A company responsible for making gumballs found that their gumballs had an average diameter of 2.21 cm and a standard deviation of 0.01 cm. What is the percentage of gumballs that are within t1 standard deviations of the mean?

Q: A health care prifessional wishes to estimate the birth weights of infants. How large a sample must…

A: Given Information :  A health care professional wishes to estimate the birth weights of infants. He…

Q: On a standardized test, scores are normally distributed with a mean of 400 and a standard deviation…

A: Given data,μ=400σ=80P(X<x)=80%=0.80x=?

Q: On a standardized test with normal distribution, the mean is 85 and the standard deviation is 3.…

A: If 95% lies in the middle then (100-95)%=5% are on the two tails. So one tail has = 5%2=2.5%=0.025z…

Q: For normally distributed variables, approximately what percentage of values fall within two standard…

A: Given a normally distributed variable X. Let us assume its mean is µ and standard deviation…

Q: In a county male height is normally distributed with a mean of 175 cm and a standard deviation of 6…

A:

Q: What is the standard deviation of y?

A:

Q: The depth of the snow in my yard is normally distributed, with a mean of 2.5 inches and a standard…

A: It is given that the depth of the snow follows a normal distribution with mean 2.5 inches and…

Q: The heights of men, in centimetres, are normally distributed with a mean of 175 and a standard…

A:

Q: The number of minutes spent reading in one day is normally distributed with a mean of μ = 23 and a…

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

Q: Calculate variançe and standard deviation from the given data,

A:

Q: At a local high school, GPA's are normally distributed with a mean of 2.9 and standard deviation of…

A: Given problem Given that   At a local high school, GPA's are normally distributed with a mean of…

Q: If the dispersion is small the, the standard deviation is........?

A:

Q: Can you find the mean and the standard deviation with this data?

A: Given: Data on Index finger length for female. Step-by-step procedure to obtain the mean and the…

Q: At my work there is a fancy coffee machine that dispenses 120 ml of coffee, but I believe that the…

A: Given data and calculation for sample standard deviation is shown below Hypothesized mean = 120 ml…

Q: The chickens at Colonel Thompson's Ranch have a mean weight of 1850 g, with a standard deviation of…

A:

Q: A particular leg bone for dinosaur fossils has a mean length of 5 feet with a standard deviation of…

A: Given, A particular leg bone for dinosaur fossils has a mean length of 5 feet with a standard…

Q: The length of time it takes a Grade 11 student to play the Candy Crush computer app follows a normal…

A: Given that  The length of time it takes a grade 11student to play the candy crush computer is…

Q: On a standardized exam, the scores are normally distributed with a mean of 35 and a standard…

A:

Q: The mean speed of a sample of vehicles along a stretch of highway is 64 miles per​ hour, with a…

A: Given, μ=64σ=4P(52<X<76)=?

Q: The results of a recent survey indicate that the average new car costs $23,000, with a standard…

A: It is given that the mean new car cost is $23,000 with a standard deviation of $3,500.

Q: The United States Forest Service is interested in determining the percentage of acreage in Yosemite…

A:

Q: A normal distribution has a mean of 60 and a standard deviation of 20. Barbara's score is 40. What…

A: It is given that the Normal distribution has a mean 60 and a standard deviation of 20.  Suppose X be…

Q: For a sample of raw scores, you calculate a mean of 15.25 and a standard deviation of 3.19. What is…

A: Introduction:Suppose a random variable, X has sample mean, x̅ and sample standard deviation, s.For a…

Q: An instructor in a large lecture class found, at the end of the semester, that the total point…

A: The provided information is:

Q: Suppose there is a city where the mean cost per month of a one-bedroom apartment is $1,500, with a…

A: Given: Meanμ=1500Standard deviationσ=250

Q: The heights of American men are normally distributed with a mean of 65.3 inches and a standard…

A: We have given that  Mean(µ) = 65.3Standard deviations (σ) = 2.6X ~ N (µ, σ )= N(65.3, 2.6) z-score…

Q: . A hat company found women had a mean head circumference of 57.46 cm and a standard deviation of…

A: According to empirical rule 95% of the data lie within 2 standard deviation and approximately 99.7%…

Q: In 1970, adults who were 18 years or more had a mean systolic blood pressure (SBP) of 148 mm Hg.,…

A: Given that in 1970 adults who were 18 years or more had a mean systolic blood pressure (SBP) of 148…

Q: A department store has daily mean sales of $ 28,372.72. The standard deviation of sales is $2000. On…

A: Given information- Mean sales, μ = $ 28,372.72 Population standard deviation, σ = $2000 Tuesday’s…

Q: The heights of American men are normally distributed with a mean of 65.3 inches and a standard…

A: Let X denotes the heights of American men. Given that X~Nμ=65.3,σ2=2.62. Let Z=X-65.32.6, then…

Q: The Atlanta Braves baseball team has a mean batting average of 250 with a standard deviation of 20.…

A:

Q: If a regulation basketball is 12 PSI (pounds of force per square inch of area) with a standard…

A: Percentile : Percentile is the number such that certain percentage of data fall below that value.…

Q: The fastballs follow a Normal distribution with mean μ = 92 mph and a standard deviation of σ = 2…

A:

Q: the average height on the soccer team is 66 inches with a standard deviation of 3. a z score of -1.6…

A: Introduction: Consider X as a normally distributed random variable, with mean μ and standard…

Q: At a college, the mean height of women is 63 inches with the standard deviation of 3 inches. What is…

A: Given,mean(μ)=63standard deviation(σ)=3

Q: The height of men in the United states fits with a normal distribution with a mean of 70 inches and…

A:

Q: On an exam, Tom scored 8 points above the mean and had a z-score of +2.00. The standard deviation…

A: Given: z-score=2 Score above the mean=8

Q: A standardized test has a mean of 50 and a standard deviation of 4. Which of the following is the…

A: The normal distribution  in the center are generally denser and basically less denser at tails.…

Q: On a standardized exam, the scores are normally distributed with a mean of 170 and a standard…

A: We have to find z score..

Q: Determine the mean and the standard deviation.

A: We have Given a binomial Distribution that is our random variable X~b(n,p) with parameter n=50,…

Q: The inspection division of the Lee County Weights and Measures Department is interested in…

A:

Q: When samples of size 30 are collected from a normal population that has a mean of 200 and a standard…

A:

Q: An analyst found that the average amount of money in bank accounts at his/her bank is $2,000 with a…

A:

Q: The finished inside diameter of a piston ring is normally distributed with a mean of 10 cm and a…

A: The mean of the diameter of the piston ring is 10 cm. The standard deviation of the piston ring is…

Q: Suppose there is a city where the mean cost per month of a one-bedroor apartment is $1,500, with a…

A: The percentage of one bedroom apartments in the city cost between $750 and $1000 is,

Q: The weights for a baby boy is normally distributed with a mean score of 7lbs and a standard…

A: Question is incomplete. Please upload the complete question. I can do these type of questions with…

Q: When samples of size 25 are collected from a normal population that has a mean of 100 and a standard…

A: Given, n = 25 μ = 100σ = 20       To find, Sampling distribution of standard deviation?

Q: An instructor in a large lecture class found, at the end of the semester, that the total point…

A: It is given that mean and standard deviation are 530 inches and 80, respectively.

Q: In a county male height is normally distributed with a mean of 177 cm and a standard deviation of 6…

A:

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.