Question

1. Consider the data set below.determine if this data comes from a normally distributed population.

1. Draw a histogram and determine if it seems to be mound shaped
2. Determine the number of outliers for your dataset
3. Draw a normal probability plot.

You should comment on whether theses measure suggest normality or not. Use all the measures in your discussion

This data is the number of deaths each year by tornados in the past 30 years

59	32	50	53	39	39	33	69	30	25
67	130	94	41	40	55	54	35	38	67
81	126	21	45	35	69	55	47	36	18

2. Consider the data set below. Your job is to determine if this data comes from a normally distributed population. Remember this means that you should do the following

4. Draw a histogram and determine if it seems to be mound shaped
5. Determine the number of outliers for your dataset
6. Draw a normal probability plot.

You should comment on whether theses measure suggest normality or not. Use all the measures in your discussion

This data is body temperatures from randomly selected individuals at the same time of day (measures in degrees Fahrenheit)

98	97	96.6	98.6	97.6	97	96.8	97.8	97.5	98.3
97.4	96.6	96.6	97	97.2	96.4	98.2	99	97.8	98
97.8	97	96.2	97.4	97	96.1	97.8	97.4	97.9	97
97	96.8	97.6	98	98	98	98.2	97.4	97.8	97.6

Answer 1

a)

b)Variable N    Mean SE Mean StDev Minimum Q1 Median Q3 Maximum
deaths 30 52.77 4.92 26.94     18.00 35.00 46.00   67.0 130.00

c)

d)

e)the out liers are

Variable N Mean SE Mean StDev Minimum Q1 Median Q3 Maximum
body temp 40 97.435 0.104 0.659 96.100 97.000 97.450   97.975 99.000

f)

comment ;- the data of the number of deaths occur is approximately normally distributed from the histogram while when we see the probability plot we find that there are some points which falls outside the lines.

the data of body temperature is normally distributed from the histogram as well as the normal probability plot .