Calculator Notes (9.3)
Your TI-83/84 calculator will find the proportion for you. You will need only the values for x, n
and the level of confidence. Access the STATS menu by pressing [STAT]. Then scroll over to
TESTS and down to 1-PropZInt. Press [ENTER]
Course
CHAPTER
Question 1
Construct a boxplot for the given data. Include values of the 5-number summary in all
boxplots.
A
The ages of the 35 members of a track and field team are listed below. Construct a boxplot for
the data set.
15 16 18 18 18 19 20
2
Question 1
Provide an appropriate response.
0 / 1 point
A card is drawn from a standard deck of 52 playing cards. Find the probability that the card is a an ace or
a king.
a)
b)
c)
d)
ComplementRuleProb1053
Question 2
0 / 1 point
A county welfare agency e
Question 1
0 / 1 point
The probability that a randomly selected individual in a country earns more than $75,000 a year is 6.5%.
The probability that a randomly selected individual earns more than $75,000 a year given that they have
earned a bachelor's deg
Question 1
Provide an appropriate response.
1 / 1 point
A private opinion poll is conducted for a politician to determine what proportion of the population
favors adding more national parks. How large a sample is needed in order to be 99% confident that t
HypTest1
Question 1
Provide an appropriate response.
1 / 1 point
Suppose you are using = 0.01 to test the claim that > 38 using a P-value. You are given the sample
statistics
and
Find the P-value.
a) 0.1030
b) 0.9960
c) 0.0041
d) 0.0211
Question 2
1 / 1 p
MATH250
CHAPTER 1 AND 2
Question 1
A
B
Classify the following random variable according to whether it is discrete or
continuous.
The number of cups of coffee sold in a cafeteria during lunch
continuous
discrete
Question 2
Find the original data from the s
Week 1 Notes
This week we cover Chapter 1 and Chapter 2. Each week, we will provide these lecture notes
that offer an overview of what is important in the sections covered during the week and more
importantly, calculator short cuts that will end up saving
Week 2 Notes
In Chapter 3, we summarize the data by looking at some specific measures. Instructions to find
the mean and median using the TI-83/84 can be found on p. 130 and below. You can find a TIcalculator specific guidebook at http:/education.ti.com/u
Section 5.1 Probability Rules
We will be making extensive use of fractions, decimals, and percents in this chapter. If you
need a review of these concepts, take a moment to do it now either in a previous textbook or
look up an online tutorial. I will give
Week 6 Notes
Section 9.1 The Logic in Constructing Confidence Intervals about a Population Mean
At the beginning of chapter 9, we discuss confidence intervals. Until now, we only had point
estimates to use when we tried to analyze data statistically. Basi
Week 7 Notes
Chapter 10 Notes
Chapter 10 is the culmination of all of your hard work this session. We are going to use the
statistical methods we have learned so far to test the validity of claims (called hypothesis
testing).
Section 10.1 The Language of
Chapter 2 Example, similar to #36 in section 2.2
The following data represent the number of customers waiting for a table at 6:00 PM for 40
consecutive Saturdays at Bobaks Restaurant:
11
8
4
10
6
4
8
10
6
3
13
5
8
14
4
10
5
6
9
7
7
10
11
7
11
6
8
13
11
5
Calculator Notes (9.2)
Finding a t-confidence interval is nearly the same as finding a z-interval. From the STATS ->
TESTS menu, scroll down to the 8th entry: TInterval and press [ENTER]. Once again, we have
the option to use raw data entered into a list
Calculator Notes (Section 3.1)
Of course, we want to be able to compute statistical values efficiently on the calculator. To do
that, we need to enter the data into a list where it will be stored until we delete it. This is handy
because often we need to
Calculator Notes (Section 3.2)
So, how do we calculate these statistics? You have actually already learned how to calculate
them on the calculator. Once you have entered your data into lists and click on 1-Var Stats,
you can use your down arrow to find th
Calculator Notes (Section 3.3)
Grouped Data Example:
Listed below is a grouped frequency distribution for 30 business executives. Find the mean from
the grouped frequency distribution.
To enter the data in the calculator, we will enter the midpoint values
Calculator Notes (6.1)
Example 5 p. 296
We are given the probability distribution in Table 3 on p. 296. We will go to Stat, Edit, and then
put 0, 1, 2, and 3 into L1. Then, using your right arrow key, put 0.01, 0.10, 0.38, and 0.51 into
L2. Now, we will u
Calculator Notes (6.2)
Example 2, p. 306
First, I determine that the success in this problem is blood type O-negative and that the probability of this is
0.07. I am selecting four people. So, my n = 4, p = 0.07, and X will be the number of success that co
Calculator Notes (7.1)
Calculating Z-Values
Remember to use parentheses on your TI when calculating z-values. For example, to calculate
the Z-value for the x value of 35 with a mean of 38.72 and a standard deviation of 3.17, you will
enter (35 38.72) / 3.
Calculator Notes (7.2)
Check out the youtube video on the calculator usage and try that before you follow these notes.
http:/www.youtube.com/watch?v=9N0F4IHong4&feature=channel
Problem: Find the area under the standard normal curve that lies to the left o
Calculator Notes (7.3)
We go through each example in the textbook with technology so you can see how much quicker
it is than using the tables.
Example 1, p. 349
Draw picture like Figure 35 on p. 350. You may use ShadeNorm(0, 38, 38.72, 3.17). We dont
need
Calculator Notes (7.4)
Look at the data in problem #9. We would start by entering the data into list 1 in the calculator.
Press [2nd] [y =] to access the [StatPlot] area. You should see
Make sure that 1: is highlighted and press [ENTER]. Highlight ON and
Calculator Notes (8.1)
The normalcdf command is again used in section 8.1, but we will be using the standard error of the
mean in place of the standard deviation in problems involving the Central Limit Theorem.
For example, the scores on the PDI, a scale
Calculator Notes (8.2)
In this section, you will be using normalcdf again to calculate probabilities. We will be using the fact that
mean of the sampling distribution of is p, and the standard deviation of the sampling distribution of
is
. (see p. 396)
Calculator Notes (9.1)
We need to know FOUR quantities:
, x , n and the level of confidence you want.
NOTE:
must be known and the population must be Normally distributed (or n > 30 )! On
the calculator, press the [STAT] key to access the statistics menu,
Calculator Notes (4.1)
In section 4.1, you will not be asked to compute r, the correlation coefficient, by hand. Just to be
very clear, you are not required to compute this value by hand. Use your TI-83/84 calculator to
compute the value of r. We expect y