The data table contains waiting times of customers at a bank, where customers enter a single waiting line that feeds three teller windows. Test the claim that the standard deviation of waiting times is less than 2.3 minutes, which is the standard deviation ofwaiting times at the same bank when separate waiting lines are used at each teller window. Use a significance level of 0.025. Complete parts (a) through (d) below.E Click on the icon to view the data.a. Identify the null and alternative hypotheses. Choose the correct answer below.O A. Ho: 0 = 2.3 minutesO B. Ho: o<2.3 minutesHA: 0= 2.3 minutesHA: 0+ 2.3 minutesO C. Ho: o= 2.3 minutesO D. Ho: 02 2.3 minutesHA: o< 2.3 minutesHA: o<2.3 minutesb. Compute the test statistic.(Round to two decimal places as needed.)c. Find the P-value of the test statistic.The P-value of the test statistic is(Round to three decimal places as needed.)d. Does the use of the single line appear to reduce the variation among waiting times?Therev sufficient evidence to conclude that the single line reduced the variation among waiting times because Ho isvby the hypothesis test. Customer Waiting TimesCustomer Waiting Times(in minutes)6.66.46.47.37.46.67.77.37.26.96.37.46.76.912.86.67.47.514.57.36.37.46.611.87.86.56.37.86.87.57.47.57.714.87.68.27.56.78.87.76.86.713.87.17.86.78.96.24.27.56.17.66.76.46.87.77.36.26.27.3

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Answered: The data table contains waiting times…

Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015

1st Edition

ISBN:9781680331141

Author:HOUGHTON MIFFLIN HARCOURT

Publisher:HOUGHTON MIFFLIN HARCOURT

Chapter11: Data Analysis And Displays

Section11.3: Shapes Of Distributions

Problem 4Q

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Consider the following data. Calculate mean and standard deviation for each test (can you see it is test-retest situation?). Then find the regression equation of Final scores on Midterm scores. Predict the final scores for two students • For one who received 72 on Midterm • For one who received 90 on Midterm Draw a scatterplot Comment how the regression effect manifest itself here. and the regression line; mark the two points (for x=72 and x=90).
The distribution of course grades in a very large class is (approximately) Normal with mean 48 and standard deviation 14. The minimum possible grade is 0 and the maximum possible grade is 120. A grade of 90 or more is required to get "A+". The course instructor is considering the possibility of a "bell curve" that will increase the mean grade to 77 and decrease the standard deviation to 6. What is the proportion of students that will get "A+" if the bell curve is applied?
State Unemployment Rate(Previous Year) Unemployment Rate(Current Year) Alabama 6.8 6.1 Alaska 6.9 6.5 Arizona 6.8 6.1 Arkansas 6.0 5.0 California 7.5 6.2 Colorado 5.0 3.9 Connecticut 6.6 5.7 Delaware 5.7 4.9 Florida 6.3 5.5 Georgia 7.1 6.0 Hawaii 4.4 3.6 Idaho 4.8 4.2 Illinois 7.1 6.0 Indiana 6.0 4.8 Iowa 4.2 3.8 Kansas 4.5 4.2 Kentucky 6.5 5.3 Louisiana 6.4 6.3 Maine 5.6 4.4 Maryland 5.8 5.1 Massachusetts 5.7 4.8 Michigan 7.2 5.4 Minnesota 4.2 3.7 Mississippi 7.5 6.4 Missouri 6.1 5.0 Montana 4.7 4.2 Nebraska 3.3 3.0 Nevada 7.9 6.8 New Hampshire 4.3 3.4 New Jersey 6.8 5.8 New Mexico 6.7 6.5 New York 6.3 5.3 North Carolina 6.3 5.7 North Dakota 2.7 2.8 Ohio 5.8 4.9 Oklahoma 4.5 4.4 Oregon 6.8 5.6 Pennsylvania 5.9 5.3 Rhode Island 7.7 6.0 South Carolina 6.5 6.0 South Dakota 3.4 3.1 Tennessee 6.6 5.6 Texas 5.1 4.4 Utah 3.8 3.6 Vermont 3.9 3.6 Virginia 5.2 4.5 Washington 6.1 5.6 West Virginia 6.6…
The number of countries shown in this bar chart where the rate of rapes is below 10 for every 100,000 is Rape at the national level, number of police-recorded 70 offences (rate/100,000)- United nations (2012) 60 50 40 30 20 10 66.5 34.1 33.0 29.8 29.6 27.6 Jamaica Bolivia Sweden 26.6 24.9 22.3 Belgium USA 18.7 Costa Rica 1.7 1.6 1.5 Finland Source: United nations office on drugs and crime "CTS2013 SexualViolence.xls" 1.4 Hong Kong Slovakia Norway 1.0 0.9 8. 0.9 0.7 Japan UAE Greece 18 Canada Serbia 10 Indonesia New Zealand Brazil
Valid Missing Total 59.9% Freshman Sophomore Junior Senior Total System 96.1% 243 55.9% Class rank Frequency Percent 33.8 22.1 22.5 14.9 93.3 6.7 100.0 147 96 98 65 406 29 435 Consider the following frequency table of class rank among 435 college students. What is the valid cumulative percentage of students in this sample that are identified as either Freshmen or Sophomore? Valid Percent 36.2 23.6 24.1 16.0 100.0 Cumulative Percent 36.2 59.9 84.0 100.0
A man runs 1 mile approximately once per weekend. He records his time over an 18-week period. The individual times and summary statistics are given in Table 2.14. WK Time (min)(xi ) WK Time (min)(xi ) 1 12.80 10 11.57 2 12.20 11 11.73 3 12.25 12 12.67 4 12.18 13 11.92 5 11.53 14 11.67 6 12.47 15 11.80 7 12.30 16 12.33 8 12.08 17 12.55 9 11.72 18 11.83 2.8 What is the mean 1 mile running time over 18 weeks? 2.9 What is standard deviation of the 1 mile running time over 18 weeks? 2.12 Suppose the man does not run for 6 months over the winter due to snow on the ground. He resumes running once a week in the spring and records a running time = 12.97 minutes in his first week of running in the spring. ls this an outlying value relative to the distribution of running times recorded the previous year in Table 2.14? Why or why not?
Program Per-Year Tuition ($) / Mean Starting Salary Upon Graduation ($)65,028 153,10868,882 152,64766,427 145,53568,299 141,71665,493 138,89966,663 155,51465,232 149,25368,670 150,84163,973 133,81961,996 145,81867,714 146,80761,139 147,07660,836 141,65357,270 140,26255,157 122,91654,127 116,71355,480 126,08652,808 127,11753,414 129,22949,587 122,17045,738 111,27746,552 111,11949,982 110,67345,091 108,29238,565 77,95948,642 82,78947,604 101,57249,252 78,46939,510 87,78632,884 74,47344,782 75,43442,554 54,54750,301 64,97835,013 101,61823,004 55,03040,819 80,37137,604 53,428
What Percentage of deaths occurred after 2006?
The table below shows the amount, in inches, of annual rainfall in a sample of towns. Rainfall Frequency (inches) 2.95- 6. 4.97 4.97- 7 6.99 6.99- 15 9.01 9.01- 8 11.03 11.03- 13.05 9. 13.05- 15.07 What percentage of these towns received between 4.97 and 11.03 inches of annual rainfall? Enter your answer as a percentage but without the percent symbol. Use two-decimal place accuracy, if necessary. MacBook Air
Year Change_Over_Five_Days Change_For_Entire_Year1 0.2 -0.22 0.2 -0.13 0.2 1.84 -0.4 1.25 -0.1 -0.36 0.2 -0.67 -0.1 0.88 -0.9 1.89 0.2 -0.710 0.1 -1.011 0.2 -1.0
Please help me answer this, I have pasted the data set below. 0.82.14.00.30.10.20.50.71.20.20.10.50.40.71.40.50.90.62.50.31.41.31.11.30.20.61.11.61.60.21.00.20.80.40.30.10.20.40.20.20.22.70.41.20.00.20.21.20.20.70.50.20.11.30.20.30.20.50.50.30.90.60.20.00.10.30.21.00.20.10.41.32.50.31.20.61.50.40.30.40.60.30.10.40.60.90.60.20.12.40.30.70.10.61.00.90.40.11.01.00.90.30.20.80.20.60.00.80.92.31.40.80.60.80.20.20.20.10.20.22.50.10.20.41.31.80.01.10.00.10.10.51.72.10.70.53.20.40.50.10.50.10.64.80.10.60.51.31.70.30.11.10.50.80.00.40.31.31.10.20.22.50.70.60.41.52.51.22.10.00.71.10.70.50.10.30.80.11.10.52.10.21.00.91.00.30.00.40.22.20.22.11.20.60.21.00.31.50.30.3
What is the cumulative relative frequency for 2006? Explain what the number tells you about the data

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