What is the 75th Percentile of a data set when the Inter Quartile Range (IQR) is 12.5 and the first quartile is 8.5?

Q: What is a frequency distribution of qualitative data and why is it useful?

A: Frequency distribution: Sometimes an event will be occurred two or more times, the number of…

Q: At a large industrial plant, employees were classified according to age and given a leadership exam.…

A: Hypothesis testing is an inferential procedure of testing a claim about a population characteristic.

Q: What is the 73rd percentile of a normal curve? * Previous

A:

Q: What is the difference between prevalence and incidence? Over time, how are the measures of…

A: The Main difference between Prevalence and Incidence is defined as follows  Prevalence measures or…

Q: How do you find the Ouartiles and the IQR?

A: Quartiles are values that divide the entire set of data into quarters. The different types of…

Q: What does an extreme value at the high end of the data set mean?

A: The numerical data can be divided into two parts. One being discrete and other continuous. As the…

Q: The median for the dataset used to create this histogram could possibly be in which range?

A: Frequency Distribution table : Class Frequency Cumulative Frequency 2-4 1 1 4-6 4 1+4=5 6-8…

Q: Why is the range much less informative (and much less useful) as a measure of variability than the…

A: Solution-: The problem with using the range as a measure of variability is that it is completely…

Q: What is the formula for a deviation score from a population?

A: Formula :

Q: Explain how can we find the corresponding z-score of an area and a percentile.

A:

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

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Q: Explain why the minimum and maximum observations are added to the three quartiles to describe better…

A: Quartile: Quartiles are the values which divides the data into four equal parts. First quartile:…

Q: the measure of variability that is influenced most by extreme values is

A: The range is the measure of dispersion or variability. The range can be calculated as: Range…

Q: What kind of test is used to solve the test statistic value for the population proportion?

A: We want to tell you what kind of statistic and test are used for population proportion.

Q: Your instructor has the Mid-Term examination grades. He told you that the 25th percentile is 51 and…

A: Given that, Your instructor has the Mid-Term examination grades. He told you that the 25th…

Q: Putra College surveyed its students to determine the average weekly time spent surfing the internet.…

A: Population in the set of all outcomes of interest in a study. In real life scenarios studying the…

Q: What is the value of the test statistic, F?

A:

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: If the variance of a national accounting examination is 828, how large a sample is needed to…

A: Given data: Variance  = 828 Margin of error = 4 points Confidence level = 99 % To calculate the…

Q: At the 5% significance level, is there a significant overall difference between the proportion who…

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Q: The IQ scores of children in a special education class are normally distributed with μ = 95 and σ =…

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Q: A police officer waits on a road to catch speeding cars. In a one hour sample, the officer find that…

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Q: What is helpful to interpret bivariate tables~ percentages or frequencies?

A: Given that  We have to define  What is helpful to interpret bivariate tables percentages or…

Q: What is the Differences Between Predicted and Observed Values

A:

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 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: cores are normally distributed with a mean of 100 and a standard devaition of 15.  What IQ score…

A: Given: μ=100σ=15

Q: What is measured by the numerator of the z-score test statistic?

A: # What is measured by the numerator of the z-score test statistic?

Q: An examinee of the National Medical Admission Test (NMAT) got a percentile rank of 95%. What does…

A: Given that an examinee of National Medical Admission Test (NMAT) got a percentile rank of 95% .

Q: What is the 40th percentile of wait times for customers calling the help line?

A: Here given  Amount of time customer wait is exponentially distributed with mean 7.5 minutes

Q: hat is a percentile and how do we plot them on box and whisker plots?

A: Percentile is the value in statistics which divides the population in two groups. The certain…

Q: on a 100 item test romel got a score of 88 which is the 9th decile what does it mean

A: Di = i * (n + 1)  10 th data

Q: Which student has larger Inter Quartile Range (IQR)?

A: IQR= Q3-Q1

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 z-score of the 31st percentile?

A: The z-score for the 31st percentile is the value such that 31% of the area under the standard normal…

Q: In spss, what test can you do to compare the score of variables?

A: As per the question we have to compare the score of variables if we have 2 independent samples, we…

Q: The test scores for a class of 203 students are computed. What is the location of the test score…

A: Third quartile is above 75% of the observations.

Q: Determine the percentage of data values that lie between the upper and lower quartiles .

A: In a box-plot the left end line of box denote lower quartile, the right end line of box denote upper…

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: What is a confidence interval in statistics?

A: In inferential statistics, the two types of estimation are: point estimate and confidence interval…

Q: In a 70 item test, Chloe got a score of 50 which is the third quartile. What does it mean?

A: We know that their are 75% data points are lies below the third quartile.

Q: Please also explain why you determined whether or not the results are statistically significant.…

A: From the given information we conduct Hypothesis test.

Q: A consultant for a large university studied the number of hours per week freshmen watch TV versus…

A: Let μ1 denotes the mean number of hours per week freshmen wash TV, and μ2 denotes the mean number of…

Q: When will a chi-squared statistic equal zero? You need to very specifically discuss the data.

A: Generally, the chi-squared statistics are always related to the null hypothesis of given data. When…

Q: What is the formula for the mean absolute deviation formula for paired data sets?

A:

Q: How can I describe and differentiate the properties of the decile, quartile, and percentile?

A: Decile, quartile and percentiles are the partition values.

Q: Compose the score values for 3 samples that have the same mean and median, but differ in the amount…

A: Part 1   2, 4, 6 3, 4, 5 4, 4, 4     Explanation: Part 1   There are many different conceivable…

Q: A researcher is looking at the relationship between rates of lung cancer and smoking status. they…

A: There are two variables in the study; *Smoking status of subjects, in terms of yes or no. *Lung…

Q: When I’m trying to infer the population mean from a small sample, why do I have to rely on the…

A: Assumptions to use standard normal distribution to estimate population mean:The required conditions…

Inverse Normal Distribution

The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.

Mean, Median, Mode

It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.

Z-Scores

A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.