A random sample of n, 16 communities in western Kansas gave the following information for people under 25 years of age.x Rate of hay fever per 1000 population for people under 2599 92 122 129 91 123 112 93125 95 125 117 97 122 127 88A random sample of n, 14 regions in western Kansas gave the following information for people over 50 years old.X3i Rate of hay fever per 1000 population for people over 5097 108 102 9s 110 88 11079 115 100 89 114 85 96A USE SALT(1) Use a calculator to calculate XS Kg, and sa: (Round your answers to four decimal places.)(H) Assume that the hay fever rate in each age group has an approximately normal distribution. Do the data indicate that the age group over 50 has a lower rate of hayfever? Use a 0.05.(a) What is the level of significance?

In order to determine whether the mean rate of hay fever for over 50 years old is less than that for…

Answered: A random sample of n, 16 communities in…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

An investigator analyzed the leading digits from 791 checks issued by seven suspect companies. The frequencies were found to be 5, 13, 5, 68, 273, 358, 5, 23, and 41, and those digits correspond to the leading digits of 1, 2, 3, 4, 5, 6, 7, 8, and 9, respectively. If the observed frequencies are substantially different from the frequencies expected with Benford's law shown below, the check amounts appear to result from fraud. Use a 0.01 significance level to test for goodness-of-fit with Benford's law. Does it appear that the checks are the result of fraud? Leading Digit Actual Frequency Benford's Law: Distribution of Leading Digits 1 3 4 5 6 7 8 9 13 5 68 273 358 5 23 41 30.1% 17.6% 12.5% 9.7% 7.9% 6.7% 5.8% 5.1% 4.6% Determine the null and alternative hypotheses. Но At least one leading digit has a frequency that does not conform to Benford's law. The leading digits are from a population that conforms to Benford's law. At least two leading digits have frequencies that do not conform…
20-21. The test scores of 10 randomly selected students are listed below. Find the median. 30 35 43 44 47 48 54 55 57 59 O A. 47 О в 48 O C. 47.5 O D. 48.5
Consider the data in the table below which was collected from a random sample of 20 vendors at a local open market during the first week after the lockdown period: Vendor Number of years in operation Daily income (N$) 1 > 5 years 1555 2 5 years 1790 6. Between 1 and 5 years 1660 7 5 years 1950 9. Between 1 and 5 years 2240 10 > 5 years 1811 11 Between 1 and 5 years 1904 12 > 5 years 2209 13 5 years 2010 15 Between 1 and 5 years 2300 16 Between 1 and 5 years 300 17 5 years 662 19 Between 1 and 5 years 1444 20 <1 year 755 Required: Construct a cross-tabulation between the random variables Daily Income and Number of years in Operation and provide an interpretation.
An amusement park keeps track of the percentage of individuals with season passes according to age category. An independent tourist company would like to show that this distribution of age category for individuals buying season passes is different from what the amusement park claims. The tourist company randomly sampled 200 individuals entering the park with a season pass and recorded the number of individuals within each age category. Age Category Child (under 13 years old) Teen (13 to 19 years old) Adult (20 to 55 years old) Senior (56 years old and over) Number of Individuals 56 86 44 14 The tourist company will use the data to test the amusement park’s claim, which is reflected in the following null hypothesis. H0:pchild=0.23H0:pchild=0.23, pteen=0.45pteen=0.45, padult=0.20padult=0.20, and psenior=0.12psenior=0.12. What inference procedure will the company use to investigate whether or not the distribution of age category for individuals with season passes is…
A national nursing organization is lobbying congress for sunding to hire more nurses nationwide. One of the arguments is that nurses, on average, work significantly longer than full time duty, assuming full time is 40 hours a week. A sample of n=9 nurses had the following work hours last week: 43, 45,48,41,45,50,50,53,48 Calculate the mean length of work hours for the sample.
A random sample of n1 = 16 communities in western Kansas gave the following information for people under 25 years of age. x1: Rate of hay fever per 1000 population for people under 25 97 91 122 130 94 123 112 93 125 95 125 117 97 122 127 88 A random sample of n2 = 14 regions in western Kansas gave the following information for people over 50 years old. x2: Rate of hay fever per 1000 population for people over 50 94 111 100 95 110 88 110 79 115 100 89 114 85 96 What is the value of the sample test statistic? (Test the difference μ1 − μ2. Round your answer to three decimal places.)
A random sample of 25 Berkeley College students was asked, “How many hours per week typically do you work outside the home?” Their responses were as follows: {0, 0, 15, 20, 30, 40, 30, 20, 35, 35, 28, 15, 20, 25, 25, 30, 5, 10, 30, 24, 28, 30, 35, 15, 15} a. Find the mean, the median and the mode of hours worked outside the home for the sample data. Show all your work to justify your answer. b. Use the above data to complete the following table summarizing the number of hours worked outside the home. Express the relative frequency as a percent. Class Tally Frequency Relative Frequency 0-10 11-20 21-30 31-40 Total c. Find the five-number summary of the hours worked outside of the home by the 25 Berkeley College students.
In a school, a test has been conducted in seven subjects and the marks of four students have been recorded in a table as shown below: Student-1 Student-2 Student-3 Student-4 99 96 97 97 99 93 87 90 92 99 91 86 92 92 90 91 88 97 99 96 95 91 96 91 99 85 86 93 Apply one-way ANOVA and check whether there is any significant difference among the three student scores or not
Lower Upper f cf rf crf 14 19 10 10 0.2 0.2 20 25 11 21 0.22 0.42 26 31 8 29 0.16 0.58 32 37 6. 35 0.12 0.7 38 43 15 50 0.3 1 The frequency table shown above shows ages from a random sample of 50 people. a. How many people are between 20 and 25 years of age? b. How many people are 25 years old or younger? c. How many people are older than 25? d. What percent of people are 25 years old or younger? Enter a whole number. cor e. What percent of people are between 20 and 25 years of age? Enter a whole number. Submit Question Jump to Answer MacBook Air O00 O00 F4 11 F8 F2 F3 F5 F6 F7 F9 %23 24 & * 3 4. 8. 9- E RI 6
20. Draw a histogram for the following distribution and find 4 model wage and check the value by direct calculation Wages (in Rs.) 10-15 15-20 20-25 25-30 30-35 35-40 40-45 : No. of workers 60 140 110 150 12 100 90 :
A random survey is collected on the number of children of different age groups who play in government parks and the information is tabulated in the frequency distribution given below: Age (years) Number of children 1 - 2 8 2 - 4 10 4 - 7 18 7 - 9 10 9 - 11 12 11 -15 6…
A random sample of n1 = 16 communities in western Kansas gave the following information for people under 25 years of age. x1: Rate of hay fever per 1000 population for people under 25 100 92 122 127 93 123 112 93 125 95 125 117 97 122 127 88 A random sample of n2 = 14 regions in western Kansas gave the following information for people over 50 years old. x2: Rate of hay fever per 1000 population for people over 50 93 112 100 97 111 88 110 79 115 100 89 114 85 96 State the null and alternate hypotheses. H0: ?1 = ?2; H1: ?1 ≠ ?2 H0: ?1 > ?2; H1: ?1 = ?2 H0: ?1 = ?2; H1: ?1 > ?2 H0: ?1 = ?2; H1: ?1 < ?2 What sampling distribution will you use? What assumptions are you making? The standard normal. We assume that both population distributions are approximately normal with known standard deviations. The Student's t. We assume that both population distributions are approximately normal with known standard deviations. The Student's t. We assume that…

Recommended textbooks for you

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

Elementary Statistics: Picturing the World (7th E…

Statistics

ISBN:

9780134683416

Author:

Ron Larson, Betsy Farber

Publisher:

PEARSON

The Basic Practice of Statistics

Statistics

ISBN:

9781319042578

Author:

David S. Moore, William I. Notz, Michael A. Fligner

Publisher:

W. H. Freeman

Introduction to the Practice of Statistics

Statistics

ISBN:

9781319013387

Author:

David S. Moore, George P. McCabe, Bruce A. Craig

Publisher:

W. H. Freeman

SEE MORE TEXTBOOKS