Read Chapter 10 of the Salkind textbook and attended the Module 8 Lecture, you will complete an in-class analysis of a healthcare dataset using the SPSS statistical software.
Perform inferential statistics on this dataset and then write your findings in the format of a research abstract.
Background Information: You are an infectious disease epidemiologist investigating a large outbreak of COVID-1.9 that occurred among guests at a 500-person wedding in New York City in December 2021..
In total, 1.00 guests tested positive for COVID-19 and experienced COVID-1.9 symptoms within the week following the wedding. You obtain data on each guest, including each guest’s estimated incubation period (time from infection to symptom onset) in days. As you are not able to obtain sequencing data on patient specimens, you do not know whether this was an outbreak of the Delta variant of COVID-19 (which circulated widely from July 2021 through December 2021), or the newer Omicron variant of COVID-19 (which overtook Delta in late December 2021).
You would like to determine whether the Omicron variant was responsible for this outbreak. Your population of interest is all those who have experienced Omicron-variant COVID-19 disease worldwide, and your sample is the wedding COVID-19 patients.
You learn that the mean incubation period for those experiencing Omicron-variant COVID-19 disease is 3.2 days, with a standard deviation of 2.2 days,’ while the mean incubation period for previous COVID-19 strains is longer (4-5 days).
Compare your sample mean incubation period to the mean incubation period of all those experiencing Omicron-variant COVID-1.9 disease to determine whether these means are significantly different from one another.
This would provide some clues as to whether Omicron-variant COVID-1.9 was responsible for the wedding outbreak.
Your hypotheses are as follows: Ho: gwedding = gOmicron worldwide gwedding * gOmicron worldwide
You set your significance level at a=0.05 and decide to compute a one sample z test. Recall that the formula for the z test statistic is as follows: X—µz = = g— SEM
Analysis Instructions:
1. Use this sample mean, along with the population mean and population standard deviation given in the Background Information, to calculate the z test statistic.
2. Using the research hypothesis (is it directional or non-directional?) and significance level (a), determine the critical z value needed for rejection of the null hypothesis.
3. Compare the obtained z value with the critical z value. Determine whether the obtained z value exceeds the critical z value.
4. Determine whether you reject or fail to reject the null hypothesis, and interpret in the context of the study.
Abstract instructions:
Write an abstract summarizing the statistics you performed in 500 words or less. This abstract must contain the following sections: Introduction, Methods, Results, and Conclusion.
Do you think the COVID-19 variant responsible for the wedding outbreak was likely Omicron? (1 point)
