Q1) Statewide real estate sales agency, Farm Associates, specializes in selling farm property in state of Nebraska. Its records point out that mean selling time of farm property is 90 days. As of recent drought conditions, agency thinks that mean selling time is now greater than 90 days. Statewide survey of 100 farms sold recently disclosed that mean selling time was 94 days, with the standard deviation of 22 days. At.10 significance level, has there been an increase in selling time?
Q2)(a) Use frequency distribution to create the probability distribution, determine the (b) mean,(c) variance and (d) standard deviation of probability distribution and (e) interpret results in context of the real life situation.
Extracurricular Activies:
Number of school-related extracurricular activities per student
|
Activities
|
0
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
|
Students
|
19
|
39
|
52
|
57
|
68
|
41
|
27
|
17
|