If only the upper 30% of a normally distributed class passed a quiz for which the mean was 70 and the standard deviation was 10, what was the lowest score a student could have recieved and still have passed?

Q: Would a person spending $476 on their car be considered usual or unusual if the amount spent by the…

A: Given information- Population mean µ = $347 Population standard deviation, σ = $39.58 Let, X be the…

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: 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: Anyone who plays or watches sports has heard of the "home field advantage." Teams tend to win more…

A: Given Information: Sample size n=2431 Number of successes x=1319 Hypothesized value of population…

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: 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: If you have 100 people in your sample, what would be the degrees of freedom you use to calculate the…

A: Given, n=100 Degree of freedom(df)=?

Q: Suppose we have data on the ages of U.S. presidents. We also have ages for a sample of high school…

A:

Q: In a normally distributed data set with a mean of 24 and a standard deviation of 4.2, what…

A:

Q: On a nationwide math test, the mean was 57 and the standard deviation was 10. If Roberto scored 80,…

A:

Q: 6. Jared has a mean of 74 on his quizzes, with a standard deviation of 7. On his most recent quiz,…

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

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

A: Solution

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

A:

Q: An advertising agency has stated that 20% of all television viewers watch a particular program. How…

A: From the provided information, An advertising agency has stated that 20% of all television viewers…

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: statistics professor reported that the mean score in a recent quiz is 72 and the standard deviation…

A: Solution

Q: A marketing company wants to compare the effectiveness of two different advertising campaigns. They…

A: The null hypothesis is that there is no significant difference in the mean purchase amount between…

Q: Suppose​ 18% of​ movie-goers say that horror is their favorite movie genre. If a random sample of…

A: Obtain the mean number of movie-goers that prefer horror movie genre. The mean number of movie-goers…

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

A: Note: Hi there! Thank you for posting the question. To avoid the Plagiarism issue we have used the…

Q: Suppose you read in the newspaper that registered nurses earned an average annual salary of $49,110…

A: Claim :  salary was significantly lower than the $49,110.

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: 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: In a study of Ridge View's boys' basketball team, the average height is 68 inches and standard…

A: Given, mean =μ=68Standard deviation = 4x = 78

Q: Janai and Aaliyah began arguing about who did better on their tests, but the decide who did better…

A: GivenJanai earned in Math is 76.5 Aaliyah earned in social studies = 70.2For…

Q: On a nationwide math test, the mean was 72 and the standard deviation was 7. If Roberto scored 90,…

A: Given that, Mean = 72 Standard deviation = 7

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

A: we have given that We need to construct the 95\%95% confidence interval for the difference between…

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: Salomé and Latasha began arguing about who did better on their tests, but they couldn't decide who…

A: Salome's test grade: Mean = 73.7 , Standard deviation = 10 Social studies = 80.8 Latasha's test…

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

A: To find the z-score of Lamar's starting salary relative to the starting salaries of all entry-level…

Q: In a normally distributed data set a mean of 55 where 95% of the data fall between 47.4 and 62.6,…

A:

Q: The mean composite score for seniors who took the SAT in 2010 was 1068. If the standard deviation…

A: From the provided information, Mean (µ) = 1068 Standard deviation (σ) = 100

Q: Suppose 36% of movie goers say comedy is their favorite genre. If a random sample of 120 movie goers…

A: Obtain the mean number of movie goers that prefer comedy. The mean number of movie goers that prefer…

Q: One year Perry had the lowest ERA (earned-run average, mean number of runs yielded per nine innings…

A: Perry had the lowest ERA​ (earned-run average, mean number of runs yielded per nine innings​…

Q: A student takes a test in his math course and scores 45 points and a test in his psychology…

A: Introduction:Consider X as a normally distributed random variable, with mean μ and standard…

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

A: normally distributed with a mean of  500μ=500 standard deviation of  100σ=100we have to find out…

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…