For a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of 520 and a standard deviation of 180 . The grading process of this year's exam has just begun. The average score of the 35 exams graded so far is 528 . What is the probability that a sample of 35 exams will have a mean score of 528 or more if the exam scores follow the same distribution as in the past?

Q: When Morgan runs the 400 meter dash, her finishing times are normally distributed with a mean of 81…

A: From the information, given thatLet X denotes the finishing times which follows normal distribution…

Q: Janice measures the circumferences of the trunks of trees in the woods near her house for a science…

A: The mean is 72 inches and the standard deviation is 5 inches.

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

A: Given,mean(μ)=$70,000Standard deviation(σ)=$5300Ryan's starting salary(X)=$72,000

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: A statistics professor gave a final exam to a class of 30 students. The exam scores are normally…

A: Given,mean(μ)=75standard deviation(σ)=10

Q: expected number of students who read the book online.

A: Students purchased hard copy =P(H) = 60% =0.60 Students print out from the web =P(W)= 25% = 0.25…

Q: The National Sleep Foundation surveyed representative samples of adults in six different countries…

A: we have given that  n1=250 ,n2=250 ,xbar1=391 ,xbar2=426 ,s1=20 ,s2=44 alpha=0.05

Q: The test scores in a class are normally distributed with a mean score of 77. if the standard…

A: The distribution of test score are normally distributed with mean of 77. Now consider the standard…

Q: 95% of 80 freshman history students scored between 70% and 80% on a take home quiz. If this data is…

A: Given,  n=80 α= (1-0.95) =0.05 Let X denote the score of freshmen. As per t-distribution table, the…

Q: Russell is doing some research before buying his first house. He is looking at two different areas…

A:

Q: A successful basketball player has a height of 6 feet 8 ​inches, or 203 cm. Based on statistics from…

A: Consider X is a random variable defined as the height of a successful basketball player.The provided…

Q: The results of a common standardized test used in psychology research is designed so that the…

A:

Q: What is the probability that your score on an exam will be less than a 60, if the mean on the exam…

A: We have to find probability that your score on an exam will be less than a 60....

Q: What is the z-score for this raw score?

A: Let ,  Our aim is to find the Z-score .

Q: A flu test shows that about 31% of 90 patients visited hospital in the first week of January had…

A: Given that  n = 90 , p = 31% = 0.31 , q = 1 - p = 1 - 0.31 = 0.69 X ~ Binomial (n = 90 , p = 0.31) X…

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

A: Given data,Mean μ=49sd σ=20.7z-score =2Test score X=?

Q: The summary data from study demonstrates a stronger relationship between how many minutes per day a…

A: Given : A standard deviation is a measure of how dispersed the data is in relation to the mean. Low…

Q: The following is a list of z-scores for two different IQ tests. The table on the LEFT is for an IQ…

A: Given that, The random variable X is the score of the IQ test. It is normally distributed.…

Q: A researcher showed the mean of weights of college football players to be 200 pounds with a standard…

A:

Q: The average score of all golfers for a particular course has a mean of 76 and a standard deviation…

A: We have given information with the usual notation, Let X denote the score of golfers for a…

Q: For a standardized psychology examination intended for a psychology. Major is the historical data…

A: sample size(n)=35mean(μ)=510standard deviation(σ)=170

Q: r a standardized psychology examination intended for psychology majors, the historical data show…

A: Given: The corresponding z score can be calculated as: The distribution will be normal as the…

Q: Suppose a professor wants to know if students in her statistics class have a good grasp of basic…

A: Given: Sample size n=6 Sample mean x¯=∑i=1nXin=62+92+75+68+83+956=79.167 Sample standard deviation…

Q: In 2009, it was estimated that 63% of Americans supported the death penalty. In 2014, a Rasmussen…

A: sample size(n)=943 No. of Americans supported the death penalty(x)=536 population proportion=0.63

Q: The average number of pounds of red meat a person consumes each year is 196 with a standard…

A: We are given,μ = 196σ = 22n = 60

Q: On Bob's last history test, he had a score of 92.  Bob's z-score was -0.5, and the test's standard…

A: Solution -Given that Score in History test be X=92 Z- Score=-0.50 Standard deviation= 6 Find mean…

Q: Suppose the probability a patient will recover from a disease following medication is 0.7. In a…

A: Given : the probability a patient will recover from a disease following medication is 0.7.  In a…

Q: Assume a standardized IQ test exists that possesses a normal distribution and has a mean score of…

A: Answer:- Given, Assume a standardized IQ test exists that possesses a normal distribution and has a…

Q: A final exam in science 160 has a mean of 73 with a standard deviation of 7.8. If 25 students are…

A: Given information- Population mean, µ = 73 Population standard deviation, σ = 7.8 Sample size, n =…

Q: Gülce spends 8 hours for Roblox per day. If the probability of spending less than 6 hours in a…

A:

Q: A final exam in Science 150  has a mean of 80 with a standard deviation of 8. If 25 students are…

A: Given: μ = 80 σ = 8 n = 25

Q: The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures the…

A: Mean = 118.3 Sd =25 N= 25 Hypothesis test Ho :μ = 110Ha:μ > 110

Q: A researcher predicts that showing a certain film will change people’s attitudes toward alcohol. The…

A: The mean score of the experiment for 36 people is 70. In general the mean score of the people on the…

Q: A football coach claims that the average weight of all the opposing teams’ members is 210 pounds.…

A: Consider that μ is the true average weight of all the opposing teams’ members.

Q: The owner of a computer repair shop has determined that their daily revenue has mean $7200 and…

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 owner of a computer repair shop has determined that their daily revenue has mean $7200 and…

A: Mean = 7200 Standard deviation = 1200 Sample size = 30

Q: The results of a common standardized test used in psychology research is designed so that the…

A: Given Population mean = 140 Population standard deviation = 40 Score =X= 44

Q: A professor using an open-source introductory statistics book predicts that 60% of the students will…

A: given data, 60% - student will purchase a hard copy of the book,25%- will print it out from the…

Q: What is the z-score for this raw score?

A:

Q: CAN SOMEONE HELP ME SOLVE THIS WORD PROBLEM?

A: It was stated that for a standardized psychology examination intended for psychology majors, the…

Q: A recent study found that 69% of all adults over 50 wear sunglasses for driving. In a random sample…

A: Formula : Mean = np Standard Deviation  :

Q: The average person uses 130 gallons of water daily. If the standard deviation is 35 gallons , find…

A: Given that, Mean = 130 Standard deviation = 35 Sample size = 25

Q: A professor knows that her statistics students' final exam scores have a mean of 79 and a standard…

A:

Q: In a survey, 80% of the voters support a particular referendum.  If 30 voters are chosen, find the…

A: Number of voters(n)=30∵80% of the voters support a particular referendum i..e. p=0.80

Q: According to the U.S. Census, the average adult woman is the United States is 65 inches tall and the…

A: Given X is normal Distributed with mean µ = 65.0 and standard deviation σ = 3.0 Need to find Z score…

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.