Two reporters are both interested in finding the proportion of people in town who are unemployed. They each collect a random sample and use the proportion of unemployed people in the sample to run 100 simulations to determine a margin of error. The first reporter claims the proportion of unemployed people in town is 0.045 with a margin of error of 0.011. The second reporter claims the proportion of unemployed people in town is 0.037 with a margin of error of 0.02.

Q: A researcher is studying two types of medication that both treat hives. 23 out of the random sample…

A: It is given that: The level of significance (L) is 0.01.

Q: An education researcher wanted to examine whether there was a difference in academic performance…

A: a) The three measures of location are mean, median, and mode. The mean of a set of observations is…

Q: Give an example of a study that would collect univariate and quantitative data.

A: Give an example of a study that would collect univariate and quantitative data.

Q: A researcher uses a random sample of 200 people in prison in the United States to find that the…

A: Given information: Sample size, n = 200 people in prison. The sample proportion of the prison…

Q: If the statistical analysis shows that the percentage of men taking Vitamin E who de- veloped…

A: The researchers conducted a designed experiment by randomly selecting the healthy men from different…

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: what is the appropriate statistical analysis to determine whether males and females differ?

A:

Q: At the end of summer, the total weight of seeds accumulated by a nest of seed-gathering ants will…

A: Given, mean weight of seeds collected by 1 randomly chosen nest = 5 pounds            Standard…

Q: A cohort study examined the association between smoking and lung cancer after following 400 smokers…

A: RR = Risk of disease in (Group1)Risk of disease in (Group2)

Q: In a certain population, the mean price of the stock prices was 230, the median was 262, the…

A:

Q: In one​ city, 24​% of adults smoke. In groups of size 140 of​ adults, what is the variance of the…

A: Givenp=0.24n=140x~Binomial(n=140,p=0.24)P(X=x)=(nx)×px×(1-p)n-x      ; x=0,1,2...,n

Q: Dr. Ortega took a wide sample of people and timed them running a mile. There is a lot of variability…

A: Given that effect size for physical fitness is 29%

Q: Jeffrey thinks that students on the baseball team who drink Sporty brand sports drink score more…

A: In the given problem,  Jeffrey thinks that students on the baseball team who drink Sporty brand…

Q: .If you are at the 90th percentile in terms of GPA, then 90% of the sample has a lower GPA than you.…

A: Percentile : Percentile is the number such that certain percentage of data fall below that number.…

Q: Two reporters are both interested in finding the proportion of people in town who are unemployed.…

A: Two reporters are both interested in finding the proportion of people in town who are unemployed.…

Q: What are the advantages of conducting experiments with more than two groups or conditions?

A: To find: What are the advantages of conducting experiments with more than two groups or conditions?

Q: In the 5 models above, which variable, by itself, explains the greatest proportion of total variance…

A: Predictor P for variable X3 is larger among all other variables. Hence variable X3 explains that…

Q: A researcher is interested in the effect of the pandemic on social media use among college students.…

A: a) Here, The researcher is interested to know whether the students spend more time on social media…

Q: For each scenario listed on the left, determine whether the scenario represents an Indepenent…

A: To find the scenario listed represents independent samples or matched pairs.

Q: In a study, the number of students enrolled in an online section of Elementary Statistics was…

A: Given : In a study, the number of students enrolled in an online section of Elementary Statistics…

Q: kindly assist,   An epidemiologist who is working in Capricorn Department of Health investigated…

A: We have given that  Sample size n =10000 Favorable cases x =275 Sample proportion p^=x/n  =275/10000…

Q: If a study determines the difference in average salary for sub populations of people with blue eyes…

A: Given, As the study determines that the difference in average salary for sub-populations of people…

Q: In the general population, Democrats are estimated to have an average mental health index score of…

A: The summary statistics of mental health index for the general population is mentioned in the table.…

Q: In this investigation, you learn how to decide if a value of x2 is statistically significant. How…

A: Here we have been provided with two samples falling into various categories. We will use Chi-Square…

Q: In the recent Census, 3 percent of the U.S. population reported being two or more races. However,…

A: Given information: x1=9, n1=1000p1=x1n1=91000=0.009x2=17, n2=500p2=x2n2=17500=0.034

Q: When we have tied survival time values in the KM method, what you will observe in the survival…

A: The survival analysis can be defined as a branch of statistics for analyzing the expected…

Q: Alena has a pair of dogs, and she noticed they usually breed more male puppies than females. To…

A: Introduction: Denote p as the true proportion of male puppies born. In order to test whether each…

Q: If you choose to work with a t-score, how many degrees of freedom would you have?

A: Here given  Sample mean = 87 Sample size = n = 25

Q: You are conducting a study to see if the proportion of voters who prefer the Democratic candidate is…

A: The random variable voters follow binomial distribution. We have to test whether the proportion of…

Q: In a sample of 81 elements, the mean was 60 and the variance was 144. What is the standard error for…

A:

Q: Suppose, you are running an experiment for 'x' times where the probability of success in a single…

A: Given : It is a binomial distribution with two outcomes as either success or failure. Probability of…

Q: The r2represents the shared variance between a predictor and _______

A:

Q: What percentage of the variability in the number of delivery days for a car is NOT explained by…

A: From the given output, the R square value is 0.7105.

Q: data has extreme scores, what is the best measure of average?

A: The mean is the average value of the data set. It is calculated by summing up all the observations…

Q: Alena has a pair of dogs, and she noticed they usually breed more male puppies than females. To…

A:

Q: What will happen to the sample size if the percentage error becomes lower? Can you explain to me how…

A: From the given information we want to find solution.

Q: In a classic study, Shrauger (1972) examined the effect of an audience on performance for two groups…

A: There are 2 factors in this experiment. They are: esteem and audience

Q: A researcher is interested in the effect of the pandemic on social media use among college students.…

A: 1) The researcher wants to test the effect of the pandemic on social media use by college students.…

Q: In both qualitative and quantitative research, how do we present the data?

A: The data may come from a population or from a sample. Small letters like x, y represent the data…

Q: Explain the variance of the sum or difference of the two variables X and Y ?

A: Variance of sum of two variables: The variance of the sum of two or more random variable is equal to…

Q: Suppose, you are running an experiment for 1024 times where the probability of success in a single…

A: Given: The number of times an experiment runs is n=1024. The probability of success in a single…

Q: If a newborn lab rat receives a hormone and its weight (in ounces) is converted into a z score that…

A: The standard normal variable is z, which follows the normal distribution with the mean of 0 and…

Q: . In words, define the Random Variable for this test. b. Which distribution (Normal or student's-t)…

A: Given : In the recent Census, 3 percent of the U.S. population reported being two or more races.…

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: In a public opinion survey, 60 out of a sample of 100 high-income voters and 40 out of a sample of…

A: Given : x1= 60.0 n1= 100 x2= 40.0 n2= 75 significance level, 0.05

Q: In the past decades, there have been intensive antismoking campaigns sponsored by both federal and…

A:

Q: An athletic director proudly states that he has used the average GPAs of the university's sports…

A: Average is the one of the measure of central tendency. It is calculated by dividing the total of all…

Q: In a public opinion survey, 60 out of a sample of 100 high-income voters and 40 out of a sample of…

A: Given,n1=100x1=60n2=75x2=40p1=the proportion of all high-incomevoters whosupported a decrease in…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.