school principal decided to change the teacher. The last test with the previous teacher, which was written by 18 people, showed an average of 58 with deviation of 12. A month later, a new teacher conducts a similar test that is written

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

A: given data Ermias  :   μ1 = 76.7     σ1  = 10.5       x1 = 76.5Trinidad  :   μ2 = 64.5     σ2  = 8.1…

Q: The election results were announced in a country. The number of seats in state Mozi had a mean of…

A:

Q: The tallest living man at one time had a height of 261 cm. The shortest living man at that time had…

A:

Q: u and your friend have recently taken two different standardized mathematics exams. You scored 92 on…

A: The mean = 100The standard deviation = 10

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

A: Given data,For mathμ=76.8σ=9.9Kimberly score is X=76.4For Socialμ=62.6σ=9Alexis score is X=63.2

Q: K In a survey of 1395 people, 995 people said they voted in a recent presidential election. Voting…

A: Sample size (n)=1395 people 995 people said they voted  Probability of eligible voters actually=0.69…

Q: Calculate the z-score for Jacqueline's test grade. z=z= [Round your answer to two decimal places.]…

A:

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

A: the students' test grades in the Art History class had a mean of 72 and a standard deviation of 9.3,…

Q: Doug has 1,000 bottle caps in his collection compared to Melissa's 2000 bottle caps. If the average…

A: Given,mean(μ)=1250standard deviation(σ)=500Doug bottle cap collection(X)=1000Melissa's bottle cap…

Q: test in Science and earned a 66. Use the fact that all the students' test grades ad a mean of 75.9…

A: Given For Janai X=78.6 Population Mean=75.9 Population standard deviation=9.4 For Roscoe Population…

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: On the past math summative exam the bottom 20% of students failed to pass the test.the mean for the…

A:

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

A: given data  carla: math testx1 = 77.7μ1 = 71.2σ1 = 10.1patrisse : english testx2 = 68.7μ2 = 64.1σ2 =…

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

A: Given: All the student’s test grades in the English All the student’s test grades in the Society…

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

A: Consider X be a random variable which follows normal distribution indicating the score earned on a…

Q: axine and Jeremiah began arguing about who did better on their tests, but they bulant decide etter…

A: Given that.   X~N( μ , ?)   Z-score =( x - μ )/?

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: A standardized test has a pop. mean of 152 and a standard deviation of 16. Molly scores at the 91st…

A:

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

A: The standard normal value helps to understand the number of deviation of observations from the mean.…

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

A: GivenDeAndre earn in science=81.2Jonah earn in Art History=61.9For science Mean(μ)=72.2standard…

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

A:

Q: Out of a class of 25 students, 24 took an exam in class and got a mean of 74 points and a standard…

A: Given: Total number of students, n = 25            Number of students who gave the test, n' = 24…

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

A: Rahquez took a test in Social Studies and earned a 78Jonah took a test in Math and earned a 70.4The…

Q: A set of math test scores has a mean of 70 and a standard deviation of 8.  A set of English test…

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

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

A:

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

A:

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

A: Given information- For Science- Population mean µ = 71.3 Standard deviation σ = 8.9 For English-…

Q: The first exam for a Stats course had a mean of 80 and a standard deviation of 4 points; the second…

A: To identify the appropriate ranks of Reginald and Sara, the z-score, which provides the positional…

Q: A line for tickets to a broadway show had a mean waiting time of 20 minutes with a statistic…

A: Given, Mean = μ = 20Standard deviation = σ = 4       To find, P (X > 28) = ?

Q: On the SAT, the average Writing score is 490 points and the average Math score is 547 points. The…

A: From the provided information, Average Math score (µ) = 547 points Standard deviation (σ) = 89…

Q: ou are a teacher at a gifted school, and you feel that the newest class of students is even brighter…

A: From the provided information, Population mean (µ) = 127 Sample size (n) = 32 Sample mean (x̅) = 134…

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…

Q: 2) After doubling all of the scores, the mean was found to be 28 and the standard deviation was 4.…

A: Let's denote the original mean as  and the original standard deviation as .After doubling all of the…