# Chi Square Test Case Study

Decent Essays
1.
a. The data set consist of 44 female and 53 males.
b. There are 21 people under the age range of 13-35, which account for 21.6% of the total 97 in the sample.
c. The mean level of the hour spent in the office during week 2 is 47.47 hours, with the standard deviation of 17.06. The distribution is slightly negative skew (-0.237), although in an acceptable range suggest that slightly more samples spend more hours in office than the average. The distribution’s value for kurtosis (-1.005) exceeds the acceptance level (value between 1.0 and -1.0.), implying it has a ‘Platykurtic’ characteristic. This means that value is less cluster around the mean, with heaver tails.

2.
In order to test for significant dependency between two categorical data, we conduct Chi-Square Test.
The null-hypothesis is that there is no significant difference in sales performance between males and females. Before we get to the T-value, Levene’s test for equality of variance must conducted. In SPSS, if Levene test produces a significant figure greater than 0.05, then homogeneity of variance is hold, and the top-row corresponding T value is selected. In both weeks homogeneity of variance is hold. In week 1, the T-value (df=95) is 1.848. This generates a p-value of 0.068, which exceeds Fisher’s threshold and therefore null-hypothesis is hold. There is no significant difference in sales performance when compare males (mean=4232.34) to females (mean=5227.86). In week 2, the T-value (df=95) is 2.828 and the p-value derived is 0.006. Here, the possibility that the difference is due to mere random chance is less than 1% therefore the difference in sales performance between males (mean=4175.92) and females (mean=5675.97) in week 2 is strongly significant. A conclusive argument can be drawn that in week 2, females have a better sales performance than male

## Related Documents

• Superior Essays

Problem 1.17 In problem 1.17, the average age of pinon trees in the coast ranges of California was investigated. 500 ten-hectare plots randomly selected using a computer. The age of every pinon tree within each plot was measured and the average age of the plot was used as the unit measurement (Whitlock and Schluter, 2015, pg 20).…

• 2314 Words
• 10 Pages
Superior Essays
• Improved Essays

The mean is the most important measure and is used for interval and ratio data and is not used with nominal or ordinal data (Walker, 2009, p. 106). Based on the questions asked in this assignment, the statistical analysis would be considered…

• 1111 Words
• 5 Pages
Improved Essays
• Improved Essays

Therefore, we conduct two-tailed two sample hypothesis tests to compare device manufacturers, such as, Apple and Samsung and determine if there is a difference beyond the significance level in the proportion of their devices that must be replaced due to warranty related issues (Poncet et. al., 2016). Moreover, our Customer Service and Marketing departments also conduct two-tailed two sample hypothesis tests to assess the proportion of customers with an Apple or Samsung device that call customer service within 30 days of activation with questions about the device and determine statistically significant result beyond our significance level (Mirabella, 2011). Subsequently, we are able to accurately assess if there are any statistically valid variances in device quality and usability between device manufacturers. In conclusion, these are just a few of the many ways my organization utilizes two sample hypothesis testing to assess the statistical similarities and differences of various business processes (Barchard,…

• 417 Words
• 2 Pages
Improved Essays
• Improved Essays

Mode will be calculated for age, education level, ethnicity and referral source. From the frequency (f) distribution table and data table, bar charts and pie graphs will be generated to help visual the…

• 812 Words
• 4 Pages
Improved Essays
• Improved Essays

The appropriate test is a chi-square test for goodness-of-fit. The conditions for this test were satisfied…

• 932 Words
• 4 Pages
Improved Essays
• Improved Essays

Currently in newest figures from 2013 shows an estimated resident population of 58,158. The following statistics are from the year 2012 – working on these 2012 data the residents of West Torrens area was 57,525 – 28,223 are male and 29,302 are female. The median age for the area is 37.6 years of age.…

• 772 Words
• 4 Pages
Improved Essays
• Improved Essays

Problem Set 7.1 a) Null Hypothesis: Within the 95% confidence interval there is no significant difference between the two-point threshold test disdances among the different areas. Alternate Hypothesis: Within the 95% confidence interval there is a significant difference between the two-point threshold test disdances among the different areas. b) The null hypothesis should be rejected because the p-value is 0 which is lower than 0.05, also because the conifence intervals for the back of the hand and the fingertip does not overlap to be statistically equal. c)…

• 1494 Words
• 6 Pages
Improved Essays
• Improved Essays

Sickle cell disease is an inherited disorder that is caused by a mutation in the DNA sequences that codes for the beta chain of the hemoglobin protein. Red blood cells are, normally, flexible and round, but with the sickle cell anemia the red blood cells become sticky, rigid, and crescent shaped. The Hemoglobin protein carries oxygen in the red blood cells throughout the body. With the disease, the blood cell’s shape can cause them to get lodged in the blood vessels resulting in the obstruction of blood flow, especially in the smaller arterial vessels in the body This occurrence not only reduces oxygen content to the area of concern, but can be a very painful experience for the victim. People who inherit this disease have two abnormal hemoglobin…

• 2147 Words
• 9 Pages
Improved Essays
• Decent Essays

Good summary of the study. I wonder why the table three lists the Wilcoxon Rank Sum test rather then results from a Chi-Squared analysis. I also wonder how the increase in primary care services relates to readmission. Where the primary care providers telling the patients to go to the ER? I think that this would be interesting to…

• 59 Words
• 1 Pages
Decent Essays
• Superior Essays

The target population that he authors wanted to study was children in Elementary School. The population from which the sample was taken represented the appropriate people because the authors studied children from fourth through sixth grade (elementary school). The average age of children who participated was 10 years, and 26% of them were from public schools, 26% from a public school, and 7% from a parochial school. The schools indicated that 60% of children were Black, 26% were White, and 14% were from other ethnicities. They also measured children’s teachers to analyze participant’s emotion regulation.…

• 1394 Words
• 6 Pages
Superior Essays
• Superior Essays

Hello Smita, This semester, I took a history class called “History Today: Debates and Practices” for my history minor. Throughout the semester, we discussed various ‘houses’ (or approaches) to studying history, and the various benefits and drawbacks of each. Historians and political scientists both get to decide what time span – as well as what scale (micro to macro) – to study. Although both political scientists and historians study evidence to construct a narrative about what is going on, historian’s writing reads much more like a story than political scientist’s – because who wants a story about chi-squares and P-values and regression analysis?…

• 1171 Words
• 5 Pages
Superior Essays
• Improved Essays

Introduction Surveying patients after they are discharged from the hospital can be a valuable tool leaders at a facility can use to determine areas of strengths and areas of weakness. In order to improve quality of care and improve patient satisfaction the well-known HCAHPs scores are the current industry-standard by which in-patient hospitals measure. Beryl is another well-known survey used after discharge, typically 48-72 hours after discharge, which can actually influence HCAHPs scores. This telephone survey affected one hospitals “overall rating” score to increase 12 percentage points (Beryl health, 2011). The director for Beryl, Cynthia Hanna, RN expressed the importance of capturing data immediately after discharge to understand patient…

• 804 Words
• 4 Pages
Improved Essays
• Improved Essays

The mode is 9.5. The median is 8.85. The standard deviation is 2.1774925221939. The range is 7.9. The skew is 2.0087082766049.…

• 1452 Words
• 6 Pages
Improved Essays
• Improved Essays

Methods: Materials needed: Bottled water, control (tasteless) strips, PTC testing paper with ~ 0.003mg per strip, 1-inch strips of black licorice. 1. Provide each student with one large medicine cup filled of water. 2. Each student rinse his or her mouth of any residue prior to tasting the PTC paper with water to avoid misreading for data collection.…

• 805 Words
• 4 Pages
Improved Essays
• Improved Essays

Accelerated Resolution Therapy, also known as ART, is a brief exposure-based psychological treatment therapy. ART uses visualization techniques as well as a “directive approach that reduces physical and emotional reactions to distressing memories and images stored in the brain” ("SAMHSA," 2015). ART is intended to treat such disorders as, depression, anxiety, substance abuse, obsessive-compulsive disorder, and phobias ("SAMHSA," 2015). Since 2011, ART an adult based program and has been utilized in community-based programs, as well as private practice and military situations. ART has been successful in treating depression and depression symptoms as well as diminishing trauma and stress-related issues.…

• 606 Words
• 3 Pages
Improved Essays