Chapter 10, Problem 10.10AC

A recent survey identified the top accounting firms within 10 geographical regions across country X. The top 2 regions reported a combined growth of 19% and 18%. A characteristic description of the accounting firms in these two regions includer the number of partners in the firms. Attached below is a sample of the number of partners for 20 firms for each region. Complete (a) through (c) below. E Click the icon to view the accounting firms data. a. At the 0.05 level of significance when pooling the variances, is there evidence of a difference between the two regions' accounting firms with respect to the mean number of partners? Let u, be the mean number of partners for the highest growth region and Ha be the mean number of partners for the second highest growth region. Determine the hypotheses. Choose the correct answer below. O A. Ho: H1 = H2 H1: H1 # H2 O B. Ho: H1242 H,: H1 H2 O D. Ho: H1 # H2 H1: H1 = 42 - X Accounting firms data Number of partners for 20 firms in the region with…

Four different paints are advertised as having the same drying time. To check the manufacturer's claims, five samples were tested for each of the paints. The time in minutes until the paint was dry enough for a second coat to be applied was recorded. The following data were obtained. Excel users: The data set is available in file named Paint. All data sets can be found on the premium online datasite. Click on the datafile logo to reference the data. (the excel data is below) Paint 1 Paint 2 Paint 3 Paint 4   128 144 133 150   137 133 143 142   135 142 137 135   124 146 136 140   141 130 131 153                                           At the A=0.05 level of significance, test to see whether the mean drying time is the same for each type of paint. Compute the values identified below (to 2 decimals, if necessary).   Sum of Squares, Treatment   Sum of Squares,…

Accounting Today identified top accounting firms in 10 geographic regions across the United States. All 10 regions reported growth in a recent year. The Southeast and Gulf Coast regions reported growths of 12.49% and 9.78%, respectively. A characteristic description of the accounting firms in the Southeast and Gulf Coast regions included the number of partners in the firm. The file [Accounting Partners 2] contains the number of partners. Source: Data extracted from Accounting Today, "The 2019 Top Firms and Regional Leaders," available at bit.ly/2XdQVVW. Number of Partners Region Southeast Southeast Southeast Southeast Southeast Southeast Southeast Southeast Southeast Southeast Southeast Southeast Southeast Southeast Southeast Southeast Southeast Southeast Southeast Southeast Southeast Southeast Gulf Coast Gulf Coast Gulf Coast Gulf Coast Gulf Coast Gulf Coast Gulf Coast Gulf Coast Gulf Coast Gulf Coast Gulf Coast Gulf Coast Gulf Coast Gulf Coast Gulf Coast Gulf Coast Gulf Coast Gulf…

Johnson Filtration, Inc. provides maintenance service for water-filtration systems. Suppose that in addition to information on the number of months since the machine was serviced and whether a mechanical or an electrical repair was necessary, the managers obtained a list showing which repairperson performed the service. The revised data follow. Click on the datafile logo to reference the data. DATA file Repair Time Months Since in Hours Last Service Type of Repair Repairperson 2.9 Electrical Dave Newton 3.0 Mechanical Dave Newton 4.8 8. Electrical Bob Jones 1.8 Mechanical Dave Newton 2.9 Electrical Dave Newton 4.9 Electrical Bob Jones 4.2 6. Mechanical Bob Jones 4.8 8. Mechanical Bob Jones 4.4 4. Electrical Bob Jones 4.5 Electrical Dave Newton a. Ignore for now the months since the last maintenance service (1 ) and the repairperson who performed the service. Develop the estimated simpe linear regression equation to predict the repair time (y) given the type of repair (2 ). Recall that…

The sales manager of a large automotive parts distributor wants to estimate the total annual sales for each of the company’s regions. Five factors appear to be related to regional sales: the number of retail outlets in the region, the number of automobiles in the region registered as of April 1, the total personal income recorded in the first quarter of the year, the average age of the automobiles (years), and the number of sales supervisors in the region. The data for each region were gathered for last year. For example, see the following table. In region 1 there were 1,739 retail outlets stocking the company’s automotive parts, there were 9,270,000 registered automobiles in the region as of April 1, and so on. The region’s sales for that year were $37,702,000. constant outlet automobile reg income age bosses 37.702 1,739 9.27 85.4 3.5 9 24.196 1,221 5.86 60.7 5 5 32.055 1,846 8.81 68.1 4.4 7 3.611 120 3.81 20.2 4 5 17.625 1,096 10.31 33.8 3.5 7 45.919 2,290 11.62 95.1…

When exposed to an infection, a person typically develops antibodies. The extent to which theantibodies respond can be measured by looking at a persons titer, which is a measure of the number of antibodies present. The higher the titer is, the more antibodies that are present. The data in Table represent the titers of 11 ill people and 11 healthy people exposed to the tularemia virus in Vermont. Is the level of titer in the ill group greater than the level of titer in the healthy group? Use the α = 0.10 level of significance.

Most vertebrate adult body sizes remain constant or increase throughout their lives.  Marine iguanas are different in that they can actually decrease in size, in periods of low food availability.  Examine the data set here, and test the hypothesis that on average across time, iguana length changed (increased) by 1 mm.  Paste your R code in the answer box, and tell me your conclusion.  Data is here: https://github.com/lisamanne/biostats_data/raw/main/Iguana_lengths.csv DATA- Tributary,Species_upstream,Species_downstream I��,14,19 Juta�,11,18 Japur�,8,8 Coari,5,7 Purus,10,16 Manacapuru,5,6 Negro,23,24 Madeira,29,30 Trombetas,19,16 Tapaj�s,16,20 Xingu,25,21 Tocantins,10,12

A certain county had a population of 34,485 people. The county hospital is interested in estimating the number of people in the county with blood type-O. To do this, they test blood samples from 228 patients. Out of this group, 10 have blood type-O. Use this sample to estimate the number of people in the county with blood type-O.

uppose Laura, a facilities manager at a health and wellness company, wants to estimate the difference in the average amount of time that men and women spend at the company's fitness centers each week. Laura randomly selects 13 adult male fitness center members from the membership database and then selects 13 adult female members from the database. Laura gathers data from the past month containing logged time at the fitness center for these members. She plans to use the data to estimate the difference in the time men and women spend per week at the fitness center. The sample statistics are summarized in the table. Population Populationdescription Population mean(unknown) Samplesize Sample mean(min) Sample standarddeviation (min) 1 male ?1 ?1=13 ?⎯⎯⎯1=132.5 ?1=45.3 2 female ?2 ?2=13 ?⎯⎯⎯2=108.7 ?2=31.1   df=21.256 The population standard deviations are unknown and unlikely to be equal, based on the sample data. Laura plans to use the two-sample ?-procedures to estimate the…