Question

Asked Sep 15, 2019

16 views

IQ scores have a bell-shaped distribution with a mean of 100 and a standard deviation of 15.

a. What percentage of IQ scores are between 55 and 145?

b. What two IQ scores have 68% of the IQ scores between them?

Step 1

Given Data

Mean = 100

Standard Deviation = 15

Step 2

Let X denote the IQ score

a) percentage of IQ scores are between 55 and 145

Step 3

b) two IQ scores have 68% of the IQ scores between are

As per the empirical rule 68% i...

Tagged in

Find answers to questions asked by student like you

Show more Q&A

Q: 2. | Ecology: Habitat Wetlands offer a diversity of benefits. They provi habitat for wildlife, spawn...

A: Stem-and-leaf plot:A graphical representation of the quantitative data in which each data entry is s...

Q: What is the appropriate level of measure (Nominal, Ordinal, Interval or ratio) for: A)Your age 1...

A: In this context, an individual’s age is given in an order.Levels of measurement: Nominal measurement...

Q: It is difficult to conduct sample surveys on sensitive issues because many people will not answer qu...

A: Tree diagram:It is a graphical representation of all the possible outcomes of an event. Each branch ...

Q: Companies who design furniture for elementary school classrooms produce a variety of sizes for kids ...

A: Given DataMean = 39.2Standard Deviation = 1.9In this question sample size n is not given, for solvi...

Q: Personal care aid is an occupation that is growing quickly. Assume that, in a certain region there w...

A: Given information:The number of personal care aids in 2024 is 157,500, which is a growth of 28% over...

Q: How hot does it get in Death Valley? The following data are taken from a study conducted by the Nati...

A: It provided that the sample size of ground temperature (n) is 14.Consider X is defined as the ground...

Q: (1) Let x be the age in years of a licensed automobile driver. Let y be the percentage of all fatal ...

A: Hello. Since you have posted multiple questions and not specified which question needs to be solved,...

Q: Can someone explain x-bar to me?

A: Here, it is given that we have to define what is x-bar.

Q: Statistics Question

A: Consider the provided equation: