Basic Business Statistics Concepts And Applications 5th Edition L. Berenson Mark, David Levine, Kathryn Szabat, Judith Watson, Nicola Jayne, Martin O'brien - Solutions

Unlock the full potential of "Basic Business Statistics Concepts And Applications 5th Edition" with our comprehensive resources. Access the complete solutions manual and answers key online, featuring step-by-step answers to all questions and solved problems. Explore our solutions PDF for detailed chapter solutions and test bank items, perfect for students and instructors alike. Dive into the instructor manual and textbook solutions for a deeper understanding. All these resources, including free downloads, are designed to provide you with the best tools for mastering business statistics.

The manager of a fast-food restaurant wants to determine the effectiveness of a promotional campaign where ‘20% off’coupons, valid for a month, are widely distributed. The table below records the daily sales (in thousands of dollars) of random samples of 10 days before the campaign and 10 days
An executive of Airline X has taken a quick poll of 30 regular airline passengers. Each passenger was asked to rate the airline they last flew on. The ratings were on a seven-point Likert scale, where 1 5 extremely poor and 7 5 excellent.Of the 30 respondents, 12 last flew on Airline X and the
A builder suspects that the primary supplier of raw materials is overcharging. In order to determine if her suspicion is correct, she contacts a second supplier and asks for the prices on a selection of materials.She wants to compare these prices with those of the primary supplier. The data
A hotel chain has similar 50-room resorts in five locations. The number of rooms occupied in each resort on randomly selected days is given in the table below. < OCCUPANCY >At the 0.10 level of significance, is there evidence to conclude that there is a significant difference in the median
A toy manufacturer is assessing a new, longer-lasting small battery in four popular toys – A, B, C and D – each requiring a single battery. Twenty batteries are randomly assigned to the toys. Then each toy is run continuously and the time to failure of the battery recorded. < BATTERY_LIFE >It
Six Masterchef guest reviewers have given scores out of 10 to four contestants. < MASTERCHEF >
Playing the share market via the Internet has become a popular pastime for many people. Shares tend to be a long-term investment but the power of the Internet allows people to invest and sell quickly on international markets.The following table presents the opening and closing price for 13 selected
Managed funds provide the individual investor with a convenient medium for diversification. The table below lists the level of return over six years for a sample of investors for five different types of fund. < FUND >Determine at the 0.05 significance level if there is any significant difference
Athletics Australia is trying to attract more sports spectators to athletics. It conducts an advertising campaign on sports TV channels to gauge spectator preferences.a. At the 0.10 level of significance, is there evidence of a significant increase in the proportion of respondents who support
A market researcher is interested in studying the effect of advertisements on brand preference of new car buyers. Prospective purchasers of new cars were first asked whether they preferred Ford or Holden and then watched video advertisements of comparable models of the two manufacturers. After
Under what conditions should you use the Friedman rank test?
Under what conditions should you use the Kruskal–Wallis rank test?
Under what conditions should you use the Wilcoxon signed ranks test?
Under what conditions should you use the Wilcoxon rank sum test?
Under what conditions should you use the McNemar test?
The following data compares the prices (in dollars) of staple food items at Woolworths, ALDI, Coles and IGA in< SUPERMARKET >
A student team in a business statistics course designed an experiment to investigate whether the brand of bubblegum used affected the size of bubbles they could blow. The students believed that Kyle was an expert at blowing bubbles, and his expertise might negatively affect the results of a
Nine experts rated four brands of Colombian coffee in a taste-testing experiment. A rating on a seven-point scale(1 5 extremely unpleasing, 7 5 extremely pleasing) is given for each of the following four characteristics: taste, aroma, richness and acidity. The following table displays the summated
For problem 19.42:a. State the decision rule for testing the null hypothesis that all six groups have equal population medians.b. What is your statistical decision if FR 5 11.56?
What is the upper-tail critical value χ2 U when testing for the equality of the medians in six populations using α 5 0.10?
Students in an engineering course performed an experiment to test the strength of four brands of garbage bags. One-kilogram weights were placed into a bag, one at a time, until the bag broke. A total of 40 bags were used (10 for each brand). The data file < TRASH_BAGS > gives the weight (in
Return to problem 11.11. on page 414 regarding sick leave taken for different age groups. At the 0.05 level of significance, is there evidence of a significant difference in the median sick leave taken by different age groups? < SICK_LEAVE >
The retail manager of a supermarket chain wants to determine whether product location has an effect on the sale of pet toys.Three different aisle locations are considered: front, middle and rear. A random sample of 18 stores is selected with six stores randomly assigned to each aisle location. The
An electronics firm is introducing its new smartphone to the market.They make it available in four cities: Sydney, Auckland, Melbourne and Singapore. Daily sales are recorded for the first five days. < SMART >
An industrial psychologist wants to test whether the reaction times of assembly-line workers are equivalent under three different learning methods. From a group of 25 new employees, 9 are randomly assigned to method A, 8 to method B and 8 to method C. After the learning period, the workers are
Using the results of problem 19.35:a. State the decision rule for testing the null hypothesis that all six groups have equal population medians.b. What is your statistical decision if the calculated value of the test statistic H is 13.77?
What is the upper-tail critical value from the chi-square distribution if you use the Kruskal–Wallis rank test for comparing the medians in six populations at the 0.01 level of significance?
Return to problem 10.25. on page 378 regarding petrol prices.< PUBLIC_HOLIDAY >At the 0.01 level of significance, is there evidence that prices are significantly higher on a public holiday(Friday)?
Over the past year the manager for human resources at a large medical centre ran a series of three-month workshops aimed at increasing worker motivation and performance. As a check on the effectiveness of the workshops, she selected a random sample of 35 employees from the personnel files and
Can students save money by buying their textbooks at Amazon.com? To investigate this possibility, a random sample of 15 textbooks used during a recent semester at Tasman University was selected. The prices for these textbooks at a local bookshop and through Amazon.com were recorded. The prices for
The following data compares the prices (in dollars) of a range of food staples between a Coles and a Woolworths supermarket located in Melbourne. < SUPERMARKET >At the 0.01 level of significance, is there evidence that prices are significantly higher at Woolworths than at Coles?
A new type of drink dispensing machine has been installed at refreshment stands at ANZ Stadium. The number of drinks dispensed per hour at each stand was measured before and after the installation of the new machine. < DISPENSE >At the 0.05 level of significance, is there evidence of a significant
For problems 19.27 and 19.28, what is your statistical decision?
For problem 19.27, at a 0.05 level of significance, determine the upper-tail critical value for the Wilcoxon signed ranks test statistic W if you want to test H0: MD ⩽ 0 against H1: MD > 0.
Consider the following n′ 5 12 signed ranks (Ri) calculated from the difference scores (Di) from two related samples:Signed ranks (Ri): +5, +6.5, +4, +11, −8, +2.5, −2.5,+1, +12, +6.5, +10, +9 What is the value of the test statistic W if you are testing H0: MD ⩽ 0?
In problems 19.24 and 19.25, what is your statistical decision?
In problem 19.24, what is the upper-tail critical value for the test statistic W from Table E.9 if the level of significance α is 0.05 and the alternative hypothesis is H1: MD > 0?
Consider the following n 5 12 difference scores from two related samples:Difference scores (Di): +4.8, +1.7, +4.5, −1.2, +11.1, −0.8,+2.3, −2.0, 0.0, +14.8, +7.8, +1.7 What is the value of the test statistic W if you are testing H0: MD ⩽ 0?
Using Table E.9, determine the lower-tail critical value for the Wilcoxon signed ranks test statistic W in each of the following one-tail tests:a. α 5 0.05, n′ 5 11b. α 5 0.025, n′ 5 11c. α 5 0.01, n′ 5 11d. α 5 0.005, n′ 5 11
Using Table E.9, determine the upper-tail critical value for the Wilcoxon signed ranks test statistic W in each of the following one-tail tests:a. α 5 0.05, n′ 5 11b. α 5 0.025, n′ 5 11c. α 5 0.01, n′ 5 11d. α 5 0.005, n′ 5 11
Using Table E.9, determine the lower- and upper-tail critical values for the Wilcoxon signed ranks test statistic W in each of the following two-tail tests:a. α 5 0.10, n′ 5 11b. α 5 0.05, n′ 5 11c. α 5 0.02, n′ 5 11d. α 5 0.01, n′ 5 11
A problem with a telephone line that prevents a customer from receiving or making calls is upsetting to both the customer and the telephone company. The following data< PHONE > represent samples of 20 problems reported to two different offices of a telephone company and the time taken to clear
A bank with a branch located in Pitt Street, Sydney < BANK1 >has developed an improved process for serving customers during the noon to 1 pm lunch period. The waiting time(defined as the time elapsed from when the customer enters the line until they reach the teller window) of all customers during
Return to problem 10.17 on page 370 regarding male and female graduate starting salaries. < STARTING_SALARY >a. Using a 0.05 level of significance, can you conclude that males have a significantly greater starting salary than females?b. What assumptions must you make in (a)?c. Compare your results
The director of training for an electronic equipment manufacturer wants to determine whether different training methods have an effect on the productivity of assembly-line employees. She randomly assigns 42 recently hired employees to two groups of 21. The first group receives a computer-assisted,
A New York television station decides to produce a story comparing two commuter railroads in the area: the Long Island Rail Road(LIRR) and New Jersey Transit (NJT). Data analysts at the television station sample the performance of several scheduled train runs of each railroad, 10 for the LIRR and
A call centre is trying to minimise complaints about its service time. Eighteen employees are randomly split into groups A and B and placed on alternative training courses. The number of complaints for each employee is then recorded over the following month. < COMPLAINTS2 >Group A 2 5 7 3 6 8 5 3 2
In problems 19.12 and 19.13, what is your statistical decision?
From problem 19.12, at a 0.05 level of significance, determine the lower-tail critical value for the Wilcoxon rank sum test statistic T1 if you want to test the null hypothesis H0: M1 ⩾ M2 against the one-tail alternative H1: M1 < M2.
The following information is available for two samples selected from independent and similarly shaped right-skewed populations.Sample 1: n1 5 5 1.1 2.3 2.9 3.6 14.7 Sample 2: n2 5 6 2.8 4.4 4.4 5.2 6.0 18.5a. Replace the observed values with the corresponding ranks(where 1 5 smallest value; n 5 n1
In problems 19.9. and 19.10, what is your statistical decision?
In problem 19.9, what are the lower- and upper-tail critical values for the test statistic T1 from Table E.8 if you use a 0.05 level of significance and the alternative hypothesis is H1: M1 • M2?
The following information is available for two samples selected from independent populations:Sample 1: n1 5 7 Assigned ranks: 4 1 8 2 5 10 11 Sample 2: n2 5 9 Assigned ranks: 7 16 12 9 3 14 13 6 15 What is the value of T1 if you are testing the null hypothesis H0: M1 5 M2?
Using Table E.8, determine the lower-tail critical value for the Wilcoxon rank sum test statistic T1 in each of the following one-tail tests:a. α 5 0.05, n1 5 5, n2 5 9b. α 5 0.025, n1 5 5, n2 5 9c. α 5 0.01, n1 5 5, n2 5 9d. α 5 0.005, n1 5 5, n2 5 9
Using Table E.8, determine the upper-tail critical value for the Wilcoxon rank sum test statistic T1 in each of the following one-tail tests:a. α 5 0.05, n1 5 5, n2 5 9b. α 5 0.025, n1 5 5, n2 5 9c. α 5 0.01, n1 5 5, n2 5 9d. α 5 0.005, n1 5 5, n2 5 9
Using Table E.8, determine the lower- and upper-tail critical values for the Wilcoxon rank sum test statistic T1 in each of the following two-tail tests:a. α 5 0.10, n1 5 5, n2 5 9b. α 5 0.05, n1 5 5, n2 5 9c. α 5 0.01, n1 5 5, n2 5 9d. Given your results in (a) to (c), what do you conclude
The human resources manager of a large department store wants to reduce absenteeism among sales assistants. She decided to institute an incentive plan that provides financial rewards for sales assistants who are absent less than five daysa. At the 0.05 level of significance, is there evidence that
An airline has changed catering suppliers and wishes to gauge whether this has had an influence on customer satisfaction. A random sample of 100 passengers who flew with the airline both last year and this year is selected.a. At the 0.05 level of significance, is there evidence that satisfaction
A taste-testing experiment compared two brands of Barossa Cabernet Sauvignon wines. After the initial comparison, 60 preferred brand A and 40 preferred brand B. The 100 respondents were then exposed to a very professional and powerful advertisement promoting brand A. The 100 respondents were then
Two candidates for prime minister participated in a televised debate. A political pollster recorded the preferences of 200 registered voters in a random sample before and after the debate.a. At the 0.05 level of significance, is there evidence of a significant difference in the proportion of voters
A market researcher wanted to determine whether the proportion of beer drinkers who preferred brand A increased as the result of a change to the brewing technique. A random sample of 200 beer drinkers was selected. The results indicating preference for brand A or brand B prior to the beginning of
The Ashland MultiComm Services (AMS) technical services team has embarked on a quality improvement effort. Its first project relates to maintaining the target upload speed for its Internet service subscribers.Upload speeds are measured on a device that records the results on a standard scale in
A company manufactures stone benchtops. The specified length of one range is 1000 mm ± 2.5 mm.The data in < BENCH > give the length of a sample of five bench tops produced each day during a 30-day period.a. Construct control charts for the range and the mean.b. Is the process in a state of
The manager of a large cosmetics store is monitoring salesstaff performance. The data in < SALES > give the number of sales per week made by a subgroup of five employees over a 30-week period.a. Construct control charts for the range and the mean.b. Is the process in a state of statistical control?
Jay, a rural fire service volunteer, decided to apply control chart methodology, learned in a business statistics class, to data collected by the local brigade. Jay wants to determine whether weeks containing more than the mean number of incidents attended were due to inherent, chance causes of
A customer services manager of Your Phone, a telecommunications company, is monitoring the number of errors made by its offshore call centre processing requests concerning additions, changes and deletions to phone and Internet services. Data were collected over a period of 30 days. < ERROR >a.
(Class project) Use the table of random numbers (Table E.1)to simulate the selection of different coloured balls from an urn as follows:1. Start in the row corresponding to the day of the month you were born plus the year in which you were born. If your total exceeds 100, subtract 100 from the
On each morning during a four-week period, record your pulse rate (in beats per minute) just after you get out of bed and also before you go to sleep at night. Set up X–and R charts and determine whether your pulse rate is in a state of statistical control. Explain.
A branch manager of a brokerage company is concerned with the number of undesirable trades made by her sales staff. A trade is considered undesirable if there is an error on the trade ticket. Trades with errors are cancelled and resubmitted. The cost of correcting errors is billed to the brokerage
The funds-transfer department of a bank is concerned with turnaround time for investigations of funds-transfer payments. A payment may involve the bank as a remitter of funds, a beneficiary of funds or an intermediary in the payment. An investigation is initiated by a payment inquiry or query by a
A large introductory statistics unit has as part of the continuous assessment four online tests, each worth 5% of the final mark.Each online test consists of 10 multiple-choice questions randomly selected from a large question pool for the corresponding topics, and is available for a fortnight. As
A producer of cat food constructed control charts and analysed several quality characteristics. One characteristic of interest is the weight of the filled cans. The lower specification limit for weight is 1.48 kg. The data file < CAT_FOOD > contains the weights of five cans tested every 15 minutes
Why is a capability analysis not performed on out-of-control processes?
A company requires a Cpk value of 1 or larger. If a process has a Cp = 1.5 and a Cpk = 0.8, what changes should you make to the process?
What is the difference between process potential and process performance?
How do you decide if you should use a p chart or a c chart?
What principles did you learn from the red bead experiment?
Why are the X–and R charts used together?
What is the difference between attribute control charts and variables control charts?
Under what circumstances do you use a p chart?
What should you do to improve a process when only commoncause variation is present?
What should you do to improve a process when special-cause variation is present?
What is the difference between common-cause variation and special-cause variation?
Refer to problem 18.20 on page 726 concerning waiting time for customers at a bank. Suppose management has set an upper specification limit of 5 minutes on waiting time and that at least 99% of the waiting times must be less than 5 minutes in order for the process to be considered capable.<
on page 727 concerning a filling machine for a tea-bag manufacturer. In this problem you should have concluded that the process is in control. The label weight for this product is 5.5 g, the lower specification limit is 5.2 g, and the upper specification limit is 5.8 g.Company policy states that at
Refer to problem
data on page 726 concerning the tensile strengths of nylon fibre ropes. There is no upper specification limit for tensile strength, and the lower specification limit is 550. < ROPE >a. Estimate the percentage of ropes within specifications.b. Calculate CPL and Cpk.
Refer to the problem
data < SPRING_WATER > on page 726, suppose one of the critical-to-quality (CTQ) variables is the amount of magnesium, measured in mg/L, in the water.The LSL and USL for the level of magnesium in a bottle are 1.5 mg/L and 1.7 mg/L respectively.a. Estimate the percentage of bottles within
Referring to the problem
For an in-control process with subgroup data n = 3, X= = 100 and R– = 3.386, calculate the Cp, CPL, CPU and Cpk if:a. LSL = 98 and USL = 102b. LSL = 93 and USL = 107.5
and there is no USLd. USL = 110 and there is no LSL
For an in-control process with subgroup data n = 3, X= = 100 and R– = 3.386, calculate the percentage of outcomes within specifications if:a. LSL = 98 and USL = 102b. LSL = 93 and USL = 107.5c. LSL =
For an in-control process with subgroup data n = 4, X= = 20 and R– = 2, find the estimate of:a. the population mean of all X valuesb. the population standard deviation of all X values
A manufacturing company makes brackets for bookshelves.The brackets provide critical structural support and must have a 90-degree bend ±1 degree. Measurements of the bend of the brackets were taken at 18 different times. Five brackets were sampled at each time. The data are in the file < ANGLE
A filling machine for a tea-bag manufacturer produces approximately 170 tea-bags per minute. The process manager monitors the weight of the tea placed in individual bags. A subgroup of n = 4 tea-bags is taken every 15 minutes for 25 consecutive time periods. The results are given below: < TEA3 >a.
The director of radiology at a large metropolitan hospital is concerned about scheduling in the radiology facilities. On a typical day, 250 patients are transported to the radiology department for treatment or diagnostic procedures. If patients do not reach the radiology unit at their scheduled
The data in the file < ROPE > are the tensile strengths in megapascals (mPa) of nylon fibre ropes. The data were collected in subgroups of three over a 24-hour manufacturing period.a. Construct a control chart for the range.b. Construct a control chart for the mean.c. Is the process in a state of
A supplier of ‘natural Australian’ spring water states that the magnesium content is 1.6 mg/L. To check this during the bottling operation, the quality control department takes a random sample of four bottles each hour and calculates the magnesium content. The data in < SPRING_WATER >represent
The call centre supervisor of the IT helpdesk at a large university is monitoring the performance of the technical support staff. The data in the file < HELP_DESK > give the number of calls resolved during each 8-hour shift (8 am to 4 pm, Monday to Friday) by each of a subgroup of five support

Showing 1 - 100 of 2900

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Last

Basic Business Statistics Concepts And Applications 5th Edition L. Berenson Mark, David Levine, Kathryn Szabat, Judith Watson, Nicola Jayne, Martin O'brien - Solutions

Step by Step Answers