Question

# of text messages sent yesterday

3 8 3 18 2 1 8 1 6 13 15 14 13 9 20 12 5 9 18 18 13 2 7 6 0 0 11 12 4 13 1 19 4 12 4 11 8 18 1 15 12 6 6 12 19 12 20 12 8 12

Test the following claim:

70% of individuals that send text messages send less than 10 messages per day, α = 0.01

Answer #1

Cassie and Amir are trying to control the number of text
messages they send. They record the number they send every day in
April.
Cassie:
22, 21, 24, 20, 31, 19, 13, 23, 16, 12, 17, 15, 14, 11, 8, 24,
19, 14, 19, 27, 22, 26, 25, 20, 24,
I 8, 28, 12, 18, 22
Amir: 12, 8, 9, 3, 2, 12, 33, 28, 32, 28, 29, 13, 16, 14, 30,
26, 31, 32, 32, 13, 16, 26, 18,...

The stem and leaf plot shows a set of data regarding the number
of text messages sent and received per day by a group of college
students.
0
2 6 7
1
2 2 6
2
2 4 4 5
3
1 9 9 9
4
0
5
6
1
What is the mode of the distribution?
Based on this data, how many students send and receive 39 or
more text messages per day?
a.
10
b.
5
c.
4...

Let S = { 1 , 2 , 3 , ... , 18 , 19 , 20 }
S = { 1 , 2 , 3 , ... , 18 , 19 , 20 } be the universal set. Let
sets A and B be subsets of S , where: Set A = { 4 , 6 , 10 , 11 ,
12 , 15 , 16 , 18 , 19 , 20 }
Set B = { 1 ,...

Cork price: 16 10 15 10 17 11 14 13 11 14 11 16 18 16 10 17 14
14 16 7 10 12 19 15 16 14 9 12 21 13 10 16 12 16 13 17 17 13 14 18
11 12 15 16 13 18 16 17 12 12 14 9 11 14 19 13 11 17 11 13 15 14 18
18 18 12 10 11 13 14 11 14 18 13 13 19 17 14...

Cork price: 16 10 15 10 17 11 14 13 11 14 11 16 18 16 10 17 14
14 16 7 10 12 19 15 16 14 9 12 21 13 10 16 12 16 13 17 17 13 14 18
11 12 15 16 13 18 16 17 12 12 14 9 11 14 19 13 11 17 11 13 15 14 18
18 18 12 10 11 13 14 11 14 18 13 13 19 17 14...

The stem and leaf plot shows a set of data regarding the number
of text messages sent and received per day by a group of college
students.Find the median and explain what it means in the context
of the problem. Write a detailed sentence.
0
2 6 7
1
2 2 6
2
2 4 4 5
3
1 9 9 9
4
0
5
6
1

Consider the following time series data.
Week
1
2
3
4
5
6
Value
18
13
15
12
16
14
c)Use α = 0.2 to compute the exponential smoothing
forecasts for the time series.
Week
Time Series
Value
Forecast
1
18
2
13
18
3
15
4
12
5
16
6
14
Compute MSE. (Round your answer to two decimal places.)
MSE =____
What is the forecast for week 7? (Round your answer to two
decimal places.)
____
(e)Use a...

A survey of 1000 drivers found that 29% of the people send text
messages while driving. Last year, a survey of 1000 drivers found
that 17% of those sent text messages while driving.
1.) Give a 95% confidence interval for the increase in text
messaging while driving.
2.) At α = .0 5 , can we conclude that there has been an
increase in the number of drivers who text while driving? State the
hypotheses, find the test statistic,...

Find variance of the following stocks A,B and C:
Stock
A
B
C
1
3
19
-2
2
5
17
4
3
7
15
0
4
9
13
8
5
11
11
12
6
13
9
14
8
15
7
-8
9
17
5
16
10
19
3
20

Plant sizes get larger as you move from ATC-1 to ATC-4. Output
ATC-1 ATC-2 ATC-3 ATC-4 1,500 $10 15 $20 $30 2,000 8 12 17 25 2,500
9 10 15 20 3,000 12 8 13 18 3,500 15 6 11 16 4,000 18 10 9 14 4,500
20 12 7 12 5,000 24 15 11 10 5,500 29 19 13 8 6,000 35 25 15 9 In
the long run, the firm should use plant size ATC-4 for what level...

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