How do I run a the test of normality?  Assumptions of normality

Q: Compute r, the correlation coefficient, using the following data.  x 2 1 7 8 3 6 y 3 4 10 11 4 ...

A: In this question we have a given data for variable x and y, and we have to find the correlation coef...

Q: Determine whether or not sigma1 square is equal to sigma 2 square using a 5% significance level if w...

A: According to the given question, to test the hypothesis of H0: sigma 1 square  is equal to sigma 2 s...

Q: A marketing manager for a cell phone company claims that more than 55% of children aged 8-12 have ce...

A: Null and alternative hypotheses:Here, to check whether more than 55% of children aged 8-12 have cell...

Q: You are a graduate student in an M.D./Ph.D program, attempting a study of the efficacy of different ...

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you. ...

Q: Use the normal distribution of SAT critical reading scores for which the mean is 513513 and the stan...

A: NOTE:Since, the numbers on the values of mean and standard deviation are repeating twice (513513 and...

Q: Rolling Two Dice  If two dice are rolled one time, find the probability of getting these results A. ...

A: Hello there! There are more than 3 sub-parts in the question shared. According to our policies canno...

Q: Part b, c, d

A: Part b:Denote μ as the true mean breaking strength (after 24 hours) of the new bonding adhesive.The ...

Q: How would I construct a stem and leaf plot using these numbers 57 54 52 55 51 56 61 68 56 55 54 61 5...

A: Introduction:The numbers here are all two-digit numbers. So, you can consider the digit in the ten’s...

Q: The contingency table shows the distribution of a random sample of fatal pedestrian motor vehicle co...

A: a) The expected counts for each cell in the provided contingency table can be calculated by using th...

Q: Construct a boxplot for these numbers of state sites for Frogwatch U.S.A Is the distribution symmetr...

A: The given data is arranged in ascending order as shown below199, 235, 238, 242, 253, 289, 294, 314, ...

Q: Douglas is a farmer who believes that his cow produces an average of 7 gallons of milk per day. To t...

A: The aim is to find the range of p-value.

Q: A police officer claims that the proportion of accidents that occur in the daytime (versus nighttime...

A: Test statistic calculation:In this context, a police officer claimed that the proportion of accident...

Q: The Orchard Cafe has found that about 10% of the diners who make reservations don't show up. If 86 r...

A: Binomial distribution:A random variable X follows binomial distribution if it follows the given prop...

Q: In the EAI sampling problem, the population mean is $51,400 and the population standard deviation is...

A: It is provided that the population mean is $51400 and the population standard deviation is $4000.The...

Q: Zar (1999) describes an experiment in which 13 people with hemophilia were random oTeceve drug B and...

A: NOTE:Hi, the posted question is based on the data of haemophilia, but in part (a) it is asked to fin...

Q: In a normal distribution of pain estimates (0 = no pain, 100 = lots of pain) where μ = 25 and σ = 11...

A: The given information is that the normal distribution of pain estimates with mean 25 and standard de...

Q: I need help with understanding standard deviation.  How to calculate it from the mean?

A: The standard deviation describes the spread of the data distribution from the mean of the given data...

Q: Let x be a random variable that represents hemoglobin count (HC) in grams per 100 milliliters of who...

A: (A)The sample mean and standard deviation is calculated below:

Q: Flying over the western states with mountainous terrain in a small aircraft is 40% riskier than flyi...

A: (a) Poisson distribution is a good choice for the probability distribution of r:Poisson distribution...

Q: Five children aged 2, 3, 5, 7 and 8 years old weigh 14, 20, 32, 42 and 44 kilograms respectively. Fi...

A: Let x be the age of children and y be the weight of children.The equation of the regression line is:

Q: The CEO of a cable company claims that the population mean wait time for callers at a company's cust...

A: The aim is to find the accurate statement from the following options to evaluate the population mean...

Q: I want you to come up with one study idea that would use a one sample chi square and one study that ...

A: The one sample Chi-square test is also called as Chi-square goodness of fit, which is used to decide...

Q: Why is the sum of the sum of six deviations -2, -1, -1, -1, 0, 5 when added =0?

A: Solution:It is one of the property of sample mean that the sum of deviations above average and the s...

Q: Fifty-three percent of all persons in the U.S. population have at least some college education.  Cho...

A: According to the given question, Fifty-three percent of all persons in the U.S. population have at l...

Q: Let A and B be two events with P(A) = 0.71 and P(B) = 0.44. What is the largest possible value of P(...

A: In this question, we have the value of P(A) = 0.71 and P(B) = 0.44 and we have to find the maximum v...

Q: An economist is studying the job market in Denver area neighborhoods. Let x represent the total numb...

A: Scatter PlotIt is a Graph between two variables. It is plotted to check the relationship between the...

Q: Researchers conducted a study to determine whether magnets are effective in treating back pain. The ...

A: (a)To test whether the treatment is effective, the following null and alternative hypotheses are con...

Q: Consider the following data on x= height of a building and y = number of stories for nine notable bu...

A: Given data of x= height of building and y = number of stories for nine notable buildings as shown be...

Q: Let z=a be a positive z score in a standard normal distribution. If the area under z>a is 0.4, th...

A: Standard normal distribution:A normal distribution with mean (µ) 0 and variance (σ2) 1 is called sta...

Q: According to a random sample taken at 12 A.M., body temperatures of healthy adults have a bell-shape...

A: Chebyshev’s inequality:Chebyshev’s rule is appropriate for any distribution. That is, Chebyshev’s in...

Q: 1. In a random sample of 15 CD players brought in form repair, the average repair cost was $80 and t...

A: It is given that the average repair cost (mean) is $80, sample standard deviation s is $14, the samp...

Q: How do you calculate a coefficient of correlation of two indexes’ returns?

A: Let the two indexes’ returns be A and B.The coefficient of correlation measures the degree to which ...

Q: How much should a healthy Shetland pony weigh? Let x be the age of the pony (in months), and let y b...

A: Part (a):The scatter diagram, along with the best fitted line (least-squares regression line) for th...

Q: A statistical program is recommended. Electromagnetic technologies offer effective nondestructive se...

A: Hey, since there are multiple subparts posted, we will answer first three subparts. If you want any ...

Q: Find the critical value tc for the confidence level c=0.98 and sample size n=21

A:  The critical value tc for 98% confidence level with sample size 21:The confidence level is 98%. Tha...

Q: Is the magnitude of an earthquake related to the depth below the surface at which the quake occurs? ...

A: (a) Scatter diagram of the data:The line that best fits the data is least-squares regression line.Th...

Q: Which variable is most likely to be an independent variable? reading test score stress level runnin...

A: An independent variable is one whose variation does not depend on any other variable and it is under...

Q: 2. In a lab experiment, students estim is known to have a true value of 5% weight by volume, but stu...

A: Let X be the concentration estimate. X follow a normal distribution with mean 5% and standard deviat...

Q: What is the “third factor” problem concerning correlational studies as it relates to inferring causa...

A: The correlation between any two variables is the linear relationship between those variables, but it...

Q: High in the Rocky Mountains, a biology research team has drained a lake to get rid of all fish. Afte...

A: The proportion of tagged trout in the lake is, p = 700/2000 = 0.35Let X be the number of tagged trou...

Q: A doctor wants to research if there is any difference in birth weights of a mother's first and secon...

A: Given the following data of randomly selected 10 mothers with two children and difference in their b...

Q: How do I solve this question with this table? obtain this sample using the portion of the random num...

A: By using random number table we can determine the random sampling with equal chance of occurrences o...

Q: Can a low barometer reading be used to predict maximum wind speed of an approaching tropical cyclone...

A: In this question we have the data, using which we have to plot the scatter plot and best line of fit...

Q: Consider a drug testing company that provides a test for marijuana usage. Among 301 tested subjects,...

A: Given hypothesis testp be the proportion of wrong test results Null hypothesis : p = 0.10Alternate H...

Q: what would be the mean and standard deviation of each chart!! I am having trouble calculating this. ...

A: Calculation: Mean:Before mean:Control: (5 + 1 + 2)/3 = 2.67. [(Before Stephanie + Before Brenda + Be...

Q: Number 2 Please, Explain shortcut with TI84 if applicable

A: Given sample size n = 36Sample mean = 44Sample standard deviation = 5.2Level of significance = α = 0...

Q: Jane has stored three albums on her iPod. The first album consists of 11 songs by Frank Sinatra, the...

A: According to the given question, Jane has stored three albums on her iPod.The first album consists o...

Q: The Toylot company makes an electric train with a motor that it claims will draw an average of only ...

A: The provided information are:

Q: Using 50 random numbers given below, compute the mean and standard deviation 0.299752 0.939920 0.427...

A: Standard deviation of a sample tells how the values are spread out from mean of the sample. A low st...

Q: 1. Field tests if a low-calorie sport drink found that 80 of the 100 who tasted the beverage preferr...

A: Test whether there is enough evidence to conclude that the company should launch the product.State t...