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2020 Workshop Room 2 - Shared screen with speaker view
Julius Ngwa
12:06
One Chapter Each Day that we meet
Julius Ngwa
12:30
Statistical Questions
Julius Ngwa
12:39
1 Hour 30 Minutes
Julius Ngwa
12:57
Recorded
Julius Ngwa
13:12
sla@franklin.edu
Julius Ngwa
13:22
Copy of the Recordings
Jeffery Hay
13:56
Yes
Julius Ngwa
14:21
Empirical Rule
Julius Ngwa
14:29
68% of Data
Julius Ngwa
14:36
95% of Data
Julius Ngwa
14:42
99.7% of the Data
Julius Ngwa
14:50
Calculator
Julius Ngwa
15:23
Statistics Test Scores
Julius Ngwa
16:08
75 and 85
Julius Ngwa
16:22
P(75 < X < 85) = 68%
Julius Ngwa
16:31
2nd VARS
Julius Ngwa
17:47
0.6826
Julius Ngwa
17:54
68.26%
Julius Ngwa
18:00
68%
Julius Ngwa
19:00
2nd VARS
Julius Ngwa
19:12
normalcdf(70, 90, 80, 5)
Julius Ngwa
19:44
0.9544
Julius Ngwa
19:49
95.44%
Julius Ngwa
19:53
95%
Julius Ngwa
20:29
Value on the Normal Distribution
Julius Ngwa
21:15
Mensa is an organization whose membership is limited to people whose IQ is in the top 2% of the population. Assume that scores on an IQ test are normally distributed with mean 𝜇 = 100 and standard deviation σ = 15. What is the minimum score needed to qualify for membership in Mensa?
Julius Ngwa
22:10
IQ Score to be in the Top 2%
Julius Ngwa
22:43
Given the Percentage and we are told to find the Actual Value
Julius Ngwa
22:50
Invnorm
Julius Ngwa
22:56
Syntax
Julius Ngwa
23:09
Area to the left of that Value
Julius Ngwa
23:47
2nd VARS
Julius Ngwa
24:42
130.81
Julius Ngwa
24:47
Top 2%
Julius Ngwa
28:00
A study reported that the length of pregnancy from conception to birth is approximately normally distributed with mean 𝜇 = 272 days and standard deviation σ = 9 days. What proportion of pregnancies last longer than 280 days?
Julius Ngwa
28:47
Question: What Proportion
Julius Ngwa
32:36
0.1870 = 18.70%
Julius Ngwa
36:53
Two Categorical Data
Julius Ngwa
37:07
Contingency Table
Julius Ngwa
38:58
Relationship between Gender and Smoking Status
Julius Ngwa
39:49
2 x 3 Table (2 x 3 Matrix)
Julius Ngwa
39:59
Chi-square
Julius Ngwa
40:08
Matrix on your Calculator
Julius Ngwa
40:13
20 30 50
Julius Ngwa
40:18
15 35 50
Julius Ngwa
40:48
2nd X-1
Julius Ngwa
40:56
Matrix
Julius Ngwa
41:11
EDIT
Julius Ngwa
41:23
2 X 3 Matrix
Julius Ngwa
42:02
STAT
Julius Ngwa
42:10
TESTS
Julius Ngwa
42:29
X-square Test (Chi-square Test)
Julius Ngwa
43:03
Two Values
Julius Ngwa
43:19
Chi-square Value = 1.099
Julius Ngwa
43:27
P-value = 0.5777
Julius Ngwa
43:43
P-value is below 0.05 (There is a Relationship)
Julius Ngwa
44:08
Gender and Smoking Status based on our Data
Julius Ngwa
45:03
Hours of Studying Per Week x Major
Julius Ngwa
45:23
There is any relationship between Hours of Study and Major
Julius Ngwa
45:48
3 Rows x 4 Columns
Julius Ngwa
45:52
3 x 4 Matrix
Julius Ngwa
46:02
68 106 131 40
Julius Ngwa
46:11
119 103 127 81
Julius Ngwa
46:18
70 52 51 52
Julius Ngwa
46:38
2nd X-1
Julius Ngwa
46:45
EDIT
Julius Ngwa
47:38
Observed {A]
Julius Ngwa
47:45
STAT
Julius Ngwa
47:51
TESTS
Julius Ngwa
48:27
Chi-square Value = 34.638
Julius Ngwa
48:45
p = 5.06E-6 = .00000506
Julius Ngwa
49:00
p-value is below 5% (0.05)
Julius Ngwa
49:17
There is a relationship between the hours of Study and Major
Julius Ngwa
49:23
Chi-square Tests
Julius Ngwa
49:30
Value and p-value
Julius Ngwa
49:36
Draw Inference
Julius Ngwa
50:08
Confidence Intervals
Julius Ngwa
51:18
Confident that The Governor's Ratings
Julius Ngwa
51:53
Estimate = 48%
Julius Ngwa
52:04
Confident (43%, 53%)
Julius Ngwa
52:27
How confident one is (Level of Confidence)
Julius Ngwa
54:10
Confidence interval for Proportion
Julius Ngwa
54:14
Three Values
Julius Ngwa
54:21
x =1300
Julius Ngwa
54:26
n = 2500
Julius Ngwa
54:34
Confidence Level = 95%
Julius Ngwa
54:58
STAT
Julius Ngwa
55:04
TESTS
Julius Ngwa
55:13
1 PROP Z INTERVAL
Julius Ngwa
55:28
A) Confidence interval for Proportion
Julius Ngwa
56:19
Estimate = 0.52 = 52%
Julius Ngwa
56:54
Confidence Interval (.5004, .5396)
Julius Ngwa
57:17
(50.04%, 53.96%)
Julius Ngwa
59:10
In a survey of 517 music teachers, 403 said that the video games Guitar Hero and Rock Band have a positive effect on music education. Construct a 95% confidence interval for the proportion of music teachers who believe that these video games have a positive effect.
Julius Ngwa
01:00:43
STAT
Julius Ngwa
01:00:46
TESTS
Julius Ngwa
01:01:00
A: 1 Prop Z Interval
Julius Ngwa
01:01:48
Estimate = 77.95%
Julius Ngwa
01:02:11
(74.38%, 81.52%)
Julius Ngwa
01:02:21
Estimate and Confidence Interval
Julius Ngwa
01:02:38
Confidence Interval for the Mean
Julius Ngwa
01:03:20
A machine that fills cereal boxes is supposed to put 20 ounces of cereal in each box. A simple random sample of 6 boxes is found to contain a sample mean of 20.25 ounces of cereal. It is known from past experience that the fill weights are normally distributed with a standard deviation of 0.2 ounce. Construct a 90% confidence interval for the mean fill weight.
Julius Ngwa
01:05:20
Not Proportion But Mean
Julius Ngwa
01:05:36
Z Interval
Julius Ngwa
01:05:38
STAT
Julius Ngwa
01:05:40
TESTS
Julius Ngwa
01:06:00
Z interval (For Mean and Population Standard Deviation)
Julius Ngwa
01:06:25
STAT
Julius Ngwa
01:06:27
TESTS
Julius Ngwa
01:06:37
7: Z Interval
Julius Ngwa
01:06:51
Stats is highlighted
Julius Ngwa
01:07:46
Estimate = 20.25
Julius Ngwa
01:08:04
Confidence Interval (20.12, 20.38) 90% Confdent
Julius Ngwa
01:08:32
Slightly higher than expected
Julius Ngwa
01:09:20
Scatter Diagram
Julius Ngwa
01:09:28
Two Continuous Variables
Julius Ngwa
01:10:35
Relationship between Size of the House and the Selling Price of the House
Julius Ngwa
01:10:49
Scatter Diagram
Julius Ngwa
01:11:31
As the Size of the House is increasing the Price of the House is also increasing
Julius Ngwa
01:11:41
Scatter Diagram
Julius Ngwa
01:12:01
STAT
Julius Ngwa
01:12:11
Press Enter (Edit)
Julius Ngwa
01:12:20
L1: Size
Julius Ngwa
01:12:25
L2: Price
Julius Ngwa
01:14:00
2nd Y =
Julius Ngwa
01:14:08
STAT PLOTS
Julius Ngwa
01:14:24
OFF
Julius Ngwa
01:15:25
Type Scattterplot
Julius Ngwa
01:15:50
ZOOM
Julius Ngwa
01:16:10
ZOOM STAT
Julius Ngwa
01:16:24
Scatterdiagram
Julius Ngwa
01:16:33
L1 - SIZE
Julius Ngwa
01:16:41
L2 - Selling Pice of the House
Julius Ngwa
01:18:13
Graphs
Julius Ngwa
01:18:18
STAT PLOT
Julius Ngwa
01:18:23
Box plot
Julius Ngwa
01:18:30
Size of the House
Julius Ngwa
01:19:08
Boxplot Just one list is requred
Julius Ngwa
01:19:46
2nd 2
Julius Ngwa
01:21:26
STAT
Julius Ngwa
01:21:33
TESTS
Julius Ngwa
01:22:31
What Test am I applying
Julius Ngwa
01:22:38
What Confidence Interval to Generate
Julius Ngwa
01:23:03
1 VAR STAT
Julius Ngwa
01:23:25
Linreg(ax +b ) Scatter Diagrams
Julius Ngwa
01:24:07
Setup the Editor L1 to L6
Julius Ngwa
01:24:16
STAT
Julius Ngwa
01:24:25
SetUpEditor
Julius Ngwa
01:24:35
All the Lists
Julius Ngwa
01:25:12
Done
Julius Ngwa
01:25:52
2nd VARS
Julius Ngwa
01:26:04
normalcdf
Julius Ngwa
01:26:08
Invnorm
Julius Ngwa
01:26:15
Normal Distribution
Julius Ngwa
01:26:34
binomialpdf
Julius Ngwa
01:26:39
binomialcdf
Julius Ngwa
01:26:41
2nd VARS
Julius Ngwa
01:26:51
2nd STAT
Julius Ngwa
01:27:01
MATH
Julius Ngwa
01:27:44
1 VAR STAT
Julius Ngwa
01:28:01
Catalog
Julius Ngwa
01:28:05
2nd 0
Julius Ngwa
01:28:16
ALL FUNCTIONS
Julius Ngwa
01:28:28
Mathematical Functions
Julius Ngwa
01:29:51
https://www.surveymonkey.com/r/Advanced_TI_83_84_Stats_Part_2_SP20