In a medical study, a researcher wishes to select respondents in the middle of 45% of the population based on blood pressure. If the mean systolic blood pressure is 100 and the standard deviation is 20, find the upper and lower reading that would qualify respondents to participate in the study.

Q: a successful basketball player has a height of 6 feet 9 inches, or 206 cm. Based on statistics from…

A: Given,           Z -score=4.45           A basket ball player has a height of  6 feet 9…

Q: If the average weight of pigs in PigglyWiggly, Pennsylvania is 221.4 pounds with a standard…

A: Given, If the average weight of pigs in PigglyWiggly, Pennsylvania is 221.4 pounds with a standard…

Q: The lifetime of lightbulbs has a mean of 1500 hours and a standard deviation of 100 hours. A sample…

A: Let the random variable X denote the lifetime of light bulbs. It is given that X has a mean of 1500…

Q: The year Martina graduated college, she got a job as an entry-level software engineer working for a…

A: GivenMean(μ)=57000standard deviation(σ)=3700starting salary (x)=65000

Q: Lindsey and Karen began arguing about who did better on their tests, but they couldn't decide who…

A: Lindsey (Art History) 70.7 9.4 81.1 Karen (Social Studies) 61 9.6 70.7 a) Calculate the…

Q: 00 freshmen at Arundel University took part in a math comprehension test. The scores were normally…

A: The middle (center) of the normal curve represents the mean of the curve. The normal curve is the…

Q: Malik and Landon began arguing about who did better on their tests, but they couldn't decide who did…

A: Given:   Malik (Art history) 75.1 10 71.1 Landon (Math) 66.5 9.1 71.8 Formula:

Q: The time it takes a computer repair company to diagnose a computer follows a normal distribution…

A: Given data  X = time taken for computer repair company to diagnose a computer μ=50   σ=12…

Q: A student score 83 on a Mathematics in the Modern World has a mean of 72 and a standard deviation of…

A:

Q: Jacy and Bella began arguing about who did better on their tests, but they couldn't decide who did…

A: GivenJacy took a test in Math and earned a 78.2 Bella took a test in social studies and earned a…

Q: Ojai is a weather station in the state of California and Seabrook is a weather station in the state…

A: Given information- We have given the data of noontime temperatures recorded among weather stations…

Q: A data set has a mean of 60.4 and a standard deviation of 5.2    Is a value of 45 unusual? Is a…

A: From the provided information, Mean (µ) = 60.4 Standard deviation (σ) = 5.2 X~N (60.4, 5.2)

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

A:

Q: Mary Bartel, an auditor for a large credit card company, knows that, on average, the monthly balance…

A: The standard deviation is 56. Mary audits 50 accounts. That is n=50

Q: Dougal is filling out college applications that require either a SAT math score or ACT math score.…

A: Given Information: Dougal has an SAT math score of 610 and an ACT math score of 27. Mean SAT math…

Q: The operation manager at a tire manufacturing company believes that the mean mileage of a tire is…

A: The sampling distribution of sample mean follows the normal distribution, if the population is…

Q: If family income is positively skewed in a study with a standard deviation of $18000, knowing the…

A: Given information: The distribution of family income is positively skewed. The median family income…

Q: Juwan and Salvador began arguing about who did better on their tests, but they couldn't decide who…

A: Here we need to compute the z score of Salvador and Juwan and find who performed relatively better…

Q: At a supermarket, the mean waiting time to get to the checkout counter is 5 minutes and the standard…

A:

Q: In preparation for the upcoming school year, a teacher looks at raw test scores on the statewide…

A: Let Z be the standard normally distributed random variable with mean 0 and standard deviation 1.

Q: Jone works for a Italian dramatic agency whose workers had an average income this past year of…

A:

Q: A tire company finds the lifespan for one brand of its tires is normally distributed with a mean of…

A: GivenMean(μ)=48200standard deviation(σ)=5000

Q: A mathematics professor gives two different tests to two sections of his college algebra courses.…

A: The z-score of a random variable x is defined as follows: z = (x – µ)/σ. Here, µ and σ are the…

Q: If the standard deviation of sample A  is 5 and the standard deviation of sample B  is 12, what is…

A:

Q: Kevin and Bill began arguing about who did better on their tests, but they couldn't decide who did…

A: Given information English class Bill Marks x = 66.3 Mean µ = 66.8 Standard deviation σ = 10.5 Social…

Q: In physics examination, the mean grade is 80 and the standard deviation is 5. a. Find the…

A: Solution-: Given:  Let, X- Score (grades) of examination (a) Find the corresponding z-scores of two…

Q: What type of question is this what formula is used?   Given a sample with a mean of 151 and a…

A: Given,   Mean = 151 Standard deviation = 27

Q: aking the Graduate Management Aptitude Test averaged 812 with a standard deviation of 145. Only…

A: Given: Meanμ=812Standard deviationσ=145 Consider, X be the random variable that shows the average…

Q: If a variable has a mean of 53, a median of 62, and a standard deviation of 4, What is its skewness?

A: The formula to find skewness is given below:

Q: According to the Nielsen Company the mean number of TV sets in a US household in 2013 was 2.24.…

A: Let X is the number of TV sets in US households.

Q: A nutritionist claims that the mean tuna consumption by a person is 3.6 pounds per year. A sample of…

A: Given, A nutritionist claims that the mean tuna consumption by a person is 3.6 pounds per year. A…

Q: The average teacher's salary in a particular state is  $54,194 . If the standard deviation is…

A:

Q: Taylor and Meredith began arguing about who did better on their tests, but they couldn't decide who…

A: A z-score is the standard score that determines how much the data point deviates from the population…

Q: a) Calculate the z-score for Lucas's test grade. z=z= b) Calculate the z-score for Alex's test…

A:

Q: Suppose the time people take to find a parking spot at the annual State Fair is normally distributed…

A:

Q: A manager is interested in finding the average number of sales per day at a sporting goods store. If…

A: Obtain the sample size. The sample size is obtained below as follows: The formula of sample size is,…

Q: Skye High School has a total of 500 graduates.  The mean SAT score of Skye High School graduates is…

A: Given data,μ=947σ=205P(X≥1000)=?

Q: The average drive to work is 9.6 miles. Assume the standard deviation is 1.8 miles. If a random…

A: From the given information, x¯=9.6σ=1.8n=36

Q: Suppose this average cost was based on a sample of 55 persons who had been involved in car crashes…

A:

Q: According to a study, the salaries of registered nurse are normally distributed with a mean of 56310…

A: Given,mean(μ)=56310standard deviation(σ)=5038

Q: A second species of extra-terrestrial has a mean height of 71cm and a standard deviation of 5.3cm.…

A:

Q: In preparation for the upcoming school year, a teacher looks at raw test scores on the statewide…

A:

Q: There are 500 employees in Company ABC of which the mean salary per day is Php385.00 with a standard…

A: Given: The number of employees are N=500. The mean salary per day of employees is μ=385. The…

Q: The mean IQ of 200,000 current and past University of Manitoba students has been found to be 81.9.…

A: Given: Population mean μ=81.9 Population standard deviation σ=13.1 Number of people in 2016 = 29987…

Q: The college board reports that in a recent year, the mean mathematics SAT score was 514, and the…

A:

Q: In preparation for the upcoming school year, a teacher looks at raw test scores on the statewide…

A: Formula of z score : z = x - μσ

Q: Nick and Donald began arguing about who did better on their tests, but they couldn't decide who did…

A: Givennick test grade in science is 79.6x=79.6science mean(μ)=73.8standard deviation(σ)=9.3Donald…

Q: According to a study of TV viewing habits, the average number of hours an American over the age of 2…

A: Given data,Standard deviation is σ=16If n=64 standard error of the mean(σx)=?

Q: A population has μ = 50 and σ = 5. If 10 points are added to every score in the population, what are…

A: Consider, (µ) = 50 and (σ) = 5 Let, X be the scores of the population. If 10 points are added to…

Q: A college admissions officer believes that students enrolling from Shawnee school District have…

A: Solution: Given information: n1=30 Sample size of Shawnee school Districtn2=30 Sample size of West…

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.