Introductory Statistics
1st Edition
ISBN: 9781938168208
Author: Barbara Illowsky, Susan Dean
Publisher: OpenStax College
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Textbook Question
Chapter 5, Problem 31P
Use the following information to answer the next eight exercises. A distribution is given as X ~U(0, 12).
Draw the graph of the distribution for P(x >9).
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The amount of time a service technician needs to change the oil in a car is uniformly distributed between 11 and 21 minutes. Let X = the time needed to change the oil on a car.
b. Graph the distribution and find P (x > 19). Round to the nearest tenth.
A research firm claims that the distribution of the days of the week that people are most likely to order food for delivery is different from the distribution
shown in the pie chart. You randomly select 496 people and record which day of the week each is most likely to order food for delivery. The table to the right
shows the results. At a = 0.10, test the research firm's claim.
Day
Frequency, f
42
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
11
24
W Click the icon for the pie chart of the distribution.
49
47
165
158
State Ho and H, and identify the claim.
Họ: The distribution of the days people order food for delivery is as shown in the pie chart.
Ha: The distribution of the days people order food for delivery differs from the expected distribution.
Which hypothesis is the claim?
o Ho
Calculate the test statistic.
X = 25.425 (Round to three decimal places as needed.)
Determine the P-value.
P= 0.000 (Round to three decimal places as needed.)
Decide whether to reject or fail…
refer to the table attached.
What is P(Z > 2.22)?
Chapter 5 Solutions
Introductory Statistics
Ch. 5 - Consider the function f(x)=18 for 0x8 0. Draw the...Ch. 5 - The data the follow are the number of passengers...Ch. 5 - A distribution is given as X ~U(0, 20). What is...Ch. 5 - The total duration of baseball games in the major...Ch. 5 - Suppose the time it takes a student to finish a...Ch. 5 - The amount of time a service technician needs to...Ch. 5 - The amount of time spouses shop for anniversary...Ch. 5 - The number of days ahead travelers purchase their...Ch. 5 - On average, a pair of running shoes can last 18...Ch. 5 - Suppose that the distance, in miles, that people...
Ch. 5 - Suppose that on a certain stretch of highway, cars...Ch. 5 - Suppose that the longevity of a light bulb is...Ch. 5 - In a small city the number of automobile accidents...Ch. 5 - Which type of distribution does the graph...Ch. 5 - Which type of distribution does the graph...Ch. 5 - Which type of distribution does the graph...Ch. 5 - What does the shaded area represent? P(_< x <_)...Ch. 5 - What does the shaded area represent? P(______...Ch. 5 - For a continuous probablity distribution, 0x15 ....Ch. 5 - What is the area under f(x) if the function is a...Ch. 5 - For a continuous probability distribution, 0x10 ....Ch. 5 - A continuous probability function is restricted to...Ch. 5 - f(x) for a continuous probability function is 15 ,...Ch. 5 - f(x) , a continuous probability function, is equal...Ch. 5 - Find the probability that x falls in the shaded...Ch. 5 - Find the probability that x falls in the shaded...Ch. 5 - Find the probability that x falls in the shaded...Ch. 5 - m:math display='block'>f(x), a continuous...Ch. 5 - Use the following information to answer the next...Ch. 5 - Use the following information to answer the next...Ch. 5 - Use the following information to answer the next...Ch. 5 - Use the following information to answer the next...Ch. 5 - Use the following information to answer the next...Ch. 5 - Use the following information to answer the next...Ch. 5 - the following information to answer the next ten...Ch. 5 - 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Use the following information to answer the next...Ch. 5 - Use the following information to answer the next...Ch. 5 - Use the following information to answer the next...Ch. 5 - Use the following information to answer the next...Ch. 5 - Use the following information to answer the next...Ch. 5 - Use the following information to answer the next...Ch. 5 - Use the following information to answer the next...Ch. 5 - Use the following information to answer the next...Ch. 5 - Use the following information to answer the next...Ch. 5 - Use the following information to answer the next...Ch. 5 - Use the following information to answer the next...Ch. 5 - Use the following information to answer the next...Ch. 5 - Use the following information to answer the net 16...Ch. 5 - Use the following information to answer the net 16...Ch. 5 - Use the following information to answer the net 16...Ch. 5 - For each probability and percentile problem, draw...Ch. 5 - For each probability and percentile problem, draw...Ch. 5 - For each probability and percentile problem, draw...Ch. 5 - For each probability and percentile problem, draw...Ch. 5 - For each probability and percentile problem, draw...Ch. 5 - For each probability and percentile problem, draw...Ch. 5 - For each probability and percentile problem, draw...Ch. 5 - Use the following information o answer the next...Ch. 5 - Use the following information o answer the next...Ch. 5 - Use the following information o answer the next...Ch. 5 - The time (In minutes) until the next bus departs a...Ch. 5 - Suppose that the value of a stock varies each day...Ch. 5 - A fireworks show is designed so that the time...Ch. 5 - The number of miles driven by a truck driver falls...Ch. 5 - Suppose that the length of long distance phone...Ch. 5 - Suppose that the useful life of a particular car...Ch. 5 - The percent of persons (ages five and older) in...Ch. 5 - The time (In years) after reaching age 60 that ft...Ch. 5 - The cost of all maintenance for a car during fts...Ch. 5 - Use the following information to answer the next...Ch. 5 - Use the following information to answer the next...Ch. 5 - Use the following information to answer the next...Ch. 5 - Let X ~ Exp(0.l). a. decay rate = _________ b. ...Ch. 5 - Suppose that the longevity of a light bulb is...Ch. 5 - At a 911 call center, calls come in a an average...Ch. 5 - In major league baseball, a no-hitter is a game in...Ch. 5 - During the years 1998—2012. a total of 29...Ch. 5 - According to the American Red Cross. about one out...Ch. 5 - A web site experiences traffic during normal...Ch. 5 - At an urgent care faci11t; patients arrive at an...
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- For the following exercises, draw a best-fit line for the plotted data.arrow_forwardA research firm claims that the distribution of the days of the week that people are most likely to order food for delivery is different from the distribution shown in the pie chart. You randomly select 493 people and record which day of the week each is most likely to order food for delivery. The table to the right shows the results. At a = 0.01, test the research firm's claim. Day Frequency, f 47 Sunday Monday Tuesday Wednesday Thursday Friday Saturday 15 27 W Click the icon for the pie chart of the distribution. 49 41 164 150 State Ho and H, and identify the claim. Graph/Chart Ho: The distribution of the days people order food for delivery H: The distribution of the days people order food for delivery Food at your door I Sunday 8% Which hypothesis is the claim? I Monday 3% O Ho O Tuesday 6% O H. O Wednesday 14% I Thursday 11% Calculate the test statistic. I Friday 36% X = (Round to three decimal places as needed.) I Saturday 22% Determine the P-value. P= (Round to three decimal…arrow_forwardd. find-t50,.01. Draw the distribution and locate the t-value (-t50,.01) in the distribution. e. find X²0,05. Draw the distribution and locate the x²-value (x20,05) in the distribution. f. find F2,20,.05. Draw the distribution and locate the F-value (F2,20,05) in the distribution.arrow_forward
- A pediatrician wants to determine the relation that exists between a child's height, x, and head circumference, y. She randomly selects 11 children from her practice, measures their heights and head circumferences, and obtains the accompanying data. Complete parts (a) through (g) below.arrow_forwardfind P(W>1).arrow_forward
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