Arithmetic mean

1. What is an exact probability model for the number of automobile accidents over the past year for the 50 medical interns? (Note: The 11 reported accidents include both police-reported and non-police-reported accidents). Answer:- Fixed Proportion = .065 Number of interns involved in accident last year = total number of interns*.065. n = .065*It where n denoted interns in an accident and It denotes the total number of interns. P(n) = ItCn*.065^n*.935^(It-n)......from .binomial probability…

From the scheduling optimization, it was first determined, based upon data, the frequency of arrivals on each day of the week showing Friday as the busiest check-in day for the resort. After the busiest days were identified, data was optimized to indicate the frequency of check ins, with the majority of check-ins occurring between 4 p.m. and 2 a.m., no check-ins occurring between 4 a.m. and 11 a.m. (check in time begins at 11 a.m.). Below is the chart to indicate the results. From the data…

distributed. Example: Is the mean of systolic blood pressure level for women use of oral contraceptives is identical with women does not use of oral contraceptives, the sample mean > 30, we known the population standard deviation and it is normally distributed. H0: µ1=µ2 H1: µ1≠µ2 2. t- test is used when the population standard deviation is not known, the sample size is less than 30, and the underlying population is normally distributed. Example: Is the mean of systolic blood…

representation of a habitat. A t-test is a statistical analysis that compares the means of two populations, wherein the variances of the data determine whether or not the means differ significantly. From a t-test a null hypothesis can be determined. The null hypothesis for this study is the mean number of species found within the lawn and the prairie are the same, while the alternative hypothesis states that the mean number of species found within the lawn and the prairie are not equal. As…

specialty, which may take them years, depending on the difficulty of the specialty. Stress A new specialty means people will be doing things that they are not used to doing or haven 't even done before. This can lead to an extreme amount of stress being experienced because people want to perform well at their job and be noticed for the great work they are doing. Being the new kid on the block means every move people make will be monitored closely. It is uncomfortable and stressful to be in…

the “Histogram of Test Scores”, Appendix A(2), the data can be described as normally distributed. The descriptive statistics result for the variable “Test Scores” in Appendix A (1), also indicates that the distribution is symmetric around the mean, with the mean value of 52.6 points and the median 51 points. This shows that the data values appear to be close to the center of the data and that…

This supports the hypothesis that a young adult 's habitual coffee consumption has an effect on memory. Although, the effect might not be as favorable as believed. If the means of the daily and monthly consumers are any indication (135.8, 137.3, respectively), it’s possible that monthly coffee consumers have the higher number of correct responses. As for the average reaction time (0.83, 0.82), daily coffee consumers have…

------------------------------------------------- A life insurance company wants to estimate their annual payouts. Assume that the probability distribution of the lifetimes of the participants is approximately a normal distribution with a mean of 68 years and a standard deviation of 4 years. What proportion of the plan recipients would receive payments beyond age 74? Round your result to four significant places after the decimal. 4. -------------------------------------------------…

A small burette funnel was filled with column packing solvent at mobile phase, high boiling petroleum, in this case hexane (and then 10%acetone hexane mixture), and Alumina as stationary phase. When adding the sand and the alumina they have to be first mixed with the hexanes in order not to disturb the column. The Lycopene is Red- Orange and more attracted to alumina due to its high degree of Unsaturation, which can be expected to be eluted after Yellow-Orange Carotene pigments. And the other…

Confirm that the simulation has been reset by checking that the Time Elapsed box to the right of the Control Panel reads “0 Years”. 8 Click the STEP 50 button on the Control Panel, and the simulation will run for 50 years and automatically stop. Watch the graph to confirm that the size of the moose population changes dramatically when the moose first arrive, and then eventually stabilizes (levels out). ← You can adjust how fast the simulation runs with the SPEED slider to…