A standard I.Q. test produces normally distributec 13 with a mean of 104 and a standard deviation of 16 for 52 000 students in grade 12 in the province. Approximatel how many of these students would have I.Q.s above 140? A 317 B 624 C 650 D 51 366

Q: Assume that scores on a trivia challenge test were distributed normally, with an average score of 70…

A: Given data, μ=70σ=6

Q: Both sets of values have an average of 13. Is Set A's standard deviation smaller, larger, or about…

A: Given : Set A: 1 2 3 23 24 25 Set B: 9 10 11 14 16 18 Both sets of values have an average of 13

Q: Both sets of values have an average of 13. Is Set A's standard deviation smaller, larger, or about…

A: Given information- Average for both sets is (X-bar) = 13 To know which set has larger standard…

Q: For 5 year old children, the mean weight is 51.01 pounds with a standard deviation of 3.98 pounds.…

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: The average cost of tuition, room and board at small private liberal arts colleges is reported to be…

A: We have to find test statistics...

Q: Calculate the standard deviation of the data shown, to two decimal places 16.1 18.5 19.3 14.4 3.9…

A:

Q: Which of the following is the correct formula for the margin of error of a population mean where the…

A: Margin of error: A margin of error is a statistical measurement for the diff. between actual and…

Q: Suppose a population of individuals has a mean weight of 160 pounds, with a population standard…

A: Solution: Let X be the weight of individuals. From the given information, X follows normal…

Q: Given the weekly grocery bills of 10 customers. If the variance of the grocery bill is (16844.72),…

A: The variance of a sample isσ2=∑i=1nxi-x2n-1 And the standard deviation isσ=σ2

Q: The length of pregnancies are normally distributed with a mean of 266 days and a standard deviation…

A: Assume a random variable X, that defines the length of pregnancies.

Q: Which of the following values for the population standard deviation would cause a score located…

A: Higher the standard deviation more will be the spread of the data. And the point will be farther…

Q: A new extended-life light bulb has an average life of 750 hours, with a standard deviation of 50…

A: As per empirical rule approximately 68-95-99.74% data fall within 1-2and3sd of mean.

Q: In a recent study, the serum cholesterol levels in men were found to be normally distributed with a…

A:

Q: The standard deviation of a variable is 15. If a sample of 100 individuals is selected, what size is…

A:

Q: Find the following z scores with a mean of 20 and a standard deviation of 5. a. 20 b. 32 c. 28 d. 25

A: Note :Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question…

Q: The height of adult men in the United States is normally distributed with a mean of 70 inches and a…

A: Z = -0.67 Mu = 70 S = 3

Q: Given IQ scores are approximately normally distributed with a mean of 100 and standard deviation of…

A: We have, the population mean, μ=100                the standard deviation, σ=15 Let X=IQ score

Q: On a standardized test with a normal distribution, the me was 64.3 and the standard deviation was…

A: We have given that  The scores follow the normal distribution with mean 64.3 and standard deviation…

Q: "The weights of 1,000 children, in average, is 64kg with standard deviation of 18kg. Suppose the…

A: Given that n=1000, mu =64 ,s.d =18 ,p(x<59 ) =?

Q: Suppose the test scores of 600 students are normally distributed with a mean of 76 and standard…

A:

Q: Given IQ scores are approximately normally distributed with a mean of 100 and standard deviation of…

A: Given IQ scores are approximately normally distributed with a mean of 100 and standard deviation of…

Q: A pharmacologist measured the concentration of dopamine in the brains of several rats.The mean…

A: Mean = 1269 Standard deviation = 145

Q: The scores on a driver's test are normally distributed with a mean of 100. Find the score that is 3…

A: From the provided information, Mean (µ) = 100 Standard deviation (σ) = 28 X~N (100, 28)

Q: If the weights of newborn babies are normally distributed with a mean of 2950 grams and a standard…

A: Given, X~Nμ,σ  where μ=2950 grams    and σ=340 gramsfind P(x<2610)=?

Q: The IQs of applicants to a certain college are approximately normally distributed with a mean of 112…

A:

Q: Given IQ scores are approximately normally distributed with a mean of 100 and  standard deviation of…

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

Q: The following are that scores of 20 students who took a calculus exam. Find the mean and standard…

A:

Q: For a population with mean of 50 and standard deviation of 8, what is the raw score that corresponds…

A:

Q: On a construction site, the amount of dirt scooped by a forklift machine is normally distributed…

A:

Q: A normally distributed data set has a mean of 0 and a standard deviation of 2. Which of the…

A: Let X be the random variable from normal distribution with mean (μ) = 0 and standard deviation (σ) =…

Q: If a student scored 77 points on a test where the mean score was 84.5 and the standard deviation was…

A: Solution: Let X be the score of a student. From the given information, X has a mean µ=84.5 and a…

Q: Given that the mean weight of senior high school students is 65kg with a standard deviation of 10kg.…

A:

Q: Calculate the standard deviation of the data shown, to two decimal places 6.3 28.2 24.9 23.7 5.7 2.7…

A:

Q: The starting salaries of individuals with an MBA degree are normally distributed with a mean of…

A: Given information- Population mean, µ = $40,000 Population standard deviation, σ = $5,000 We have to…

Q: Find the following z scores with a mean of 25 and a standard deviation of 4. a. 20 b. 32 c. 28…

A:

Q: For a population with mean of 50 and standard deviation of 8, what is the raw score that corresponds…

A: In question, Given that mu=50, Sigma= 8 and z score = -0.50 Then we'll find the value of raw score.…

Q: If the mean height of bonsai trees is 52 cm with a standard deviation of 10 cm, what percent of the…

A:

Q: For a population with mean of 50 and standard deviation of 8, what is the raw score that corresponds…

A:

Q: The variance of a sample of 81 observations equals 64. The standard deviation of the sample equals?…

A:

Q: A sample of 10 networking sites for a specific month has a mean of 26.1 and a standard deviation of…

A: We have given , Mean = 26.1 and  standard deviation = 4.2, And Sample size = 10 . We have to find…

Q: The IQs of applicants to a certain college are approximately normally distributed with a mean of 112…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: A nurse at a local hospital is interested in estimating the birth weight of infants. How large a…

A:

Q: For a population with mean of 50 and standard deviation of 8, what is the raw score that corresponds…

A: GivenMean(μ)=50standard deviation(σ)=8z=2.50

Q: The standard deviation of a variable is 15. If a sample of 100 individuals is selected, what size…

A: The standard error of mean is, SE = σ/√n, where σ is the standard deviation and n is the sample…

Q: The average score on a test of 40 students has a mean score of 53 and a standard deviation of 6. At…

A: Answer - The average score on a test of n = 40 Student has a mean score μ = 53  and σ = 6…

Q: Which of the following is the correct formula for the margin of error of a population mean where the…

A: Introduction: It is required to identify the margin of error of a population mean for unknown…

Q: The three data sets have the same mean and range, but is the variation the same? Prove your answer…

A: For all the parts, it is given that, x=5+7+9+11+13+15+177=777=11

Q: A nurse at a local hospital is interested in estimating the birth weight of infants. How large a…

A: The following information has been provided: α=0.02,E=4,σ=5\alpha = 0.02, E = 4, \sigma = 5…

Q: For a social club, the members had a mean age of 68 and a standard deviation of 10 years. What is…

A: We have given that  The member had a mean age of 68 years and standard deviation 10 years.

Q: on a nal mathematics assessment test has a mean score of 281. This test result prompts a state…

A: The given claim is that the mean score for the states eighth grades on their exam is more than 275.

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.