A set of data items is normally distributed with a mean of 150 and a standard deviation of 20. Convert 130 to a​ z-score.   z130=_______

Q: 29. The standard deviation of a variable is 15. If a sample of 100 individuals is selected, what…

A: Since you have posted more than one question, we are answering the first question as per our rule.…

Q: 42% of elderly people have high blood pressure. If a sample of 200 is taken and a success is…

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Q: 12. Despite its nutritional value, seafood is only a tiny part of the American diet, with the…

A: For the defined sample size (i.e., number of Americans included in the sample) of n, the z-score for…

Q: Classify as true or false A. A population has mean of 15 and a standard deviation of 12. Samples of…

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Q: 1. A psychology exam has 300 questions with each question worth 1 point. Assume that the…

A: Given information: Let X be the grades in a psychology exam. Then X is a random variable from Normal…

Q: 1. Records show that the performance of male college students in Mathematics in terms of final grade…

A: We have given that  Sample sizes n1=44      , n2=36        Sample means X̄1=93.45      , X̄2=87.42…

Q: 14. A national magazine claims that the average college student watches less television that general…

A: Given that  Claim :  The average college student watches less television that general public. The…

Q: A teacher says that the top 9​% of the class received an A on the last test. The scores were…

A: Given that the mean is 67 and the standard deviation is 18. That is, μ=67, σ=18 A teacher says that…

Q: could you answer 4,5&6 please

A: Standard normal distribution: The standard normal distribution is a special case of the normal…

Q: A company's mean salary is $65,000 with a standard deviation of $6,000. If a sample of 40 employees…

A: GivenMean(x)=65000standard deviation(s)=6000sample size(n)=40

Q: The average salary for bank managers in a certain city is $91,900 pesos per hour with a standard…

A: Let random varible X be the average salary for bank managers.given,  mean(μ)=91900$…

Q: The mean life of a battery is 50 hours with a standard deviation of 6 hours. The manufacturer…

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Q: 18. The time it takes for Grade 11 students in a certain school to complete a physical fitness test…

A: Normal distribution is a continuous distribution that has many real-life applications. The standard…

Q: Claim: The mean pulse rate ( in beats per minute) of adult males is equal to 69 BPM. For a random…

A: From the provided information, Sample size (n) = 129 Sample mean (x̄) = 70.3 Sample standard…

Q: The mean annual income for people in a certain city (in thousands of dollars) is 42, with a standard…

A: The formula for mean of the Z-score is, Z=x¯-μσn Here n is the sample size, μ is the population mean…

Q: A sample of university students has an average GPA of 2.78 with a standard deviation of 0.45. If GPA…

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Q: 1. Records show that the performance of male college students in Mathematics in terms of final grade…

A: In the given scenario, the final grades of students were compared. The average final grades of the…

Q: 5. The fully-grown green iguana is about 14.2 inches in length on average, with a standard deviation…

A: Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: Let x represent the dollar amount spent on supermarket impulse buying in a 10-minute (unplanned)…

A: Given Information:  Let x represent the dollar amount spent on supermarket impulse buying in a…

Q: A food company sells salmon to various customers. The mean weight of the salmon is 45 lb with a…

A: Central limit theorem: The central limit theorem state that the sampling distribution of the sample…

Q: 5. A set of final exam scores has a mean of 53 and a standard deviation of 6. The scores are…

A: Note : - As per our policy we can answer only one question at a time, please make a new requests for…

Q: A psychologist finds that the intelligence quotients (IQ) of a group of patients are normally…

A: A psychologist finds that the intelligence quotients (IQ) of a group of patients are normally…

Q: The SAT Verbal scores of a sample of 300 students at a particular university had a mean of 592 and…

A: Statistic is a measure which is based on sample values And parameter is a measure which is based on…

Q: rubbish waste disposal facility that is overloaded if its 4703 households discard waste with weights…

A:

Q: Claim: The mean pulse rate​ (in beats per​ minute) of adult males is equal to 69 bpm. For a random…

A: Given data, n=139 mean=68.2 s.d=10.7 test statistic=?

Q: A university restricts its admission to students whose SAT scores are in the top 6% of all scores.…

A: Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: A farmer has found that the length of string beans he grows follows a normal distribution, having a…

A: Given that :- Mean μ=12 Standard deviation σ=1.17 Find out the percentages of the crop cannot be…

Q: 22. A six-year study in a certain country found that birth weights of newborns were normally…

A: Let, X: The weight of a newborn in grams. Given: Mean = μ= 3758 Standard deviation = σ = 496 And X…

Q: The mean weight of a baby hamsters is 8 ounces with a standard deviation of 2 ounces. Use the…

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Q: 3. The heart rate for a group of patients at a local hospital is normally distributed with a mean of…

A: Given that mu = 97,s.d=18

Q: 5. High school textbooks don't last forever. The lifespan of all high school textbooks is…

A: Given that: Mean, μ=9 years Population standard deviation, σ=2.5 years

Q: Temperatures in June in the Paradise City are distributed nearly normally with mean 80 degrees and…

A: Solution: Let X be the temperatures in June in the paradise city. From the given information, X…

Q: 46. Two hundred eighty (280) incoming freshmen at a certain college were given IQ tests. Assuming…

A: Let X denote the IQs  and it follows normal distribution with a mean of μ=100 and a standard…

Q: 4) The mean yield of com in the United States is about 120 bushels per acre. A survey of 50 farmers…

A: We have, X= Yield of com in United States n= sample size = 50 X-  = sample mean = 121.2 bushels per…

Q: 7. The Floppy Disk Company makes 3.5 inch floppy disks for disk drives that are 3.7 inches wide. The…

A: Given probability is P(Z>z)=0.2981

Q: births  per woman was greater than 0.75. They asked 50 women across China the number of  births they…

A:

Q: Mike thinks that there is a difference in quality of life between rural and urban living. He…

A: Since, you have just asked the value of degree of freedom, the answer is provided below:     The…

Q: 29. The standard deviation of a variable is 15. If a sample of 100 individuals is selected, what…

A: The complete solutions are given below

Q: Six different second-year medical students at Bellevue Hospital measured the blood pressure of the…

A:

Q: The heights of a pediatricians three-year-old females are approximately normally distributed, with…

A: Solution: Let X be the height of a pediatricians three-year-old females. From the given information,…

Q: The SAT scores of students are normally distributed with a mean of 950 and a standard deviation of…

A: Given X is normal Distributed with mean µ = 950.0 and standard deviation σ = 200.0 now will using…

Q: 2. In medical mission among adults, the distribution of cholesterol readings, in mg/dl is normally…

A: Given that mu =210 ,sigma =12

Q: 5. In general mathematics examination, students got an average of 82 and the standard deviation of…

A: 5) Given: Mean μ=82 Standard deviation σ=7 10 students got scores between 78 to 86.

Q: A set of data items is normally distributed with a mean of 30and a standard deviation of 8. Convert…

A: Given:   μ = 30    σ = 8

Q: The heights of American adult males are normally distributed with a mean of 177 cm and a standard…

A:

Q: A researcher believes that the mean age of medical doctors in a large hospital system is older than…

A: Given data ,μ=46x=48.6σ=4.2n=30∝=0.5

Q: An experiment compares weight of fish for two different brands fish food. Nacho Average Minosfish…

A: Given information: μAverage=10, σAverage=1.5μImpossible=12, σImpossible=1.0

Q: A local hospital doctor's team reports that the average cost of treatment of heart disease is 800…

A:

Q: 21. The mean number of gallons of gasoline pumped per customer at Ray's Marathon Station is 9.5…

A: 21. It is been asked to calculate the proportion of data within specified values using Chebyshev…

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.