8.1 #1
A simple random sample of 40 items resulted in a sample mean of 25.
The population standard deviation is =5.
a) What is the standard error of the mean, _
?
0.79
b) At the 95% confidenc level, what is the margin of error?
1.55
8.1 #2
A simple rand
BUS240 Assignment #7
Use Excel to perform the calculations needed for this assignment
Section 6.1
1. The random variable x is known to be uniformly distributed between 1.0 and 1.5.
a) Show the graph of the probability density function.
F(x)= 1/.5 for 1</=
BUS240 Assignment #6
Section 4.1
1. An experiment has three steps with three outcomes possible for the first step, two
outcomes possible for the second step, and four outcomes possible for the third step.
How many experimental outcomes exist of the entire
Consider a sample with data values of 10, 20, 12, 17, and 16. Compute the z-score for each of the five observations. (2.5 points)
x
10
20
12
17
16
z
-1.25
1.25
-0.75
0.283333
0.25
mean:
standard:
15
4
Consider a sample with a mean of 30 and a standard dev
The average hotel room rates for 20 cities are as follows:
a. What is the mean hotel rate? (1pt)
b. What is the median hotel room rate? (1pt)
c. What is the mode? (1pt)
d. What is the first quartile? (1pt)
e. What is the third quartile? (1pt)
Rate per Nig
Fifty randomly selected adults were asked to name their favorite sports league.
All answers to the following questions must show the use of the appropriate Excel function. No hand calculations will be accepted.
a. Find the "frequency distribution" for the
The following data represent the weights in kilograms of maize harvest from a random sample of 30 experimental plots on the island of St Vincent (Caribbean).
All answers to the following questions must show the use of the appropriate Excel function. No ha