18. According to a recent report, people smile an average of μ = 62 times per day. Assuming that the distribution of smiles is approximately normal with a standard deviation of σ = 18, find each of the following values. a. What proportion of people smiles more than 80 times a day? b. What proportion of people smiles at least 50 times a day? 190 chaPTER 6 | Probability Copyright 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the Gravetter, Frederick J. Statistics for The Behavioral Sciences (p. 190). Cengage Learning. Kindle Edition.

18. According to a recent report, people smile an average of μ = 62 times per day. Assuming that the distribution of smiles is approximately normal with a standard deviation of σ = 18, find each of the following values. a. What proportion of people smiles more than 80 times a day? b. What proportion of people smiles at least 50 times a day? 190 chaPTER 6 | Probability Copyright 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the Gravetter, Frederick J. Statistics for The Behavioral Sciences (p. 190). Cengage Learning. Kindle Edition.

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...

See similar textbooks

Similar questions

Based on the hourly incomes (in US dollars) of employees in two different branches at Citibank, which set of incomes has the most variability? You do not have to calculate anything, but you can if you want to. Just take a look at the incomes and determine which set has the most variability based on the definition.
Use the Central Limit Theorem to find the mean and standard error of the mean of the sampling distribution. Then sketch a graph of the sampling distribution. The mean price of photo printers on a website is $227 with a standard deviation of $58. Random samples of size 22 are drawn from this population and the mean of each sample is determined. Question content area bottom Part 1 The mean of the distribution of sample means is enter your response here . Part 2 The standard deviation of the distribution of sample means is enter your response here . (Type an integer or decimal rounded to three decimal places as needed.) Part 3 Sketch a graph of the sampling distribution. Choose the correct answer below. A. 224 227 230Mean price (in $) x A bell shaped curve is over a horizontal x overbar axis labeled Mean price (in dollars) from 224 to 230 in increments of 1 and is centered on 227. B. -3 0 3Mean…
Chapter 2, Section 3, Exercise 078 9,12,15,18,19,21,25,27,28,32,34 Using StatKey or other technology, find the following values for the above data.Click here to access StatKey.(a) The mean and the standard deviation.Round your answers to one decimal place.mean =standard deviation =(b) The five number summary.Enter exact answers.The five number summary is (, , , , )
K Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15. Click to view page 1 of the table. Click to view page 2 of the table. G H The indicated IQ score, x, is (Round to one decimal place as needed.) Copyright ©2022 Pearson Education Inc. All rights reserved. Terms of Use | Privacy Policy Permissions 6 H U hp + ... 8 9 P 83°F 0.9 = Next Contact Us insert Ca 4 prt sc
None
C, D, E, F
Please give solution in correct and step by step detailed format thanku 1. The weights of extra-large eggs are normally distributed with a mean of 1 ounce and a standard deviation of 0.1 ounce. What is the probability that a carton of a dozen eggs weighs more than 13 ounces? A. 0.1814 B 0.0000 C 0.0019 D 0.2033
For a specific year. Americans spent an average of $52 for ice cream. The amount spent is normally distributed and the standard deviation is $7.50. Find the probability that a randomly American spent more than $47 per year on ice cream. Show work. __________ If 1200 Americans were randomly selected, about how many would you expect to have spent less than $47 per year on ice cream? Show your work. ________
z Scores LeBron James, one of the most successful basketball players of all time, has a height of 6 feet 8 inches, or 203 cm. Based on statistics from Data Set 1 “Body Data” in Appendix B, his height converts to the z score of 4.07. How many standard deviations is his height above the mean?
K A survey found that women's heights are normally distributed with mean 63.4 in and standard deviation 2.5 in. A branch of the military requires women's heights to be between 58 in and 80 in. a. Find the percentage of women meeting the height requirement. Are many women being denied the opportunity to join this branch of the military because they are too short or too tall? b. If this branch of the military changes the height requirements so that all women are eligible except the shortest 1% and the tallest 2%, what are the new height requirements? Click to view page 1 of the table. Click to view page 2 of the table. correct: 1 C... a. The percentage of women who meet the height requirement is (Round to two decimal places as needed.)
6