Questions from Statistics

Q: When we refer to a “normal” distribution, does the

When we refer to a “normal” distribution, does the word normal have the same meaning as it does in ordinary usage? Explain.

Q: The graph in Figure 3.21 shows home prices in different

The graph in Figure 3.21 shows home prices in different regions of the United States. a. Describe general trends that apply to the home price data for all regions. b. Describe any differences that you...

Q: You want to determine the average (mean) number of robocalls

You want to determine the average (mean) number of robocalls received each day by adults in Alaska. • Sample 1: The 537 adults in Alaska who respond to a survey published in a newspaper • Sample 2:...

Q: Draw a rough sketch of a normal distribution. Do all normal

Draw a rough sketch of a normal distribution. Do all normal distributions look the same?

Q: What does the area under the normal distribution curve represent? What

What does the area under the normal distribution curve represent? What is the total area under the normal distribution curve?

Q: Briefly describe the four conditions under which we can expect a data

Briefly describe the four conditions under which we can expect a data set to have a nearly normal distribution. Give an example of a set of data that might be approximated by the normal distribution....

Q: My height puts me in the 37th percentile for my gender,

My height puts me in the 37th percentile for my gender, which means my height has a negative standard score.

Q: My good grades are a result of the fact that the number

My good grades are a result of the fact that the number of hours I study each week put me in the 90th percentile for study time.

Q: I found the standard score of the data value, even though

I found the standard score of the data value, even though I do not know the standard deviation of the data set.

Q: A test of depth perception is designed so that scores are normally

A test of depth perception is designed so that scores are normally distributed with a mean of 50 and a standard deviation of 10. Use the 68-95-99.7 rule to find the following values. a. Percentage of...