A two sample t test has taken place between the silver content in coins 1 & 4(photo attached). Question 1: please state the distribution used in constructing the confident intervals Question 2: State the parameter and show why the parameter takes the value it does.

Q: Hello Sir. Good Evening. I have a question in my home work related Statistics lesson. The following…

A: When the sample size for two samples are greater than 30 then we use z-statistic to compute the…

Q: Let X be a random variable that represents the length of time it takes a student to write a response…

A: GivenMean(μ)=6.3standard deviation(σ)=2.3Let X be a random variable that represents the length of…

Q: An IQ test it's designed so that the mean is 100 and the standard deviation is 10 for the population…

A:

Q: An educational psychologist thinks that the children in her gifted program have higher IQs than the…

A: Population mean μ=100Population standard deviation σ=15Sample mean x¯=123

Q: The graph of the waiting time (in seconds) at a red light is shown below on the left with its mean…

A:

Q: Question 6 n = ▼ You want to obtain a sample to estimate how much parents spend on their kids…

A: Given that  Margin of error =E =1 Population standard deviation =31.7

Q: three-point shots made per game over his career with a standard deviation of 1.23. What is the…

A:

Q: The average American gets a haircut every 39 days. Do college students get their hair cut less…

A: A hypothesis test is a statistical  method that uses sample data to evaluate a hypothesis  about a…

Q: a) Find the 95% prediction interval for the slope. Threshold value: tcrit Variance of the response:…

A: The regression equation is given by : y=a+bxa = interceptb=slope The formula for the confidence…

Q: The accompanying table describes results from groups of 10 births from 10 different sets of parents.…

A: The maximum value in the range of the girls is obtained below as follows:From the information, given…

Q: 3. A researcher is conducting a study to determine the mean trough dosage of medication for a…

A: We have to find out answer of given question....

Q: Suppose that, at the end of last semester, Marie gave her introductory statistics class a final…

A: The total number of students is 64A histogram plot representing the distribution of the  exam scores…

Q: A. we need to account for the degrees of freedom B. it's easier than the Z interval approach C.…

A: T interval is used as alternative method for estimating the interval for sample mean.

Q: Entry to a certain University is determined by a national test. The scores on this test are normally…

A: From the given information, Consider, X be the random variable that denotes the test score of a…

Q: Suppose that it is reasonable to regard these three samples as random samples from the three student…

A:

Q: A paper describes a study of the mating behavior of queen honeybees. The following quote is from the…

A:

Q: Empirical rule comparison and normality for Variable 1 Use the results from your chosen variable 1…

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

Q: What is the minimum required sample size to estimate an unknown population mean with confidence…

A: Given: Confidence level=99%  Margin of error, E=5.25  Population sd, σ=35.2

Q: One hundred men and one hundred women are surveyed to determine if the percent of women that lie…

A: Given that, One hundred men and one hundred women are surveyed to determine if the percent of women…

Q: Please answer number 9. All steps!! Make sure to show work!! Answer quickly!

A: 9.Each of the given data sets has

Q: Fifty married couples attend a retreat. The ages of the wife and husband in each relationship is…

A: Fifty married couples attend a retreat. The ages of the wife and husband in each relationship is…

Q: Use the Central Limit Theorem to find the mean and standard error of the mean of the sampling…

A: Given that  Sample size n =26 Population mean μ =250 Standard deviation =59

Q: Suppose the mean IQ score of people in a certain country is 100. Suppose the director of a college…

A: Decision rule : Reject H0 if P-value  <  α Here  P-value = 0.023 < 0.1 = α.

Q: A sign in the large private plane indicates a limit of 36 persons. Assume that the average weight of…

A: Sampling distribution of sample mean: If the population is normally distributed then the sampling…

Q: Claim: The mean pulse rate​ (in beats per​ minute) of adult males is equal to 69.2 bpm. For a random…

A: Claim: The mean pulse rate​ (in beats per​ minute) of adult males is equal to 69.2 bpm. For a random…

Q: You are testing the claim that the mean GPA of night students is different than the mean GPA of day…

A: The data on the GPA of night and day students is provided.For night students,Sample size, Sample…

Q: For a confidence level of 98%, find the critical value for a confidence interval on a one sample…

A:

Q: Please An IQ test is designed so that the mean is 100 and the standard deviation is 10 for the…

A: The following information has been provided: μ=100σ=10E=2

Q: An article in the journal Applied Nutritional Investigation reported the results of a comparison of…

A: Given Information: M1=4.2,s1=0.75,n1=10M2=5.3,s2=0.41,n2=12SM1-M2=0.25S2pooled=0.35α=0.05

Q: A standardized​ exam's scores are normally distributed. In a recent​ year, the mean test score was…

A:

Q: Every year, the students at a school are given a musical aptitude test that rates them from 0 (no…

A: The data of students' musical aptitude test scores is given.Aptitude scoreFrequency031524334253To…

Q: Engineers want to design seats in commercial aircraft so that they are wide enough to fit 95% of all…

A:

Q: A survey of 2,986 Americans ages 16 and older found that 80% of them read at least one book in the…

A: Given that, A survey of 2,986 Americans ages 16 and older found that 80% of them read at least one…

Q: The average number of accidents at controlled intersections per year is 4. Is this average a…

A:

Q: Im confused on #1.) Letter C. I already found the 68% range and the 95% range by using the empirical…

A:

Q: The graph of the annual snowfall distribution (in feet) for a particular county is shown below on…

A: