Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Does familiarity with neighbors lead to lower crime rates? A researcher has theorized that if neighbors know each other, then the crime rates will be lower than in communities in which neighbors do not have a relationship. When communities grow quickly the closeness of the community degrades. A study was done to see if there is a relationship between the crime rate and the percentage change in neighborhood population. 10 neighborhoods in a large metropolis were studied. The results are as follows.
Percentage Change in Neighborhood Population
29
2
11
17
7
6
51
13
19
Crime Rate (Crime per 1000 population)
173
35
132
127
69
53
223
104
99
45
1. Identify the Explanatory (X) and Response (Y) variable.
2. Find Persons Correlation Coefficient and determine if there exists a significant linear relationship.
3. Make a scatter plot of the data. Does the scatter plot support the decision from problem 2?
4. Find the Least Squares Regression Line for the data.
5. What percentage of variation in the crime rate that is explained by the linear relationship between the crime rate and the percentage of change in neighborhood population? (Hint: Coefficient of Determination)
6. Use the least squares regression line to predict the crime rate for a neighborhood with a change in population of 45 percent.
suppose you have a normal distribution of values with a mean of 70 and a standard deviation of 4.5. find the
which is a value often used for the upper limit of the range of normal values. What do the results suggest about the sample group?
The following data show samples of three chain stores in three different locations in one town and the amount of dollars spent per customer per visit. At the 0.05 level, is there a difference in among the means?
Which of the following models are appropriate to forecast a time series whose amplitude increases over time?
a business major wants to determine whether the variation in advertising costs of hair salons is different from the
The 46 computer mice inspectors at a particular factory can only inspect 45 mice per hour. Does the company have reason to believe that these inspectors are slower than average at α = 0.10?
an article in ad hoc networks discussed an underwater acoustic sensor network to monitor a given area in an ocean. the
Would it be unusual for a return with income of $100,000 or more to be audited? What is the probability that two randomly selected returns with income of $100,000 or more will not be audited?
What is the logic behind using the sum of the products of deviation scores as the numerator of the formula for the correlation coefficient? Is this logic sound?
Using test data on 20 types of laundry detergent, an analyst fitted a regression to predict CostPerLoad (average cost per load in cents per load) using binary predictors.
you are designing a freezer that requires the production r-134a with t30 degrees c and a quality of 40. the feed
americans have become increasingly concerned about the rising cost of medicare. in 1990 the average annual medicare
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd