Under what circumstances can a very small treatment effect be statistically significant?a. With a large sample and a large standard deviationb. With a large sample and a small standard deviationc. With a small sample and a large standard deviationd. With a small sample and a small standard deviation

Q: ind the variance and the standard deviation for x and y in Table 1

A:

Q: What does a z-score of –1.5 mean? A.The mean is 1.5 standard deviations less than the measurement.…

A: 3. z-score: The z score determines how far the individual measurement is from the value of mean. If…

Q: Suppose ?X is normally distributed with ?=μ= 122 and unknown ?σ.  A sample of 26 observations yields…

A: We have given that,  X is normally distributed woth hypothesized mean (Mu) = 122 and standard…

Q: Use z scores to compare the given values. Based on sample​ data, newborn males have weights with a…

A: From the provided information, Newborn male have weights with mean (µM) = 3287.8 g Standard…

Q: The null and alternate hypotheses are: He: ₁ = ₂ H₂=₁ #₂ A random sample of 10 observations from one…

A:

Q: Sample X has a size of 6 and a variance of 2.3. Sample Y has a size of 10 and a variance of 0.6.…

A:

Q: For the samples summarized below, test the hypothesis, at a=.05 , that the two variances are…

A: Consider that σ1 and σ2 are the population standard deviations for populations 1 and 2,…

Q: A population has a meanu= 79 and a standard deviation o= 24. Find the mean and standard deviation of…

A: Obtain the mean of the sampling distribution of the sample means. The mean of the sampling…

Q: If the variance of a binomial variate is 16, then the standard deviation of the variate is O a. 16 O…

A: Let VarX be the variance and σ be the standard deviation The relation between the variance and…

Q: In the population of drivers, the mean number of traffic violations in the last 10 years is 5.2. In…

A: It is given that Population mean = 5.2 Sample mean = 4.25

Q: Response to allergen inhalation in allergic primates. In a study of 12 monkeys, the standard error…

A: From the provided information, Sample size (n) = 12 Standard error (SE) = 0.4

Q: The average mpg usage for a 2017 Toyota Prius for a sample of 16 tanks of gas was 44.5 with a…

A: a-1) Suppose μtoy, μford denotes the population average mpg usage for a 2017 Toyota Prius and for a…

Q: Blood glucose levels Tar obese patients have a mean of 100 with a standard deviation of 17. A…

A: Given The data is as follows: Population mean, μ=100 Population standard deviation, σ=17 Sample…

Q: Each year University Park estimates the standard deviation of the time it takes for the bus to…

A: The investigator is specially interested to test whether the variability in time has increased in…

Q: A magazine claims that the mean amount spent by a customer at Burger Stop is greater than the mean…

A: Given,the two fast-food restaurants and the mean money spent by the customers in both…

Q: 1. A student scored 65 on a calculus test that had a mean of 50 and a standard deviation of 10. She…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: standard painkiller is known to bring relief in 3.5 minutes on average (μ). A new painkiller is…

A: We have given thatMean(µ) = 2.5Sample size (n) = 40Sample mean (x̅) = 2.8Standard deviations (s) =…

Q: ket analyst believes that the average price of two securities (Stock A and Stock B) are equal. The…

A: As the population standard deviation is not known, we will use a t-test. The null and alternative…

Q: Student one claims that his grades this semester are higher than student two. They decide to test…

A: Given information : Student 1 : The number of classes for student 1 is The average grade is:…

Q: uppose ?X is normally distributed with ?=μ= 126 and unknown ?σ.  A sample of 34 observations yields…

A: we have given that  mu=126 ,xbar=120 ,s=4 sample size n=34  and sigma is unknown

Q: A simple random sample of 27 filtered 100-mm cigarettes is obtained from a normally distributed…

A: For the given data Perform Chi square test for one population variance

Q: Grant Harris goes to a popular senoir citizen clinic for his medical care. The clinic claims that…

A: Construct the 95% confidence interval estimate for the population standard deviation in Grant's wait…

Q: The salaries of professional baseball players are heavily skewed right with a mean of $3.2 million…

A: From the provided information,

Q: For a binomial variable X if n = 21 and p = 0.5. Find the variance?

A:

Q: We have a sample of 105 body temperatures having a mean of 98.45°F. Assume that the sample is a…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: The average mpg usage for a 2017 Toyota Prius for a sample of 10 tanks of gas was 45.5 with a…

A: The following information has been provided: n1=10               n2=10x¯1=45.5…

Q: If a variable has a  very small standard deviation, and the outcomes of the variable will... a.…

A: Standard Deviation: Standard deviation measures how dispersed your data in from the mean.

Q: The salaries of professional baseball players are heavily skewed right with a mean of $3.2 million…

A: Central limit theorem states that as the sample size become large(>30), the distribution of…

Q: Suppose the means and the standard deviations of the values are given in the table below:   CITY A…

A: No, there is not enough evidence to support the tax collector’s claim that the means are different…

Q: Assume that you have been provided the following information for a sample of cars The covariance…

A: The covariance between weight and miles per gallon is equal to -4.0 pound-miles. The standard…

Q: A random sample of 10 subjects have weights with a standard deviation of 12.6103kg. What is the…

A: A random sample of 10 subjects have weights with a sample standard deviation of 12.6103kg Using…

Q: Random samples of people from Maine, Texas, and Rhode Island have been given a scale that measures…

A: ANOVA:   ANOVA technique is used for comparing more than three groups. It is used for observing the…

Q: Assume that you have been provided the following information for a sample of cars The covariance…

A: The two variables of interest are: "miles per gallon" and "weight".The sample covariance (as the…

Q: You are interested in testing whether the average age of household heads is higher in the suburbs…

A: Given: For sample 1 (the household heads): Sample size (n1)=45Sample mean(x¯1)=44Standard deviation…

Q: In a mid-size company, the number of phone calls answered each day by each of the 12 receptionists…

A:

Q: If the standard deviation of hole diameter exceeds 0.01 millimeters, there is an unacceptably high…

A: Given,sample size(n)=15standard deviation(s)=0.008α=0.01H0:σ=0.01H1:σ>0.01

Q: company supplies a tool for pouring cold medicine into bottles in such a way that the standard…

A: Suppose that the population standard deviation of dispense amount of new process is .In a new…

Q: Allen's hummingbird (Selasphorus sasin) has been studied by zoologist Bill Alther.t Suppose a small…

A: In statistical inference, there are two types of estimation,  1) Point estimation and 2) Interval…

Q: Allen's hummingbird (Selasphorus sasin) has been studied by zoologist Bill Alther.t Suppose a small…

A: In statistical inference, there are two types of estimation,  1) Point estimation and 2) Interval…

Q: Which of the following options correctly describes how to obtain the estimated standard error in a…

A: standard error formula is SE= sigma/√n

Q: Conduct a hypothesis test to detemine the mean daly number of dicks for Design A Ma.is smaller than…

A: Now we have to construct the testing,   H0: μA-μB=0  Vs  H1: μA-μB<0 The test statistic T equals…