A standardized memory test has a mean of µ = 100 and a standard deviation of σ = 10. Answer the following questions: a. What proportion of people would score below 87 on the memory test? b. What is the percentile rank for someone who scored a 109 on the memory test? c. What are the scores that separate the middle 20% (10% on each side of the mean) d. What percent of individuals would score between 89 and 115?

Q: Given a set of data that is skewed-left, there is at least _____ % of the data within 3 standard…

A: From the given information, Consider, As it has been given that data is left skewed as a result one…

Q: that presents 30 test scores on an exam, find the 63rd percentile. State your result/answer as a…

A: Let X be the test scores on an exam. The given data is : 49.5, 48, 51, 50, 53.2, 52, 55, 54, 57, 56,…

Q: Please explain how to do these questions.  Using this data set attached:  1. Consider the…

A: 1. Two surveys are made for 12-month proportion high risk drinking, between men and women , in  a.…

Q: Given the following data set that presents 30 test scores on an exam, find the 95th percentile.…

A: 95th percentile= 95*(n+1)/100th term

Q: he following are scores on exam 1 of a statistics course.                    80        84…

A: Mean: The sample size (n) is 10. The mean is calculated as follows:

Q: You are given the following information for a sample (mean = 40; standard deviation = 10). What is…

A: According to the provided information:

Q: Given the following data set that presents 30 test scores on an exam, find the 73rd percentile.…

A: Given data, 49.5, 48, 51, 50, 53.2, 52, 55, 54, 57, 56, 59, 58, 61, 60, 63, 62, 65.4, 64, 67.5, 66,…

Q: For the following sample of n = 7 scores: 8, 6, 5, 2, 6, 3, 5a. Sketch a histogram showing the…

A: Final Answer:

Q: Given the following data set that presents 30 test scores on an exam, find the 95th percentile.…

A: 95th percentile= 95*(n+1)/100th term

Q: With your sample of 25 inmates, you want to test if the population mean age is different from 40 at…

A: for more information ping me    happy learning

Q: Consider the following means and their standard deviations. Which set of scores represents a more…

A: Mean =22 and s.d =3   Represent more homogeneous  data set i.e data scores are more similar to each…

Q: Suppose you are given the following sample data for commute times of students to WCC (in minutes):…

A: Given data is 6 , 12, 13, 5 , 20, 17 and 32.  Total number of events( N) = 7  Therefore the sample…

Q: Calculate the mean and SS(sum of squared deviations) for each of the following sets of scores.…

A: Given data ,Set A : 2,6,3,1Set B : 2,4,1,3

Q: The following data are the GPA’s of 12 students at State University. Determine the mean, median,…

A:

Q: The scores on the Wechsler Adult Intelligence Scale are approximately Normal, with  = 100 and  = 11.…

A: The scores on the Wechsler Adult Intelligence Scale are approximately Normal

Q: uppose that the low daily temeprature is a mean of 25 degrees and a standard deviation of 12…

A: Given data,μ=25σ=12

Q: Given a set of data that is skewed-right, there is at least % of the data within 3 standard…

A: Given

Q: 1. Given the data set which represents quiz scores in your math class: 12, 15, 16, 16, 17, 22 find…

A: Note: Hi! Thanks for posting the question. Since there are more than three sub-part questions, we…

Q: Which of the following standard scores reflects the best relative performance on a test?   Group…

A: We have to identify which of the given standard scores reflects the best relative performance on a…

Q: If the age distribution is a bellshaped distribution, what percentage of the students are less than…

A: Obtain the percentage of the students are less than 23 years old. The percentage of the students are…

Q: Given the following data set that presents 30 test scores on an exam, find the 95th percentile.…

A: Given data and calculation for mean and sample standard deviation is shown below

Q: Given the following data set that presents 30 test scores on an exam, find the 95th percentile.…

A: Answer:-  N=30 Here, we need to sort the data in ascending order. 48…

Q: what range of raw scores makes up the middle 40%

A: The middle 40% means, the scores lie between 30th and 70th percentile. From stand normal, z-score…

Q: In a normally distributed population, one standard deviation from the mean most likely represents…

A: In a normal distribution, about 68% of the data falls within one standard deviation of the mean,…

Q: For the sample of scores in the following frequency distribution table, what is the standard…

A: Given: n= ∑f=11

Q: B. Your process has a normal histogram with mean located at 10 mm, 1s points at 9.9 and 10.1 mm, 2s…

A: Consider the give information in which a process has a normal histogram with mean located at 10 mm.

Q: C2. GSS 2014 and GSS 2018 respondents were asked their opinion on whether homosexuals should have…

A: Given information: GSS 2014 and GSS 2018 respondents were asked their opinion on whether…

Q: If a z-score value of a data set is 1.35 what percentile does this correspond to?

A:

Q: In a study about children's pocket money, two samples of schoolchildren were asked how much money…

A: Combined mean=n1x1+n2x2n1+n2 Given that, n1=first sample size of childrens pocket money=87 x1=first…

Q: Given the following data set that presents 30 test scores on an exam, find the 95th percentile.…

A: The given data set represents 30 scores of a test as follows: 49.5, 48, 51, 50, 53.2, 52, 55, 54,…