Please find the z-score for Center A and Center B. Thank you.

A researcher desires to know whether the typing speed of a secretary (in words per minute) is related to the time (in hours) that it takes the secretary to learn to use a new word processing program. The data are shown.

If there is a significant relationship, predict the time it will take the average secretary who has a typing speed of 72 words per minute to learn the word processing program.

Compute the value of the correlation coefficient.

Select one:

a. .9439.

b. -.9490.

c. -.9742.

d. .5136.

A TALE OF TWO CLASSES

SMITH JONES

Test 1 Test 2 Test 1 Test 2

82 80 80 94

90 88 70 82

78 80 76 74

68 76 86 78

92 86 84 88

88 70 80 90

80 74 80 84

96 84 76 80

70 66 72 76

82 78 80 98

66 72 76 86

94 90 82 94

72 96 60 80

1. Using the above data, perform the given analyses to complete the following tables.

Measures of Central Tendency

SMITH JONES

Mean_____________________________________________________________________________________________

Median____________________________________________________________________________________________

Mode______________________________________________________________________________________________

Wiset Company completes these transactions during April of the current year (the terms of all its credit sales are 2/10, n/30). Apr. 2 Purchased $14,300 of merchandise on credit from Noth Company, invoice dated April 2, terms 2/10, n/60. 3 Sold merchandise on credit to Page Alistair, Invoice No. 760, for $4,000 (cost is $3,000). 3 Purchased $1,480 of office supplies on credit from Custer, Inc. Invoice dated April 2, terms n/10 EOM. 4 Issued Check No. 587 to World View for advertising expense, $899. 5 Sold merchandise on credit to Paula Kohr, Invoice No. 761, for $8,000 (cost is $6,500). 6 Received an $80 credit memorandum from Custer, Inc., for the return of some of the office supplies received on April 3. 9 Purchased $12,125 of store equipment on credit from Hal’s Supply, invoice dated April 9, terms n/10 EOM. 11 Sold merchandise on credit to Nic Nelson, Invoice No. 762, for $10,500 (cost is $7,000). 12 Issued Check No. 588 to Noth Company in payment of its April 2 invoice less the discount. 13 Received payment from Page Alistair for the April 3 sale less the discount. 13 Sold $5,100 of merchandise on credit to Page Alistair (cost is $3,600), Invoice No. 763. 14 Received payment from Paula Kohr for the April 5 sale less the discount. 16 Issued Check No. 589, payable to Payroll, in payment of sales salaries expense for the first half of the month, $10,750. Cashed the check and paid employees. 16 Cash sales for the first half of the month are $52,840 (cost is $35,880). 17 Purchased $13,750 of merchandise on credit from Grant Company, invoice dated April 17, terms 2/10, n/30. 18 Borrowed $60,000 cash from First State Bank by signing a long-term note payable. 20 Received payment from Nic Nelson for the April 11 sale less the discount. 20 Purchased $830 of store supplies on credit from Hal’s Supply, invoice dated April 19, terms n/10 EOM. 23 Received a $750 credit memorandum from Grant Company for the return of defective merchandise received on April 17. 23 Received payment from Page Alistair for the April 13 sale less the discount. 25 Purchased $11,375 of merchandise on credit from Noth Company, invoice dated April 24, terms 2/10, n/60. 26 Issued Check No. 590 to Grant Company in payment of its April 17 invoice less the return and the discount. 27 Sold $3,170 of merchandise on credit to Paula Kohr, Invoice No. 764 (cost is $2,520). 27 Sold $6,700 of merchandise on credit to Nic Nelson, Invoice No. 765 (cost is $4,305). 30 Issued Check No. 591, payable to Payroll, in payment of the sales salaries expense for the last half of the month, $10,750. 30 Cash sales for the last half of the month are $73,975 (cost is $58,900).

What are the solutions for Sales Journal?

Over the past year, the vice president for human resources at a large medical center has run a series of three-month workshops aimed at increasing worker motivation and performance. To check the effectiveness of the workshops, she selected a random sample of 35 employees from the personnel files. She collected the employee performance ratings recorded before and after workshop attendance and stored the paired ratings on sheet Ratings.

Compute descriptive statistics and perform a paired ttest.

State your findings and conclusions in a report to the vice president for human resources.

Thank you!

The following data sets represent simple random samples from a population whose mean is 100. Complete parts ​(a) through ​(e) below. Full data set Data Set I 106 124 88 126 89 71 74 110 Data Set II 106 124 88 126 89 71 74 110 88 91 109 83 113 118 94 124 97 85 80 104 Data Set III 106 124 88 126 89 71 74 110 88 91 109 83 113 118 94 124 97 85 80 104 87 112 117 89 103 81 86 107 93 113 ​(a) Compute the sample mean of each data set. Calculate the sample mean for data set I. x overbarequals nothing ​(Type an integer or a​ decimal.) Calculate the sample mean for data set II. x overbarequals nothing ​(Type an integer or a​ decimal.) Calculate the sample mean for data set III. x overbarequals nothing ​(Round to three decimal places as​ needed.) ​(b) For each data​ set, construct a 95​% confidene

QUESTION 11 Use your TI83 (or Excel): A normally distributed population has a mean of 77 and a standard deviation of 15. Determine the probability that a random data has a value of less than 74. Round to four decimal places.

QUESTION 12 Use your TI83 (or Excel): A normally distributed population has a mean of 77 and a standard deviation of 12. Determine the probability that a random data has a value between 72 and 80. Round to four decimal places.

QUESTION 13 Use your TI83 (or Excel): A normally distributed population has a mean of 74 and a standard deviation of 18. Determine the probability that a random data has a value between 71 and 82. Round to four decimal places.

QUESTION 14 Use your TI83 (or Excel): A normally distributed population has a mean of 72 and a standard deviation of 20. Determine the probability that a random data has a value between 74 and 81. Round to four decimal places.

QUESTION 15 Use your TI83 (or Excel): A normally distributed population has a mean of 79 and a standard deviation of 14. Determine the probability that a random data has a value of less than 77. Round to four decimal places.

Speedy net service is concerned that the level of access for customers is decreasing, as a result of heavier use. The proportion of peak period time when a customer’s download speed drops by 20 percent or more below average time is considered a good measure of service level. The percentage of time a customer experiences such drops during peak periods varies. Using a sampling process, the ISP set up control charts to monitor the service level, based on proportion of below average download speed during peak periods. Construct the p-chart using the sample data in the table worksheet Prob 07-07 in the ch07data.xlsx file on the student companion site for this chapter. What does the chart show? Is the service level based on the pchart data good or bad in your opinion?

CPG Bagels starts the day with a large production run of bagels. Throughout the morning, additional bagels are produced as needed. The last bake is completed at 3 p.m. and the store closes at 8 p.m. It costs approximately $0.20 in materials and labor to make a bagel. The price of a fresh bagel is $0.60. Bagels not sold by the end of the day are sold the next day as “day old” bagels in bags of six, for $0.99 a bag. About two-thirds of the day-old bagels are sold; the remainder are just thrown away. There are many bagel flavors, but for simplicity, concentrate just on the plain bagels. The store manager predicts that demand for plain bagels from 3 p.m. until closing is normally distributed with a mean of 60 and a standard deviation of 27.

b. Suppose that the store manager is concerned that stockouts might cause a loss of future business. To explore this idea, the store manager feels that it is appropriate to assign a stockout cost of $5 per bagel that is demanded but not filled. (Customers frequently purchase more than one bagel at a time. This cost is per bagel demanded that is not satisfied rather than per customer that does not receive a complete order.) Given the additional stockout cost, how many bagels should the store have at 3 p.m. to maximize the store’s expected profit? (Round your answer to the nearest whole number.)

To maximize the store's expected profit ___?

c. Suppose the store manager has 98 bagels at 3 p.m. How many bagels should the store manager expect to have at the end of the day? (Round your answer to the nearest whole number.)

Expected left over inventory ___?

Years ago, many life insurance companies used fear tactics in their marketing campaigns. I can still remember the first time I watched one of those life insurance commercials on TV. At that time, the depiction of the husband as the primary breadwinner matched our households set up. It was eerie watching those commercials that pictured family members going about their business without the man of the house around anymore. The first couple of times that this commercial aired, I was scared about what would happen to our family if my dad was no longer around. However, as the commercial droned on over time, it seemed as if the company was preying on the fear of its customers.

How could a life insurance company market its products to consumers today in such a way that customers would continually be drawn to their product?