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

Q: On a nationwide math test, the mean was 75 and the standard deviation was 10. If Roberto scored 85,…

A: The formula of Z-score is,

Q: A group of students wrote an entrance Math exam and the scores were normally distributed. The mean…

A: The scores were normally distributed with mean 750 and standard deviation 95 μ=750σ=95 Z-score is…

Q: In a certain population, the mean price of the stock prices was 230, the median was 262, the…

A:

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: 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: Raul received a score of 77 on a history test for which the class mean was 70 with a standard…

A: for history test:mean(μh)=70standard deviation(σh)=4and xh=77For biology test:mean(μb)=70standard…

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

A: Solution: Given information:   Mean  Standard Deviation  English Class 73.9 9.4 Art History…

Q: The mean grade on a science test was 79 and there was a standard deviation of 6. If your sister…

A: The z score explains the deviations of the observations from the mean. It is calculated using the…

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: The mean grade on a science test was 79 and there was a standard deviation of 6. If your sister…

A: We have given that,  Let X be the random variable from normal distribution with mean (μ)= 79,…

Q: On a nationwide math test, the mean was 63 and the standard deviation was 10. If Roberto scored 85,…

A: GivenMean(μ)=63standard deviation(σ)=10score(x)=85

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

A:

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: 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: A student learns that on his most recent exam in psychology, the sample mean was 72.19 with a…

A:

Q: The mean score and the standard deviation in the Statistics test are respectively equal to 80 and…

A: Normal distribution is a continuous distribution which has many real life applications. Normal curve…

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

A:

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: The mean of a distribution is 291, while the median is 217. Which of these statements is likely to…

A:

Q: Bill scored 35 on a college algebra exam, where the mean was 25 and the Standard Deviation was 5.…

A: Given that the score for algebra exam is 35, mean is 25 and standard deviation is 5. z score for…

Q: a standard deviation of 9.8, and all the students' test grades in Social Studies had a mean of 63.4…

A: Given : a) For Lauren Test value =x= 75 population mean=μ = 76.4 population standard…

Q: Ava scored a 92 on a test with a mean of 71 and a standard deviation of 15. Charlotte scored a 688…

A: HERE GIVEN , Ava scored a 92 on a test with a mean of 71 and a standard deviation of 15. Charlotte…

Q: In the final Examination in Statistics, the mean grade was 82 and the standard deviation was 8. In…

A:

Q: Tanya takes her Physics test and is told that her Z-score is 3.10. If the class mean was 75 and the…

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

Q: Alice was told that her reading test score was 3 standard deviations above the mean. If test scores…

A: Using the empirical rule, The formula for calculating the score of X falls 3 standard deviations…

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: the mean for the Verbal Reasoning section was 151 with a standard deviation of 9, and the mean score…

A: Note: According to bartleby experts question answers guidelines an expert can solve only first three…

Q: Looking at the test data, Jason saw that his score was a 2.5 with a mean of 79 and a standard…

A: We will find the actual score as following.

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

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: In Statsville, there is a city-wide speed limit of 30 mph. If you are caught speeding, the fine is…

A: Let X be the random variable of drivers who were fined Given Data: E(X)=42 SD(X)=7   Let Y be the…

Q: a nationwide math test, the mean was 60 and the standard deviation was 7. If Roberto scored 85, what…

A: Given data,Mean μ=60sd    σ=7 If Roberto scored 85z-score=?

Q: On a verbal skill test, the mean was 72 and the standard deviation was 7. If John scored 75, what…

A: Given data,Mean μ=72sd      σ=7If John scored 75z-score=?

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: If Sarah scored 78 on her history test which had a mean of 70 and a standard deviation of 3 and she…

A:

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

A: Introduction: For a random variable, X with mean μ, and standard deviation σ, the z-score is given…

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

A: If the z-score lies within 2 standard deviation away from the mean, then the score is not unusual…

Q: On the past mathematics test, the bottom 20% of students failed to pass the test. The mean for the…

A: The mean of the data is μ=55 and the standard deviation is σ=11 It is also given that 20% of…

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

A: Obtain the z-score for Stacy's test grade. The z-score for Stacy's test grade is obtained below:…

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

A: Given information- We have given that Miranda took test in social studies and earned a 71.5. And…

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

A: Miranda's test grade (Social Studies) 71.4 75.3 10.7 Karla's test grade (Art History) 60.9…

Q: If your score on your next statistics test is converted to a z-score, which of these 2- scores would…

A: Given: Z-scores: -2, -1, 0, 1, 2. The height converts to the z score is=4.07

Q: on a nationwide math test,the mean was 63 and the standard deviation was 7. if roberto scored…

A: According to the given information, we have Mean = 63 Standard deviation = 7

Q: two fifth grade classes have nearly identical mean scores on an aptitude test, but one class has a…

A: It is given that two fifth grade classes have nearly identical mean scores on an aptitude test, and…

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: The mean grade of  Adrian in the final examination in mathematics was 85 and the standard deviation…

A: Mean for mathematics = 85 Standard Deviation for mathematics = 7 Mean for science = 89 Standard…