Why are students missing so much school in the district? A district administrator chooses one of the elementary schools in the district and asks the principal to provide information about the number of absences and the excuse notes provided to the school.     4) What type of study does this describe?   a) Survey   b) Observational study   c) Experimental study

Q: principal surveyed 106 members of the senior class.  15 played only sports, 11 were only in music,…

A:

Q: 1.) If there are 41 data points in a set of data, what is the number of degrees of freedom? (Enter…

A: Solution:  If there are 41 data points in a set of data, what is the number of degrees of freedom?…

Q: 6. Can professional astrologers reliably determine when a person was born based on their…

A: As we are authorized to answer only three sub parts at a time, so below are the solutions of the…

Q: Which statement about student art prefernces is unbiased? A.surveying the first 5 students entering…

A: Statement which is unbiased is

Q: Why self-selection bias is a concern for survey design?             [answer in no more than 50…

A:

Q: A principal surveyed 106 members of the senior class.  15 played only sports, 11 were only in music,…

A:

Q: Nationally, 83% of Americans have earned a high school diploma.  We want to see if the proportion of…

A: We have to find sample proportion.

Q: A district in the Ashanti region town has 102 towns and villages. If you interviewed everyone living…

A: It is given that,  A district in the Ashanti region town has 102 towns and villages. It means we can…

Q: (ii) How many appendectomies lasted at least two and a half hours? (iii) How many appendectomies…

A: Minutes freq(f) rlt freq(f/n) Cumulative freq Percentage Cumulative freq 110 - 120 2 0.08 2 8…

Q: A calibration study needs to be conducted to see if the readings on 15 test machines are giving…

A: From the given information, Total number of machines which are giving similar results =15 Number of…

Q: A survey was conducted on a group of 190 students. 10 students are taking electrical, mechanical,…

A:

Q: Suppose we were interested in the influence of interviewer friendliness upon householders' responses…

A: Given the data as Set Interview 1 Interview 2 Interview 3 1 0 0 0 2 1 1 0 3 0 1 0 4 0 0 0…

Q: And a pool, 102 of 1020 randomly selected adults age 18 or older stated that they believe there is…

A:

Q: We are interested in estimating the proportion of people that can identify Nebraska but not Vermont.…

A: Introduction: The confidence interval for the population proportion, p at the 100 (1 – α) % level of…

Q: What is the target population?  A. All food chains  B. All food chains in NYC  C. All food chains…

A: Given that The government studies the impact of the quarantine on NYC's food chains by interviewing…

Q: 4) 57% of kids can't wait for spring break. How many kids on average would we need to survey to find…

A: Geometric Distribution: Let us assume there is a sequence of trials, each having two outcomes, say…

Q: Alex's target population for his study are the employees of hotels in Mindanao. Since there are too…

A: Situation Sampling procedure Justification 1. Clustering Sampling technique Here from all hotels…

Q: To investigate whether middle school students think that being overweight is under a child's…

A: It is been asked to summarise the given information in two way frequency table.

Q: Assuming that boy and girl babies are equally​ likely, what would be​ Kathy's probability of having…

A:

Q: What is the purpose of selecting the survey targets randomly?

A: Sampling is the process by which inference is made to the whole population by examining a part. The…

Q: 5. A clinical researcher is conducting a study using an FDA approved medication that helps patients…

A: Given that  The researcher obtain a sample size (n)= 350 Believe that medication works on 75% of the…

Q: orty one cities were researched to determine whether they had a professional sports team, a…

A: For the given information, the venn diagram is,

Q: 15.1 #4

A: Given survey is, Whether or not people are better off economically this year than last year. After…

Q: 17. The Fox TV network is considering replacing une oi is prime-time crime investiga- tion shows…

A: As per the question we have No of people who watch comedy show x = 250 Sample size (n) = 400

Q: Unemployment and relationship problems:  A USA Today/Gallup poll conducted between 2010 and 2011…

A: From the provided information,

Q: A report described a survey of parents of children under the age of 18. Each person in a…

A: Confidence interval are used to measure the true parameter range lies. It is calculated by the…

Q: randomly divided into two groups by the researchers. For three consecutive nights, one group was…

A: Solution:-

Q: 8. Premier Doug Ford would like to survey the province of Ontario to get feedback on the new license…

A: Sampling: Sampling can be defined as the selection of some units from a population instead of the…

Q: 3. A light bulb manufacturer finds that 4% of the bulbs it makes are defective. The quality control…

A: We will calculate percentage of 700 out of 15500 if it becomes 4% then we can agree.

Q: e people eligioi gnificance level to test the claim that the selection kican ancestry. Does the jury…

A: Z-test: This test is used to determine whether two population means are different when the variances…

Q: A social researcher decides to test whether an individual's age and their opinion on the…

A: Df: The number of rows is 4 and the number of columns is 3. Df =(r-1)(c-1) = (4-1)(3-1) = 6.

Q: 6. Can professional astrologers reliably determine when a person was born based on their…

A: a) The null hypothesis is, Given that, x = 35, n =116 (a)   H0: The astrologers can match birth…

Q: In independent sample tests, what is the best way to ensure equivalence between samples?…

A: Given  A multiple choice question based on independent tests. Please find the below attachment for…

Q: 4 A garage keeps records of the last 94 cars tested for roadworthiness. The main reasons for failing…

A: Let us denote:T=failed for tyresS=failed for steeringB=failed for bodyworkGiven that n(T)=34,…

Q: According to the table, what was participant #1693.00 cognitive score before and after coffe

A: We are given: Number of observations, n = 8  Part 1: Let the missing Score for age_category be X, we…

Q: In a sample of 310 people, 186 completed only high school, 24 completed only some college, 93…

A: Given data A sample of 310 people is given. 186 completed only high school. 24 completed only some…

Q: What proportion of 20% of defective items should a supervisor in the quality system of a plastic…

A: a) What proportion of 20% of defective items should a supervisor in the quality system of a plastic…

Q: Assume an analyst needs to deliver a tv show, highlighting in-depth interviews with state governors…

A: Given, 50 states and a table of random numbers. 10 samples from 50 states are to be selected.

Q: Suppose we want to compare the GPA for students in at least three different social classes (Upper,…

A: It is given that the researcher wants to compare the GPA students in three different social classes.…

Q: in each classroom.The researcher is concerned about differences in family income levels among the 30…

A:

Q: uman blood is classified by the presence or absence of three main antigens (A, B, and Rh). When a…

A: Given data: The given table is, Blood Types A+ A- B+ B- AB+ AB- O+ O- Percent 35.9 6.3 9.5 1.5…

Q: The Bureau of Transportation reports on-time performance for airlines at major airports.  JetBlue,…

A: 30% of the arriving flights at this terminal are JetBlue flights, 32% are United flights, and 38%…

Q: 2.7 The circuit judges in a rural county are considering a change in how jury pools are selected…

A: The answers to the above questions are as follows :

Q: in a survey of 14 college students, it was found that 9 were taking an English class, 7 were taking…

A: We can solve given problem by Venn- diagram:

Q: Find: a. Find the number of people who read at least one of the daily newspapers. b. Fill in the…

A:

Q: In a survey, it was found that 80% of adults operate the flusher of toilets in public restrooms with…

A: Given information- Sample size, n = 300 The proportion (p) is = 0.80 Now, from Binomial to normal…

Q: e are interested in estimating the proportion of people that can identify Nebraska but not Vermont.…

A:

Q: Two ad agencies want to understand issues that are important to students. Agency A will interview 50…

A: Agency A is selecting 50 random students from school enrollment data Agency B is selecting 50…

Q: An experiment is planned to compare three types of schools—public, private- nonparochial, and…

A: Given :- An experiment is planned to compare three types of schools—public, private nonparochial,…

Q: 2. A survey on a sample of 35 new cars being sold at a local auto dealer was conducted to see which…

A: Given

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.