Suppose the study described in the previous question was conducted by a colleague.  He tells you that based on a chi-square distribution with 2 degrees of freedom, his p-value was 0.11, and he concludes that the proportions are not the same across health status categories.  Do you agree with his conclusion? Yes, by rejecting the null hypothesis, it does appear that the proportions are not the same.     Yes.  He should have not rejected the null hypothesis and concluded that they do not appear to be related.     Yes. a p-value > 0.05 always indicates that variables are related regardless of the test conducted

Q: If a researcher finds there is a statistically significant difference, that researcher can…

A: If a researcher finds there is a statistically significant difference, that researcher can…

Q: Given a sample mean of xbar=27 and a population standard deviation of σ=3.5 from a previous study…

A: Givensample size(n)=16mean (x)=27standard deviation(σ)=3.5 claim:-μ<30α=0.05

Q: Suppose random variable X follows a normal distribution with mean 10. If 16% of observations from…

A:

Q: You wish to test the following claim (HaHa) at a significance level of α=0.001α=0.001.…

A: We have given that  Sample sizes n1=10     , n2=12        Sample means X̄1=54.6      , X̄2=41.8…

Q: From a Poission distribution with mean 1, let y1, y2, Y3, ... , yn be a random sample. The following…

A:

Q: A simple random sample of size n=16 is drawn from a population that is normally distributed. The…

A: Given information : Sample size = n = 16 Sample mean = x = 66 Sample standard deviation = s = 19…

Q: A manufacturer of chocolate chips would like to know whether its bag filling machine works correctly…

A:

Q: Based on the data from question 8, for testing if first-borns population (group 1) have a larger…

A: as per guideline expert have to solve first question only .

Q: You are planning to conduct a 2-sample t-test to determine whether the mean of one normally…

A:

Q: The IE Dept. is interested in the mean age of a certain population. A random sample of 10…

A:

Q: Experiment 2: Shoe sizes are collected from a random sample of 8 fathers and their adult sons to…

A: Given information: Shoe sizes are collected from a random sample of 8 fathers and their adult sons.…

Q: A manufacturer claims that the average lifetime of its lightbulbs is equal to 36 months. A random…

A: Given Mu= 36 x=32 S=11 n = 64

Q: As we noted previously, even a very small effect can be significant if the sample is large enough.…

A: Solution-: Given: r=0.60, n=25  To test, Hypothesis: H0: There is no significant relationship…

Q: A snack food manufacturer estimates that the variance of the number of grams of carbohydrates in…

A: Consider that σ2 is the population variance of the number of grams of carbohydrates in serving of…

Q: he records of a casualty insurance company show that, in the past, its clients have had a mean of…

A: The null hypothesis can be defined as the hypothesis of no difference or equality, while the…

Q: Which of the following can cause the usual OLS t statistics to be invalid (that is, not to have t…

A: Introduction: Heteroskedasticity is a situation in regression analysis, when the variability of the…

Q: All of the following statements are true about paired-sample t tests EXCEPT ______. 1 - They can be…

A: True statements: 2 - They can be used when the population variance is unknown. 3 - They compare…

Q: If X has a normal distribution with mean 1 and variance 4, then P[X² - 2X ≤ 8]?

A:

Q: or each of the following, assume that the two samples are obtained from populations with the same…

A: NOW HERE GIVEN   N1=7, S12 = 142 AND  N2=7, S22= 110

Q: Test the following hypotheses: H0:  σ=1.2 vs. H1: σ≠1.2 Equivalently, we have the hypotheses: H0:…

A: Given data : sample size, n = 25 population standard deviation,σ= 1.2 sample…

Q: A sample of n= 4 scores has a variance of s 64. What is the estimated standard error for the sample…

A: Givensample size(n)=4variance(s2)=64

Q: You have a population of 100 engineering students at a certain university and you want to interview…

A: Assume, n be the minimum sample size required. N be the population. p^ be the sample proportion of…

Q: the sample. After treatment, the sample mean is found to be M = 35. %3D a. If the sample variance is…

A: a) Given Data: x¯=35sd=32          n=8   H0: μ=40 HA: μ≠40   Under H0: x¯-μsd/n~ tn-1

Q: The following estimators of A: î1 = y â2 = n(y1 + y2 + …·+ yn) ... Yı + y2 3 2 Y1 п From a Poission…

A:

Q: Suppose again the population mean were equal to 100, with standard deviation equal to 15, but this…

A: Given that the population mean were equal to 100, with standard deviation equal to 15,

Q: A sample of size 10 has a mean of 27 and a standard deviation of 5.5 is to be used to test the null…

A: The provided information are: Sample size =n=10 Sample mean=x¯=27 Sample Standard deviation=s=5.5…

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A: Given information Claim: - Standard deviation of the number of accidents per day is no longer equal…

Q: A random sample of size n = 19 observations was drawn from a normal population with variance o? =…

A: Note: Thank you for the question. Since multiple subparts are posted, we are answering the first…

Q: A random sample X1,X2.Xn comes from a population about which you know, essentially, nothing. If n…

A: Given that the random sample X1, X2, …,Xn of size n≥50 is taken from population.

Q: (a) The random samples of size n from an infinite population has a standard deviation of two. Show…

A: Introduction: It is required to show that precision of the estimator for μ will be increased when…

Q: A. Which of her interns reported a reasonable p-value? Explain. Hint: The precise p-value cannot be…

A: Here given  A researcher wonders if a “majority” of all residents of a particular city were in favor…

Q: Assuming that the sample variances are continuous measurements, find the probability that a random…

A:

Q: Solve The Following items and show your solution. 1. The weight of goats at a farm is normally…

A: Hello! As you have posted 2 different questions, we are answering the first question. In case you…

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A:

Q: Suppose we have the following data collected from three randomly-selected counties:  1.What is the…

A: Solution-: Given data: Let, x= % with HS Degree and y=% in Poverty  Country xi yi A 90 5 B…

Q: If the sample mean and sample standard deviation are found to be 90 and 15 respectively and the…

A:

Q: Following from the last question, imagine, over the course of your study more participants in the…

A: Here correct answer is, There is now more individual differences within the violent video game…

Q: A population of scores has u = 50 and o = 5. If every score in the population is multiplied by 3,…

A: If a constant value multiplies to each score in distribution, then the mean and standard deviation…

Q: Suppose X1, .., Xn, for n > 1, are sampled independently from a distribution with mean u and…

A: a. From the given information, EXi=μVXi=σ2 a. Consider, EX1=μEX1+Xn2=12EX1+EXn…

Q: A sample of difference scores from a repeated-measures experiment has a mean of MD = 5 with a…

A: The formula for effect sizes is d = (MD - uD ) /s

Q: α=0.05​, is there enough evidence to reject the​ manufacturer's claim? Assume the population is…

A: The provided sample variance is s2=1.22s^2 = 1.22 and the sample size is given by n=16n = 16 Null…

Q: The owner of a fitness watch would like to determine if the mean number of steps he takes per day…

A: Statistical hypothesis testing is a method in inferential statistics which is a branch of…

Q: A battery manufacturer claims that the lifetime of a certain type of battery has a population mean…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: the p-value for this hypothesis test would be ________.

A: Given : n1=35 , n2=39 , X1-bar=64.5 , X2-bar=63.6 ,  σ1=3.0 , σ2=3.5 Our aim is to find the p-value.…

Q: A marketing researcher would like to compare the mean amounts that men and women spend on Christmas…

A: Null and alternative hypotheses: Null hypothesis: Null hypothesis is a statement which is tested for…

Q: In a test of the null hypothesis HO: p= Based on these statistics, which of the following…

A: Solution: Given information: μ=10  Population mean x= 13.4   Sample mean

Q: A 2011 survey, by the Bureau of Labor Statistics, reported that 91% of Americans have paid leave. In…

A: Thanks for giving opportunity to serve for bartleby students,   Hey, There ! Thank you for posting…

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.