Use the Normal model (10016) describing IQ scores to answer the following. a) What percent of people's IQs are expected to be over 85? b) What percent of people's IQs are expected to be under 90? c) What percent of people's IQs are expected to be between 116 and 124? a) Approximately % of people's IQs are expected to be above 85. (Round to one decimal place as needed.) b) Approximately % of people's IQs are expected to be below 90. (Round to one decimal place as needed.) c) Approximately % of people's IQs are expected to be between 116 and 124. (Round to one decimal place as needed.)

There are 15 numbers on a list, and the smallest number is changed from 4 to 0.4.a) Is it possible to determine by how much the mean changes? If so, by how much does it change?b) Is it possible to determine the value of the mean after the change? If so, what is the value?c) Is it possible to determine by how much the median changes? If so, by how much does it change?d) Is it possible to determine by how much the standard deviation changes? If so, by how much does it change

A survey of 2,510 golfers showed that 311 of them are​ left-handed. Find a point estimate for​ p, the population proportion of golfers that are​ left-handed.     A. 0.11   B. 0.124   C. 0.141   D. 0.876

In a city with three high schools, all the ninth graders took a Standardized Test, with these results: Number of ninth graders (Frequency) Mean Test Score High School Glenwood 82 262 Central 92 311 Lincoln 67 168 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was the average of 82, 92, and 67, whic incorrect. What is the mean score for all ninth graders in the city? Round to one decimal place 80.3. Of course, that is Mean of all ninth grader's scores *

Use the histogram below to answer the following question: A) What percent of people scored in the 20s

The average grade for a group of students in a statistics exam was 85 points, with a standarddeviation of 3 points.a. What proportion of students have at least 80 points on the exam? b. What proportion of students have less than 80 points on the exam?

A group of students were surveyed about the number of siblings they have. Their responses are summarized in the frequency table below. How many students responded to the survey? Number of Siblings Frequency 0 6 1 8 2 5 3 3 4 1 5 or more 3