A data set has a mean of 40 and standard deviation of 8. -2 standard deviation = -1 standard deviation +1 standard deviation = +2 standard deviation =

Q: If the average weight for cats is 12 pounds and the standard deviation is 2 pounds. 95 percent of…

A: Given data:  average weight for cats = 12 pounds standard deviation = 2 pounds. To find: 95 % of all…

Q: The spread or dispersion of a set of data about the mean will be large if the standard deviation is…

A: Solution

Q: If the average weight for cats is 12 pounds and the standard deviation is 2 pounds. 68 percent of…

A: Given data: If average weight for cats = 12 pounds standard deviation = 2 pounds. To find: 68% of…

Q: The mean and standard deviation of 200 items are found to be 60 and 20 respectively. If at the time…

A:

Q: The mean height of students in a class is 152 cm. The mean height of boys is 158 cm with a standard…

A:

Q: The mean of a set of data is 108.06 and its standard deviation is 115.45 What is the z score for a…

A: Z-score = 3.3045 answer.

Q: On a standardized examination, Laura received a score of 83, which was exactly 2 standard deviations…

A:

Q: The average battery life of the Apple Iphone XR is 600 minutes.  The standard deviation is 30…

A: Given : mean = μ = 600 Standard deviation = σ = 30

Q: A data set has a mean of 300 and a standard deviation of 40. What value would have a z-score of z =…

A: z-score of z = - 2 is -7.55 Reason: z-score of z = - 2=-2-meanstandard deviation=-2-30040=-7.55

Q: The mean grade on a science test was 79 and there was a standard deviation of 6. If your sister…

A: We have given that,  Let X be the random variable from normal distribution with mean (μ)= 79,…

Q: Assume the cholesterol levels of adult American women can be described by a Normal model with a mean…

A: According to the given information, we have Mean = 188 mg/dL Standard deviation = 24 mg/dL

Q: The time taken to boil a kettle is normally  distributed with a mean of 94 seconds and  a standard…

A: The provided information is  µ=94 σ=6 P(-a<X<a)=0.40…

Q: suppose data set A has a mean of 12 and a standard deviation of 2.5  Data set B has a mean of 12…

A: The formula for coefficient of variation is, CV = (s/ x̅ ) × 100%, where s is the sample standard…

Q: If the average weight for cats is 12 pounds and the standard deviation is 2 pounds. 68 percent of…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer one question at a…

Q: The distribution of the weights of dogs at a local rescue shelter is Normal, with a mean of 38…

A:

Q: A class has a average height of 68 inches and a standard deviation of 2 inches. What percent of the…

A: Let x be the height which follows normal distribution with mean 68, and standard deviation 2. The…

Q: A class has an average height of 68 inches and a standard deviation of 2 inches. Find each value,…

A: For the given data Mean μ = 68 inchesStandard deviation σ = 2 inches

Q: The average price of an instrument at a small music store is $345. The standard deviation of the…

A:

Q: Do you agree that the standard deviation can measure variable relationships? Explain

A: The term standard deviation was introduced by karl pearsons in 1893. It is one of the most commonly…

Q: The mean score and the standard deviation in the Statistics test are respectively equal to 80 and…

A: Normal distribution is a continuous distribution which has many real life applications. Normal curve…

Q: Students at Roseville High School took an IQ test with a mean of 100 and a standard deviation of 15.…

A: GivenMean(μ)=100standard deviation(σ)=15

Q: The mean of a test score was 21.2 and the standard deviation was 5.1 . Identify the rest scores that…

A: Given Data Mean µ= 21.2. Standard Deviation σ= 5.1. Assuming that the given data is obtained from a…

Q: Suppose the exam average in a class is 82% with a standard deviation of 2. What proportion of…

A:

Q: If the standard deviation of a data is 14.50 and if each value of the data is decreased by 5, then…

A: Given : Old standard deviation = 14.50

Q: The arithmetic mean and the standard deviation of a set of 9 items are 43 and 5 respectively . If an…

A:

Q: If the average weight for cats is 12 pounds and the standard deviation is 2 pounds. 68 percent of…

A: Given, mean = 12 standard deviation = 2 Need to find the area of the Normal curve covering 68% of…

Q: If the mean height of bonsai trees is 42 cm and 95% of the trees are between 12cm and 72cm. The…

A:

Q: The mean height of women is 62 inches with standard deviation of 4 inches. What percent of women are…

A: From the given information, Mean height (µ) = 62 inches Standard deviation (σ)= 4 inches Thus, the…

Q: The mean height of women is 62 inches with standard deviation of 4 inches. What percent of women are…

A: If a random variable x has a distribution with mean µ and standard deviation σ, then the z-score is…

Q: The data in a data set are normally distributed with a mean of 190 and a standard deviation of 30.…

A: ∗Mean μ=190    standard  deviation σ=30    X~N 190,30 we need to find,   PX<130+PX>250=P…

Q: The average weight of a chicken egg is 57 grams with a standard deviation of 5.1 grams. What is the…

A: According to central limit theorem, for large sample (>30) or if the population follows normal…

Q: A distribution has standard deviation of 41.9 and mean of 74. What is the coefficient of variation?

A: Given standard deviation=41.9 mean=74

Q: The variance of a sample of 81 observations is equal to  64, what is  the standard deviation?

A: We have to find standard deviation

Q: For a set of data, μ = 71, X=35, z = -0.60. What is the standard deviation of the population?

A: Given that.   X~N( μ , ?^2 )   μ=71   , ?=?  , X=35 , z=-0.60   Z-score =( x - μ )/?

Q: The data in a data set are normally distributed with a mean of 190 and a standard deviation of 20.…

A: Given information Mean µ = 190 Standard deviation σ = 20

Q: The mean price of the fish in a pet shop is $2.93, and the standard deviation of the price is $0.59.…

A:

Q: A data set has a mean of 40 and standard deviation of 8. -2 standard deviation =  -1 standard…

A: It is given that the mean is 40 and the standard deviation is 8.

Q: A group of patients has a mean height of 160 cm and a standard deviation of 10 cm. What standard…

A: Determine the standard score that would cut off the lowest 50% of scores. The standard score that…

Q: Scientists find that a particular species of caterpillar has a mean mass of 32 grams with a standard…

A:

Q: Do you agree that standard deviation can measure variable relationships?

A: Yes, Standard deviation can measure variable relationships.

Q: Who has the larger dog relative to their breed?

A: It is given that For Golden Retriever, X = 70.2, mean = 67 and SD = 2.5 For St Bernard, X = 215,…

Q: Person A scores 78 on an exam that has a mean of 70 and a standard deviation of 5. Person B scores…

A: Given that.   X~N( μ , ?^2 )   Z-score =( x - μ )/?

Q: The mean of 200 items is 48 and their Standard Deviation is 3. Find : The sum of all the items, (ii)…

A:

Q: If the mean snowfall for Ottawa Ontario Canada is 98 inches per year and the standard deviation is…

A: Given,mean(μ)=98standard deviation(σ)=25

Q: A standardized memory test has a mean of μ = 100 and a standard deviation of σ= 10. What percent of…

A: Let X be the score in the memory test which follows normal distribution with mean 100 and standard…

Q: If the mean of the data is 130 with a standard deviation of 10, what percent of the data falls…

A: Given μ=130 and σ=10 Consider the probability that the data falls between the values 100 and 160 is,…

Q: The mean score on the Stats exam was 75 points with a standard deviation of 5 points, and Gregor’s…

A: The mean score on the Stats exam was 75 points with a standard deviation of 5 points, and Gregor’s…

Q: The data in a data set are normally distributed with a mean of 150 and a standard deviation of 30.…

A: In this problem, we are going to using The empirical rule(68-95-99.7 Rule)

Q: A doctor in the oncology department of a hospital surveyed the breathing rate of cancer patients.…

A:

Q: Students at Roseville High School took an IQ test with a mean of 100 and a standard deviation of 15.…

A: As per our guidelines we are suppose to answer only one question1)GivenMean(μ)=100standard…