A dentist wants to estimate the average number of patients coming into her clinic each day. She estimates the standard deviation is 6 patients per day. If she wants to use a random sample of previous days for her sample, how many days should she include to be 95% sure her estimate is off by no more than 0.3 patients per day?

Q: After entering the test scores from her Statistics class of 25 students, the instructor calculated…

A: IQR is obtained as the difference between the third and first quartiles.

Q: For the data in the following sample: 1,1,9,1 A. Find the ss, variane, and standard deviation. B.…

A: Given data: 1,1,9,1

Q: A sample of n = 6 scores has a mean of M = 10. If one score with a value of X = 12 is removed from…

A: Given that  A sample of n = 6 scores has a mean of M = 10

Q: Carol-Anne is an environmental scientist studying the heights of red oak trees in a nearby marsh and…

A: It is given that the researcher randomly selected 10 red oak trees from each habitat and records the…

Q: Greg is in his first semester at a university and is taking a calculus course with a large…

A:

Q: A large number of applicants for admission to graduate study in business are given an aptitude test.…

A:

Q: Nationally, patients who go to the emergency room wait an average of 7 hours to be admitted into the…

A: From the provided information, Sample size (n) = 10 Sample mean (x̅) = 6.9 Sample standard deviation…

Q: Suppose you were told you scored two standard deviation below the mean on a measure where the main…

A:

Q: The distribution of heights of both five‑year old boys and seven‑year old boys is approximately…

A: The z-score for John's at age 5 is, z=x-μσ=44-431.8=11.8=0.556 Thus, the z-score for John's at age 5…

Q: Joseph has taken two tests in his chemistry class. He scored 72 on the first test, for which the…

A: GivenFor first test:-x=72Mean(μ)=65standard deviation(σ)=8For second test:-x=60Mean(μ)=45standard…

Q: Sophia's final exams have an average of 78 and a standard deviation of 6. If she wants 4% of her…

A:

Q: A population has a mean of μ = 40. If 5 points are added to each score, what is the value for the…

A: Let a population has n units,X1,X2,....,Xn.Then the total sum of the population is S=X1+X2+...+Xn.…

Q: For a random sample of  70  overweight men, the mean of the number of pounds that they were…

A: given data  n = 70 x¯ = 28 poundsσ = 3.8 poundsbest point estimate for population mean  = ?

Q: IQ is normally distributed with a mean of 100 (SD = 15). What score would a person need to be in the…

A: Let X denote the IQ scores and it follows normal distribution with mean of 100 and standard…

Q: Max scored an 80 on her psychology quiz, but the class as a whole averaged a 40. If the standard…

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Q: The director of research and development is testing a new drug. She wants to know if there is…

A: Given: Population mean (µ) = 384 minutes Sample size (n) = 79 Sample mean (x̅) = 386 minutes Level…

Q: Suppose that Jett achieves a score of 1250 on the SAT, and his sister Kate scores 29 on the ACT. The…

A: Given information- For SAT scores- Population Mean µ = 1100 Standard deviation (σ) = 250 For ACT…

Q: A sample of n = 4 scores has a mean of M = 8. If one new score with a value of X = 3 is added to the…

A: Given,No. of observations (n) = 4and mean (M) - 8we know that,Mean (M) = ∑Xii=1nn

Q: Maria made 75% on her Government test and 83% on her Algebra 2 test. The mean grade on the…

A: Given  For government  X=0.75,μ=0.72, σ=0.05 For algebra  X=0.83, μ=0.81, σ=0.04 We want to find…

Q: Jonathan, a college business student wants to study how many pages of notes fellow classmates took…

A:

Q: A large number of applicants for admission to graduate study in business are given an aptitude test.…

A: Given,Mean, μ = 460Standard deviation, σ = 80Let X be a random variable represents the score.Using…

Q: On a standardized test, Sara had a score of 93, which was exactly 2 standard deviations above the…

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

Q: Find the mean and standard deviation of the original set of data.

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Q: Brian scored an 80% on a Chemistry Exam. The average on the exam was a 68%, with a standard…

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Q: A successful basketball player has a height of 6 feet 4 ​inches, or 193 cm. Based on statistics from…

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Q: Deanna is the principal at a Midwestern middle school and wants to know the average IQ of all…

A: From the provided information, Standard deviation (σ) = 15 Confidence level = 99.5% The Z value at…

Q: Suppose a class average on a test is 75 and the standard deviation is 10. if joe scores 80 on the…

A:

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.