(a) A population has a mean of 0.1 and standard deviation of 2.1. Find the probahility that the mean of a random sample of size 900 will be negative. (b) The standard deviation of the amount of time it takes a college student to complete a project is 40 minules. A random sample of 64 students is taken. What is the probahility (p) that the sample mean will he more than 8 minutes less than the population mean ?

Q: Male and female populations of tortoises under 80 years old are represented by age in the table…

A: Here the given table is : Age males females…

Q: Five males with an X-linked genetic disorder have one child each. The random variable x is the…

A: Properties of probability distribution: The total probability of the distribution should be 1. Each…

Q: The scores on a test are normally distributed with a mean of 70 and a standard deviation of 14, find…

A:

Q: When we compute a standard deviation, we are trying to get a measure of the average distance of…

A: Let us understand better by assuming X1, X2, ...., Xn be n data points. Then,…

Q: Fabienne found the standard deviation of the residuals to be 1.30. Explain this value in context.

A: The standard deviation of the residuals shows that how much the data points spread around the…

Q: The scores on a test are normally distributed with a mean of 110 and a standard deviation of 22.…

A: Let X be the random variable from Normal distribution with mean (μ) = 110 and standard deviation (σ)…

Q: A simple random sample of 100 observations was taken from a large population. The sample mean and…

A: Given that ,                    sample size n=100                    Mean u=80…

Q: The scores on a​ driver's test are normally distributed with a mean of 100.   Find the score that is…

A:

Q: A random sample of 16 students showed a mean weight of 130lbs. The population standard deviation of…

A:

Q: In a population of exam scores, a score of X = 88 corresponds to z = 2 and a score of X = 79…

A: From the provided information, A score of X = 88 corresponds to z = 2 A score of X = 79 corresponds…

Q: Male and female populations of elephants under 80 years old are represented by age in the table…

A:

Q: The scores on the Accuplacer test and High School GPAs are normally distributed. The Accuplacer test…

A:

Q: It takes an average of 8 minutes for blood to begin clotting after an injury. An EMT wants to see if…

A: Solution:- from given information claim:  if the average of 8 minutes will increase if the patient…

Q: A simple random sample of 64 observations was taken from a large population. The sample mean and the…

A:

Q: It takes an average of 8 minutes for blood to begin clotting after an injury. An EMT wants to see if…

A:

Q: A teacher was interested in the number of times her students with ADHD interrupted her class each…

A: Given population mean is 25. average was µ = 27 and the standard deviation was σ = 1.2.  sample size…

Q: he scores of adults on an IQ test are approximately Normal with mean 100 and standard deviation 15.…

A:

Q: A population of score has μ = 90. In this population, a score of X = 100 correponds to z = 5. what…

A:

Q: Male and female populations of to under 80 years old are represented by age in the table below.…

A: The question is about frequency distribution.Given :

Q: In a study of speed dating, female subjects were asked to rate the attractiveness of their male…

A: Range of a data set is the difference between the minimum and maximum observations.

Q: The scores on a test are normally distributed with a mean of 150 and a standard deviation of 30.…

A: The normal distribution:A continuous random variable X is said to follow normal distribution if the…

Q: How would the P-value change? The P-value would remain unchanged because the variability measured by…

A: Hypothesis is an assumption that is being tested.

Q: The scores on the Accuplacer test and High School GPAS are normally distributed. The Accuplacer test…

A: The z-score of a random variable x is defined as follows: z = (x – µ)/σ. Here, µ and σ are the mean…

Q: There are two samples of children taken from a population. In the first sample, mean of age of 20…

A: Combined mean : To integrate two or more things into a single entity is to link them together.When…

Q: A population of N = 20 scores has a mean of = 10. One score in the population is changed from X = 25…

A:

Q: The scores on the Accuplacer test and High School GPAS are normally distributed. The Accuplacer test…

A:

Q: The scores on a test are normally distributed with a mean of 200 and a standard deviation of 30.…

A: The score that is 2 ½ standard deviation above the mean is obtained below:From the given information…

Q: If the population average height is 67" and you take a random sample of 25 people resulting in a…

A:

Q: The scores from the first exam of a pre-calculus class determined a mean of 73.5 and a standard…

A:

Q: The mean age of a random sample 25 people who were playing the slot machines is 48.7 years, and the…

A: That is, there is no evidence to conclude that the mean age of those playing the slot machines is…