Exercise9.1
InferencesfromTwoProportions
Solvethefollowing:
A student of the author surveyed her friends and found that among 20 males, 4 smoke and among
30 female friends, 6 smoke. Give two reasons why these results should not be used for a
hypothesis te
MA3110: Week 6 Exercise 2
Computing Z-Score
Compute your own z-score for your height using the formula:
Sample
Population
Z=
Z=
If mean height for men is 69.6 inches, with a standard deviation of 2.8 inches:
1. Find the probability that a person will have
MA3110: Week 5 Exercise
Determining Discrete Probability Distributions
Solve the following:
1. In the table below, the random variable x represents the number of cups or cans of caffeinated beverages consumed by
Americans each day based on data from the N
MA3110: Week 6 Exercise 1
Calculating Standard Normal Probability Distribution
Solve the following:
1. Assume that the thermometer readings are normally distributed with a mean of 0 C and a standard deviation of 1.00 C. A
thermometer is randomly selected
MA3110: Week 9 Exercise 2
Solve the following:
1. Refer to the sample data given below:
The mean tar content of a simple random sample of 25 unfiltered king-size cigarettes is 21.1 mg, with a standard
deviation of 3.2 mg. The mean tar content of a simple
MA3110: Week 10 Exercise
Linear Correlation
In this assignment, you should solve four questions, where you will be asked to calculate a linear correlation coefficient and determine whether
there is a linear correlation between the two given variables.
Sol
1. reject the null hypothesis
2.data set A and data set B have the same strengths in linear correlation
3. each population must have a normal distribution
4. line of the best fit
5. scatter plot
6. there is sufficient evidence to reject the claim u1 = u2
Numbers Sort
6
2
9
4
3
1
Sum
1
2
3
4
6
9
7
4
12
8
9
10
Was not clear as to which paired data wanting to be summed. I took the original numbers
that were given, then sorted them, and then found the sum of those.
Sum
14
12
10
8
6
4
2
0
Sum
0
1
2
3
4
5
6
7
8
Exercise 2.1
Summarizing and Graphing Data
1. Identify class width, class midpoints, and class boundaries for the given frequency distribution:
Tar (mg) in Filtered Cigarettes
Frequency
2-5
6-9
10-13
14-17
2
2
6
15
Class Width: 4 - This was found by the a
MA3110: Week 4 Exercise
Finding Probability
Solve the following:
1. Refer to the sample data given below:
Results from Experiments with Polygraph Instruments
Did the Subject Actually Lie?
No (Did Not Lie)
Positive test result
15
(Polygraph test indicated
Exercise 3.1
Calculating Measures of Center
Solve the following:
1. When the Indianapolis Colts recently won the Super Bowl, the numbers on the jerseys of the active players were 29, 41, 50, 58,
79, 10 (listed in alphabetical order of the players names).