An agency collects demographics concerning the number of people in families per household in a certain country. Assume thedistribution of the number of people per household is as shown in the table to the right.a. Calculate the expected number of people in families per household in the country.b. Compute the standard deviation of the number of people in families per household.a. The expected number of people in families per household is(Type an integer or a decimal.)b. The standard deviation of the number of people in families per household is(Type an integer or decimal rounded to four decimal places as needed.)XW N234567P(x)0.260.230.290.140.040.04n

Given table X P(X) 2 0.26 3 0.23 4 0.29 5 0.14 6 0.04 7 0.04 (a) The expected…

Answered: tribution of the number of people per…

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

myopenmath.com The following table shows the number of people that are either 18, 19, 20 or 21 years old, from a sample of 269 people. a) Complete the table. Age 18 19 20 21 Number of people 61 72 59 (b Find the mean for this sample. Give your answer to at least 2 decimal places. (c Find the standard deviation for this sample. Give your answer to at least 2 decimal places. Question Help:Written Example Message instructor Submit Question Jump to Answer
K Use the body temperatures, in degrees Fahrenheit, listed in the accompanying table. The range of the data is 3.6°F. Use the range rule of thumb to estimate the value of the standard deviation. Compare the result to the actual standard deviation of the data rounded to two decimal places, 0.67°F, assuming the goal is to approximate the standard deviation within 0.2°F. Click the icon to view the table of body temperatures. The estimated standard deviation is F. (Round to two decimal places as needed.) Data table ... 98.5 98.2 98.6 98.4 98.8 98.9 99.1 98.6 97.8 97.6 98.4 98.8 97.1 98.1 98.4 98.3 97.5 98.7 99 96.9 97.1 99.2 98 98.9 97.5 99.2 98.3 99.2 97.9 97.7 98.6 98.2 97.2 98.1 97.8 96.8 97.4 98.3 99.9 98.8 99 98.4 98.8 98.6 98 6.8 98.6 98 98.4 98.2 97.6 98.1 97.6 97.1 99 98.1 97.6 99.2 96.3 97.3 97.9 96.9 97.6 97.6 97.5 97.9 98.3 98.5 98.4 98.3 98 7.6 97.5 97.9 98.3 99.3 98.1 98.9 98.1 98.1 98.6 98.2 99 98.8 97.9 98.2 98.4 98.8 98 98.7 97.3 98.1 99.4 97.9 97.9 98.7 98.3 98.3 97.2 97.9…
pr The lengths of pregnancies are normally distributed with a mean of 269 days and a standard deviation of 15 days. a. Find the probability of a pregnancy lasting 308 days or longer. b. If the length of pregnancy is in the lowest 4%, then the baby is premature. Find the length that separates premature babies from those who are not premature. /2 pr Click to view page 1 of the table. Click to view page 2 of the table. /2 a. The probability that a pregnancy will last 308 days or longer is (Round to four decimal places as needed.) pr b. Babies who are born on or before 12 days are considered premature. (Round to the nearest integer as needed.) /2 12 uc /2 12 or /2 or (2 Enter your answer in each of the answer boxes.
QUEST A set of final examination grades in a calculus course was found to be normally distributed with a mean of 69 and a standard deviation of 9. The top 15% of the students taking the test scored will receive a grade of B. What is the cur score?
Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 71 miles per hour, with a standard deviation of 5 miles per hour. Estimate the percent of vehicles whose speeds are between 61 miles per hour and 81 miles per hour. (Assume the data set has a bell-shaped distribution.) Approximately ________ % of vehicles travel between 61 miles per hour and 81 miles per hour.
Determine whether the statement is true or false. If it is false, rewrite it as a true statement. As the size of a sample increases, the standard deviation of the distribution of sample means increases. Choose the correct choice below. C OA. This statement is false. A true statement is, "As the size of a sample increases, the standard deviation of the distribution of sample means decreases." OB. This statement is true. OC. This statement is false. A true statement is, "As the size of a sample decreases, the standard deviation of the distribution of sample means decreases." OD. This statement is false. A true statement is, "As the size of a sample increases, the standard deviation of the distribution of sample means does not change." Time Remaining: 01:26:37
A survey was conducted to determine the amount of time, on average, during a given week SCAD students spend outside of class on class work (projects, homework, and studying). The data shows: 5, 7, 11, 14, 18, 22 (in hours). Calculate the standard deviation by using the appropriate formula. Round your answer to three decimal places.
Gabriel and Lucia took a road trip across the country. The room costs, in dollars, for their overnight stays are listed in the accompanying table. Find the standard deviation of the distribution. Click the icon to view the room costs in dollars. The standard deviation of the distribution is $. (Type an integer or a decimal. Round to the nearest cent as needed.) Room Costs ($) 95 100 116 168 188 179 107 250 131 130 114 265 0 X

Recommended textbooks for you

A First Course in Probability (10th Edition)

Probability

ISBN:

9780134753119

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability

Probability

ISBN:

9780321794772

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability (10th Edition)

Probability

ISBN:

9780134753119

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability

Probability

ISBN:

9780321794772

Author:

Sheldon Ross

Publisher:

PEARSON

SEE MORE TEXTBOOKS