2) A flush, if we pick the suit first, we have 4C1 = 4 choices. For that suit, there are 13 cards
from which we choose 5. Thus, we have 13C5 =
# flushes = 4C1.(13C5) = 5148 = 5148 Dividing by the numb
Lab 10: Disk, Process Scheduling
Note: The exercise numbers below refer to the file LabCH14.pdf.
Exercise 1, LabCH14.pdf
3. [1 mark] . write down how many seconds it takes.
Answer :- Time taken by thi
STAT 1181
Assignment - 2
1. First we must write it in ascending order: 120, 123, 125, 126, 134, 139, 144, 145, 146, 160, 162, 162, 166, 167, 167, 173, 177, 192, 207, 245
a) Mean =
X
= Sum of all obser
S3222 Solutions to Midterm 1
Question 1
n1 p 2501 0.12 220 5
np 2500.12 30 5
We can apply Normal Approximation here.
p the proportion of 250 randomly selected people who are left-handed
z
z
0.10 0.12
Solutions to HW2 (50 marks)
Question 1 (6 marks)
a) Since n 40 30 and is known, the z distribution should be used. (1 mark in
total: 0.5 mark for n > 30, 0.5 mark for known)
b) (3 marks in total)
the
STAT 3222 Homework 4 (40 marks)
Due: Wednesday, November 15, 2017
1. A research organization tested microwave ovens. The prices of microwave
oven were recorded in S3222 HW4 F17.xlsx. (12 marks)
1000
2
Solutions to HW3 (40 marks)
Question 1 (21 marks)
a) (6 marks in total)
1 the standard deviation of salaries for secondary school teachers (0.5 mark)
2 the standard deviation of salaries for element
Solutions to Quiz 1
Question 1
The distribution of the cholesterol levels of 24 patients is left-skewed.
Question 2
a) X the annual chocolate consumption by Canadians
z
4.2 5.8
0.94
1.7
P X 4.2 Pz 0.
Solutions to HW1 (40 marks)
Question 1 (6 marks)
a) (2 marks for showing the Excel output of a frequency distribution)
Final Grade
A
B
C
D
F
Frequency
7
14
6
1
2
b) (2 marks for showing the Excel outp
STAT 3222 Homework 1 (40 marks)
Due: Wednesday, September 27, 2017
1. The final grades for students in an introductory statistics were recorded in
HW1.xlsx. Download HW1.xlsx and use it to generate th
Solutions to Quiz 2
Question 1
a) the average spending of holiday shoppers over the Thanksgiving
weekend in 2016
H 0 : $380
H1 : $380
b) Since n 50 30 and is unknown, the t statistic should be used.
c
STAT 3222 Homework 2 (50 marks)
Due: Wednesday, October 11, 2017
1. The average weight of 40 randomly selected minivans is 4150 pounds. The
standard deviation of all minivans is 480 pounds. Estimate t
STAT 3222 Homework 3 (40 marks)
Due: Wednesday, November 1, 2017
1. A market researcher would like to compare the difference in mean salaries
between secondary school teachers and elementary school te
4.
Let the event A that the large shipment item is defective then P(A) = 0.08
Therefore, probability of at least one item defective out of 4 randomly chosen items is: Here n=4, and p= 0.08
P(X 1
= 1
Stat 2225
Summer 2017
Assignment #4 (due July 13) (Total 31 marks)
(Note: Whenever a problem involves analysis of variance, an ANOVA table MUST be included as well as
stating the alternative hypothesi
Stat 2225 Section 1
Summer 2017
Computer Lab 1 (Room C212)
May 18 (Thursday), 11:30am 12:20pm
We have three objectives in our initial computer lab session:
1. Review how to import Excel file.
2. Revie
HYPOTHESIS TESTS FOR MEAN AND PROPORTION
There are many instances in which we wish to make a statement regarding the value of a
population parameter based on sample information. To do this, we employ
CONFIDENCE INTERVAL
Confidence Interval of the Population Mean:
Suppose that as part of an annual review, an insurance company wishes to know the average
age of its policy holders. Since it would take
EXERCISES FOR HYPOTHESIS TESTS FOR MEAN AND PROPORTION
1. A tire manufacturer claims that its tires will last no less than an average of 50,000 km
before they need to be replaced. A consumer group wis
EXERCISES ON CONFIDENCE INTERVAL
1. A sample of 20 patients at a doctor's office reveals an average waiting time of 16 minutes,
and a standard deviation of 5 minutes.
a. What is the point estimate of
EXERCISES ON THE SAMPLING DISTRIBUTION OF X AND
P
1. For each of the following situations, state whether the parameter of interest is the mean or the
proportion.
a. In a survey, one hundred college s
SAMPLING DISTRIBUTIONS
I: Sampling Distribution of the Sample Mean X
Suppose that students' commuting times at a large college, represented by the variable X, have
mean = 29 minutes and standard devia
Simple Regression Exercises
Exercise 1:
The heights of tall buildings in the US (in metres) are related to the number of stories of the
building. (Source: Microsoft Bookshelf). Data on 10 buildings ar