You are performing a two-tailed t-test with a sample size of 31 If a α= 0.05, find the positive critical value, to two decimal places.

Q: In 1977, men who were under 50 years old had a mean weight of 175 pounds, with a standard deviation…

A: Given: mean(μ)=175standard deviation(σ)=18

Q: Blood sugars from eight patients in a rural clinic were recorded last summer by the local physician.…

A: Given data is120, 145, 200, 250, 79, 100, 894, 255sample size(n)=8standard deviation(σ)=5confidence…

Q: Below is the standard deviation for extreme 10k finish times for a randomly selected group of women…

A: Answer:     The correct answer is option  (a).

Q: Problem: Find the p-value if left-sided test, t-distribution, n = 45, Test Statistic = -2.5

A: Given Test is left tailed. n=45, test statistic=t=-2.5

Q: An article in the Journal of Strain Analysis (1983, Vol. 18, No. 2) compares several methods for…

A: Given: Sample size n = 9 Formula Used: Confidence interval = d ± t*sn

Q: Find the z-score that cuts off 65% in the body on the left.  (Hint: if you can’t find that EXACT…

A:

Q: frequency expected for Choose... row 1 column 3 is The frequency expected for Choose... row 1 column…

A: From given table, we have  The frequency expected for row 1 and column 3 is calculated by dividing…

Q: 1. The bank counter at Universitas Islam Indonesia will give the service to 0, 1, 2, 3, 4, or 5 or…

A: Here Given  the bank counter at Universities Islam Indonesia will give Service to number of…

Q: Good afternoon,  I hope this email finds you well. We have a research task due for Statistics at…

A: Hi carmen  I hope you are doing great in your life. So, firstly don't panic.  you have to go step by…

Q: Assume that a sample is used to estimate a population mean μμ. Find the margin of error M.E. that…

A:

Q: An investigation of the cases in the 15-19-year age group revealed that 22 of the reported cases…

A: Epidemiology

Q: An auto rental firm is using identical motors that are adjusted  to run at a fixed speed to test…

A: ANSWER :- Use the Excel And Perform the One way anova Followings are the steps to perform the One…

Q: We learned that there are 4 items by which we characterize a distribution in statistics. Which of…

A: Given : Four terms : a. Central tendency b. Homogeneity c. Skewness d. Kurtosis

Q: A researcher is interested in finding a 90% confidence interval for the mean number of times per day…

A: Givensample size(n)=127Mean(x)=29.3standard deviation(s)=14.4confidence level = 90%

Q: Use the normal distribution to find a confidence interval for a difference in proportions p1−p2p1-p2…

A: Given A 95% confidence interval p^1=0.20 n1=60 p^2=0.40 n2=80

Q: Consider the following model between net international reserves (NIR) and foreign liabilities (fl)…

A: Regression analysis

Q: Giving a test to a group of students, the grades and gender are summarized below A B 14 20 16 11 10…

A: Let p represent the population proportion of all female students who received a grade of A on this…

Q: Three players (Arlo, Melvin, Maxine) must divide a cake among them. The cake is divided into three…

A: From the given data, We have to choose divider There are 3 players, One of them is divider.

Q: A psychologist would like to know whether the change in seasons has any consistent effect on…

A: Use the Excel And Perform the One way anova Followings are the steps to perform the One way anova…

Q: A magazine reported that at the top 50 business schools in a​ region, students studied an average of…

A: According to the given information in this question We need to identify the null hypothesis and…

Q: X P(x) 0 0.2 B 1 0.3 2 0.1 3 0.4 Find the standard deviation of this probability distribution. Give…

A: Given data is x P(x) 0 0.2 1 0.3 2 0.1 3 0.4

Q: An elementary school with 5000 students offers a low-cost "hot lunch." Assuming a binomial…

A: Let X: number of students who purchase a hot lunch. X~binomial(n,p)where n=5000   and  p=35%=0.35

Q: et present value calculation) Carson Trucking is considering whether to expand its regional service…

A:

Q: If 80% ·of an ore stockpile consists of copper ore particl~s (the material or value) and 20% of…

A:

Q: X 0 P(x) 0.25 1 0.3 2 0.2 3 0.25 Find the standard deviation of this probability distribution. Give…

A: From the provided information, x P(x) 0 0.25 1 0.3 2 0.2 3 0.25

Q: You must estimate the mean temperature (in degrees Fahrenheit) with the following sample…

A: T distribution has used to calculate confidence interval.

Q: A barber shop has homogeneous, independent arrivals every 10 minutes.  The interarrival times are…

A: Queuing theory

Q: An experiment was conducted in order to determine if cerebral blood flow in human beings can be…

A:

Q: 8. A man invested $10,000, part at 5% and part is 9%. If the total interest was $660, much did he…

A: The principal is the amount that used to deposited initially. Interest is the amount that calculated…

Q: For a sample with s = 9, a score of X = 67 corresponds to z = +1.00. What is the sample mean?

A:

Q: 2) A class has 25 students. Each day, three students are chosen to present their work at the board.…

A:

Q: The red blood cell counts (in millions of cells per microliter) for a population of adult males can…

A: From the provided information, Mean (µ) = 5.5 Standard deviation (σ) = 0.3 X~N (5.5, 0.3)

Q: If, in a sample of n=16 selected from a normal​ population, X=58 and S=12​, how many degrees of…

A: Given data is n=16 X=58  S=12  the null hypothesis H0: μ=50

Q: The mean and the standard deviation of a normal population are 11,795 and 14054 respectively. If n=…

A:

Q: Q5. The sampling distribution of mean is the hypothetical distribution of means from all Possible…

A: Here we have to check whether given statement is true or false  "The sampling distribution of mean…

Q: A gun club performed an experiment with a randomly selected group of first time shooters. The…

A:

Q: In 2013, psychology researchers conducted an experiment featuring 40 undergraduate college students,…

A: Given the researchers conducted a hypothesis test to find if the proportion of correct answers is…

Q: A recent court decision supported a pilots decision to continue to his destination with a four…

A: Given that: The argument was that an aircraft will fly on two engines and that the probability of…

Q: P(x <83) P(x <83) = (Round to four decimal places as needed.) ....

A: It is given that  Mean, μ = 90 Standard deviation, σ = 5 Z-Score, Z = ( X - μ )/σ

Q: Coffe B1. In a variable selection exercise with a linear model, a data analyst fitted the model…

A: Given,:  A variable selection exercise with a linear model, a data analyst fitted the model using…

Q: Use the table below to find the standard deviation of the following data set: 17,18,19,30,32,48

A: Given that  Data set : 17,18,19,30,32,48  Sum of data values = 17 + 18 + 19 + 30 + 32 + 48  = 164…

Q: You measure 29 turtles' weights, and find they have a mean weight of 44 ounces. Assume the…

A:

Q: Given the following transition matrix with states 1 and 2 as absorbing states, what is the…

A:

Q: What conditions are necessary in order to use a t​-test to test the differences between two…

A: The objective is to identify the conditions that are necessary to use a t-test to test the…

Q: Suppose X~N(μ=10,σ=2). Find P(X> 11.6). Round you answer to 3 decimal places. Group of answer…

A:

Q: Which distribution should you use? You are approximating the proportion of the population in…

A: Sometimes observation are taken on qualitative characteristics. In this case number of observations…

Q: The makers of a smartphone have received complaints that the face recognition tool often doesn't…

A: The following information has been given: n1=80       p^1=0.70n2=75       p^2=0.56

Q: The length of time for one individual to be served at a cafeteria is a random variable having an…

A: Given: The mean time for one individual to be served at a cafeteria is μ = 4 minutes λ = 14 Formula…

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 17 for the population…

A: We have given that We have given thatStandard deviation(σ) = 17Margin of error (E) = 3 Confidence…

Q: Suppose Z has the standard normal distribution. Find the cumulative distri- bution function, density…

A: Given information: Z has the standard normal distribution.