What information is provided by the sign (+/–) of a z-score? What information is provided by the numerical value of the z-score?

Q: Please help   You are given the following data, where X1X1 (final percentage in history class) and…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: Suppose that the mean score of a class of 29 students was 78. The 16 male students in the class had…

A: From the provided information, The mean score of 29 students was 78. The 16 male students has mean…

Q: In the output from a classification tree, R gives a quantity called "loss". Which answer best…

A: Given that,In the output from a classification tree, R gives a quantity called "loss". The objective…

Q: •. Find the mean, median, and mode of 9,10,1,2,9,8,-3,9.

A: We have given that the value of some observations are X: 9,10,1,2,9,8,-3,9 Number of observation= 8…

Q: Where do p-values concentrate?

A: Under the null hypothesis H0 about the unknown distribution of the test statistic, the p value is…

Q: What is the percentage of scores that lie between a z score of -2 and a z score of 1?

A:

Q: Explain the value of p?

A:

Q: Explain the general rationale behind using a z-score for describing how an individual performed on…

A: The z-score, also known as the standard score, is a statistical measure that quantifies how many…

Q: What is the value of EX^2 for the scores 2,4 and 5? 11 45 36 33

A: We have to find sum of x2

Q: Please no written by hand solution and no img  In a random survey of 40 algebra 1 students at A&M…

A: Number of students who love their math class = 30 Total number of students surveyed = 40

Q: Identify the probability of success for x∼B (12,0.8)

A: Given  X~B(n=12,p=0.8)

Q: how did you find the mean? why is it 72.5

A: Given data :  The observation in increasing order is 30, 40, 50, 50,50, 55, 55, 55, 60, 65, 70, 70,…

Q: How can data be compared?

A: Here, we have to describe the different ways by which data can be compared.

Q: Why is the sum of the sum of six deviations -2, -1, -1, -1, 0, 5 when added =0?

A: Solution:It is one of the property of sample mean that the sum of deviations above average and the…

Q: What does it mean when a score is in the tail of a distribution?

A: The distribution in statistics or probability is the shape in which the data behaves when plotted.…

Q: What does Z-score tell you about someone's score in a class and what does it mean if it is negative…

A: Z-score. Consider the score of someone in a class as x. Z-score: The Z-score measures a particular…

Q: How do you explain the variables of a histogram?

A: Histogram is a visual representation by showing the frequency of data that fall within a specified…

Q: How do you find the median of X?

A:

Q: How do you figure out which team is closer?

A: In triangle LBM∠BLM=52°∠LBM=38°+52°=90°∠BML=38°

Q: Explain the variance of the sum or difference of the two variables X and Y ?

A: Variance of sum of two variables: The variance of the sum of two or more random variable is equal to…

Q: Joselyn hopes to receive a grade of B or better in her statistics class. Currently she has scored…

A: Mean= sum of total obervation/ total no. Of observation