a paired samples t test, explain the logic of difference scores (why do you need to find them to…

A: Paired t test:The paired t test is also defined as dependent- t test. It is used to test the mean…

Q: A sample of 38 oil industry executives was selected to test a questionnaire. One question about…

A: Note: Hi there! Thank you for posting the question. As your question has more than 3 parts, we have…

Q: Your sample consists of 103 subjects, with 60 successes. Calculate the test statistic, rounded to 2…

A: Given information: There are 103 students and 60 successes. Consider, the sample proportion is,…

Q: How does an observed sample mean qualify as a common outcome?

A:

Q: Illustrate the sample covariance of a sample with itself?

A: Sample Covariance is defined as  Let x and y be two variables. The sample covariance is defined as…

Q: Sleepwalking Based on a report in Neurology magazine, 29.2% of survey respondents have sleepwalked.

A: Consider, the probability that the survey respondents have sleepwalked is calculated for the given…

Q: How many independent variables are being tested in this study? 01

A: Given :  We have given that design matrix ,                               Level of anxiety…

Q: Please also explain why you determined whether or not the results are statistically significant.…

A: It is given that the mean scores for participants in Condition A and Condition B came out exactly…

Q: Ten individuals went on a low-fat diet for 12 weeks to lower their cholesterol. The data are…

A: Given Information:

Q: So far, Walter has scores of 18, 17, 19, and 21 points for the first four science quizzes. What does…

A: Walter scores of first four science quizzes is 18, 17, 19 and 21 points.

Q: We would like to know if Intel’s stock and Southwest Airlines’ stock have similar rates of return.…

A: Given :  We would like to know if Intel’s stock and Southwest Airlines’ stock have similar rates of…

Q: According to YCharts in 2018, the unemployment rate for 15- to 24-year-olds in British Columbia was…

A: Sample size = 400 Proportion of sample having unemployment of 15-24 years = 0.094  Proportion of…

Q: How many students use RStudio only for data analysis? How many students use at least two software…

A:

Q: Why is a scatter diagram important?

A: We have to explain why scatter diagram is important

Q: In a survey of 2933 adults in a nation, a poll asked people whether they smoked cigarettes and…

A: The chi-square  Test of independence determines whether there is an association between categorical…

Q: toto In physiology, an objective measure of aerobic fitness is how efficiently the body can absorb…

A: First we define hypothesis for the above test.  The Variables are weight, maximum-pulse and…

Q: The variablilty of statistics is described by

A: Variance describe the  variability in the data set.

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.