What does a z-score of 3 for a data value x represent? What does a x score of -1 for a data value x represent?

Q: When do you need to calculate and use a Z - Score? What are the assumptions when you use a Z score?

A: We have to find need of calculate and use of z score..

Q: What are Z scores?

A:

Q: Identify the type of table that is used to group bivariate data.

A: In this case, we need to identify the type of table that is used to group bivariate data.-

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: Could you please help me understand the difference between a z-test and a t-test for in statistics?

A: Both the tests are useful to test the significance of means.Both the tests are assume a normal…

Q: What information is provided by the sign (+/–) of a z-score? What information is provided by the…

A: Let, the dataset scores have a mean µ and standard deviation σ. Then the z score of a given score ,…

Q: What is z Score?

A: A z-score is a score which is computed to find out the number of standard deviations a value is away…

Q: What is a T-Test? How is it applied to a Single Population Data Set?

A: Student's t-test was given and first used by W.S. Gosset in 1908. The statistician W.S. Gosset is…

Q: How do we find the corresponding z-score of an area and a percentile?

A:

Q: Hello. What is the correct answer? Thanks.

A: SolutionThe correct answer option is c. the standard deviation of errors is zero.Explanation:The…

Q: How to build a histogram based on this data

A: Histogram is the graph that helps to visualize the categorical data. It helps to undertsand the…

Q: how will you relate the formulas for quartiles and deciles of grouped data?

A: The formula for the ith quartile is: Qi=L+in4-cff.w Where L is lower bound of the class, c.f is…

Q: What proportion of scores of a normal distribution is less than  z = - 2.15?

A: Obtain the proportion of scores of a normal distribution is less than z = – 2.15. The proportion of…

Q: What is an example of a statistical presentation ? Can you tell me what is it telling me ? What…

A: In statisics, graphs are helpful in presenting the statistical data. In order to improve the…

Q: To examine bivariate data graphically, the best choice is two side by side histograms? Define this…

A: Introduction: A histogram is a graphical display mainly used to plot a univariate continuous…

Q: What is the Numerical Value of correlation coefficient?

A:

Q: A negative z score indicates that an individual's raw score:

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

Q: What are the three value to indicate variability of a data set How do you determine whether it is…

A: Variability :  It refers to the difference being shown by the data points within a data set, as…

Q: The sum of squares of deviation is least if measure from а. Median b. Mean

A: the sum of squares of deviation is least when measured from ?

Q: how do i find quartile 1 in a set of data?

A: First quartile: The first quartile is the middle-most observation or median of the lower half of the…

Q: The average student studies eight hours for a statistics exam and receives a grade of 84. In a…

A: Given that, Claim: Test the hypothesis that the studying twelve hours statistically significantly…

Q: Why are t statistics more variable than z -scores?

A: t-statistics uses sample variance instead of population variance.   t statistics has both s and x̅.

Q: How do we do Z-test on a quantitative data? Give an example.

A: Z test

Q: The first quartile of the data values 45, 48, 31, 48, 50, 30  equals ?

A: Arranging the data into ascending order: 30, 31, 45, 48, 48, 50

Q: a sample of 60 grade 9 student age was obtained to estimate the mean age of all grade 9 students. x…

A: A sample of 60 Grade 9 students' ages was obtained to estimate the mean age of all Grade 9 students.…

Q: Why is it important to understand z-score? Please explain your understanding of z-score.

A: A Z-score, otherwise called a standard score, is an action for how far an information point is above…

Q: Define Bivariate Analysis?

A: Most of the time, the data in statistics is in the form of bi-variate data.

Q: For what types of data would you use nonparametric verses parametric statistic?

A: In hypothesis testing, the parametric tests are used to make inference on some unknown parameters…

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: The test scores for a class of 155 students are computed. What is the location of the test score…

A: Given that  The test scores for a class of 155 students are computed n=155 Find the location of the…

Q: 2.What does a x score of - 1 for a data value x represent

A: Given: z-score=-1

Q: When do you need to calculate and use a Z - Score?

A: Z - score :  A z-score describes the position of a raw score in terms of its distance from the mean,…

Q: What is the Small Values of Squared Correlation Coefficient?

A: The squared correlation coefficient is known as coefficient of determination denoted by R2.

Q: What does it mean when a constant is added to every data value in a data set ?

A: when a constant is added to every data value in a data set, there will be a change in the…

Q: How do you tell if a ANOVA is significant given the F value, p value, and eta squared? What does the…

A: In ANOVA, the null hypothesis is that there is no difference between group methods. If any group…

Q: The Pearson r test is a significance test used to determine whether a linear relationship exists…

A: Pearson r test: The Pearson r test is used to test the significance of correlation between the two…

Q: How is a z-score obtained? What is the interpretation of a z-score? An observation has a z-score of…

A: We have to give formula and interpretation of z score.

Q: I want a dataset for my statistics research project. in which i can find at least 3 Quantitative…

A: It is  advertise data set  TV, Radio and Newspaper are independent variable and sale is dependent…

Q: ) what is the first quartile? B) % of the data between 30 and 36

A: See the handwritten solution

Q: The inter quartile range (IQR) of the data: 2, 4, 4, 5, 6, 7, 8 is equal to 2. 3. 6.

A: According to the given information, we haveData set: 2, 4, 4, 5, 6, 7, 8

Q: How can you say that Mode Always Appropriate for Qualitative Data?

A:

Q: What type of data would you use for collecting data on lap swim time

A: Continuous Data represents measurements and therefore their values can’t be counted but they can be…

Q: do I find the standardized z-score?

A: A z-score gives you an idea of how far from the mean a data point is.

Q: What does the P-value describe?

A: P value can be defined as the probability value for a given statistical model that null hypothesis…

Q: The scatter plot is used to examine the relationships between different functions in the statistical…

A: Solution: Scatter plot: Scatter plot is a graphical technique or method of identifying the linear…

Q: One advantage of transforming x-values (raw scores) to a-score is

A: Raw score can be converted to z score using z score formula.

Q: The average number of students in the college of business is 56, with a variance of 5. The…

A: GivenMean(x)=56Varaince(σ2)=5standard deviation(σ)=5=2.2361Median  was greater than mean by

Q: What does a negative z score mean?

A: In this question we have to tell what does the negative Z score implies. A Z Score means that how…

Q: lculate the z-score of the

A: Given: a) Data is as follows 2 4 5 7 8 9

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.