Transcript survey results - Hatboro-Horsham School District

#1
Find the mean, median and
mode
12, 16, 22, 45, 30, 58, 11, 21,
29, 37
#2
Make a Box and
Whisker Plot
12, 73, 11, 96, 45, 21,
16, 98, 13
#3
410 people in the state of Oregon were surveyed
about their choice for official state animal. Review
the results. Do we have convincing evidence that
one of these two animals would win a state-wide
election?
SURVEY RESULTS:
Moose: 234
Deer: 176
#4
Find the IQR and identify
any possible outliers
15, 57, 77, 66, 53, 72, 51,
88, 82, 70, 112, 107, 69,
88, 155, 98, 65
Read the following survey summaries. Discuss
which of the surveys contain bias, and consider
ways to rewrite either survey.
• To measure people’s interest in spending tax
dollars to build a community pool in Horsham,
people are invited to participate in an online
survey.
• To determine if Hatboro residents are interested
in building a Monorail over York road, 200
residents are randomly selected, and a pollster
sent to their house.
#5
#6
Find the standard
deviation
and the mean 52, 61, 54,
48, 72
#7
Can you determine a group of 5 numbers that has
the following characteristics?
•
•
•
•
The mean is 54
The mode is 56
The range is 6
The median is 55
#8
Find the class mean
Score
Freq
50-59
2
60-69
3
70-79
7
80-89
5
90-99
3
#9
Make a Box and
Whisker Plot
22, 50, 78, 22, 77, 93,
27, 86, 14
The times in which students at HH can hold their
breath are normally distributed, with mean 90
#10
seconds, and standard deviation 15 seconds.
Out of 1900 students, About
how many students can hold
their breath for more than 1
minute?
#11
A student used the set of data and table below to
compute a standard deviation. Can you spot the
mistakes she made? The mean of the data set is
31, and the median is 30.
x
27
28
29
31
35
36
xx
( x  x) 2
3
2
1
1
5
6
9
4
1
1
25
36
From my table, I found
that the variance of this
data is 76, and the
standard deviation is 8.7
#12
In a poll of 435 HH students,
275 of them said they approve
of the no iPod rule. Find the
sample proportion, the margin
of error and the true interval.
#13
What type of survey is
taken by ordering the
population in some way
and then selecting
members at regular
intervals?
#14
Identify the bias in this
survey:
Mr. Evans wants to know
how many students will go to
the Dec. Dance, so he talks
th
to students in the library 4
period.
#15
In a survey of 400 people, 212 say
they would be in favor of raising
taxes to pay for a new library,
while 184 say they would not. Is
this enough evidence to say that
the general public will support the
library?
#16
What type of survey is this:
To determine the theme for the
winter dance, the student council
divides the school into the four
grade levels, and then randomly
selects 20 people from each
grade level.
#17
The scores to Mr. L’s final exam are
normally distributed, with a mean
score of 85, and a standard deviation
of 2 points. About what percentage of
the students have scores above 89?
About what percentage have scores
between 81 and 87?
#18
On a box of cereal, the weight is
listed as 12 ounces and the
manufacturer has determined the
standard deviation is 0.1 ounces.
How many boxes of cereal out of
5000 will be within 0.1 ounces of
12 ounces?
#19
On a test, the mean score was an 80
with a standard deviation of 10.
What is the probability of getting a
score greater than 86?
#20
On a test, the mean score was an 80
with a standard deviation of 10.
What is the probability of getting a
score between 76 and 88?
#21
On a test, the mean score was an 80
with a standard deviation of 10.
If 300 people took the test, about
how many should be expected to
make below a 68?
The box and whisker compares the amount of
money spent by males and females at their last
visit to the hair salon. Write a few sentences
which compare the spending of the two genders
Box Plot
Collection 1
Gender
M
Males:
Mean: $16
Std. Dev: $3
Females:
Mean: 27
Std. Dev: $4.50
F
#22
10
15
20
25
30
HairCost
35
40
45
50
#23
Use class mean to estimate the mean
height of Black Cherry Trees.
#24
Write comparative statements for the side
by side box & whisker.