Answered: Identify whether the numbers are…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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1. Identify whether the numbers are statistics or parameters.
a. Of all US third grade teachers, 32% say that knowing cursive writing is an essential skill.
b. Of the 500 US third grade teachers polled, 34% say that knowing cursive writing is an essential skill.

2. The body temperature of a healthy adult follows a Normal distribution with a mean of 98.25°F and a standard deviation of 0.73°F.
a. Find the probability that a randomly selected adult will have a body temperature between 98°F and 99°F.
b. Find the mean and standard deviation of the sampling distribution of the mean body temperature for an SRS of 50 adults.
c. Find the probability that the mean body temperature of an SRS of 50 adults is between 98°F and 99°F.

3. Why is the standard deviation of a sampling distribution smaller than the standard deviation of the population?

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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Identify whether the numbers are statistics or parameters. a. Of all US third grade teachers, 32% say that knowing cursive writing is an essential skill. b. Of the 500 US third grade teachers polled, 34% say that knowing cursive writing is an essential skill.