A nation-wide mail order house desires to verify the accuracy of its clerical work in completing invoices. Sub-groups of 200 are taken each day for 30 consecutive for inspection. A defective is defined as an invoice containing at least one of a number of possible errors. The number of defectives found in each of these 30 groups are as follows: 75634 10 3 258 612354897 10 35433764 35 Construct control chart of the data given above and comment on the state of control.
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- Two different types of polishing solutions are being evaluated for possible use in a tumble-polish operation for manufacturing interocular lenses used in the human eye following cataract surgery. Three hundred lenses were tumble polished using the first polishing solution, and ofthis number, 253 had no polishing-induced defects. Another 300 lenses were tumble-polishedusing the second polishing solution, and 196 lenses were satisfactory upon completion.(a) Is there any reason to believe that the two polishing solutions differ? Use α = 0.01. A research center claims that at least 23% of adults in a certain country think that their taxes will be audited. In a random sample of 900 adults in that country in a recent year, 19% say they are concerned that their taxes will be audited. At α=0.01, is there enough evidence to reject the center's claim? Complete parts (a) through (e) below. (a) Identify the claim and state H0 and Ha.If a manufacturer is trying to put together a sample collection of her safetyproduct and order is not important, how many combinations can becreated with 15 items that will be placed in packages containing fiveitems? If order is important, how many permutations can be created?
- An insurance company offers its policyholders a number of different premium payment options. For a randomly selected policyholder, let X = the number of months between successive payments. The cdf of X is as follows: REFER IMAGE a. What is the pmf of X?b. Using just the cdf, compute P(3 ≤ x ≤ 6) and P(4 ≤ X)3.273525429 3.725058267 3.193881287 3.380595777 3.849062312 2.688788698 4.521501366 2.876926464 3.202865171 3.760862809 3.648737967 3.155042169 3.047772295 2.331491399 2.43426651 3.316262576 3.33570391 3.123784316 1.983014564 4.026381813 2.819851735 3.020835161 3.963952045 3.434812572 2.530150764 3.501124236 2.723868073 3.734018756 3.07485433 2.945439985 2.963046282 3.301251136 3.806637216 2.495620331 2.99022362 2.548798319 2.849586988 3.554039618 3.565046584 3.383944772 2.895875003 3.96006813 3.744978387 4.034873151 3.394484477 4.637022161 3.085000083 3.945715143 2.590540526 3.593019815 Data from sheet 5In a certain village 20% of the population is literate, and assume that 150 investigators take a sample of ten individuals each to see whether they are literate. How many investigators would you expect to report that three people or less are literates in the sample?
- The television show Degenerate Housewives has been successful for many years. That show recently had ashare of 24, meaning that among the TV sets in use, 24% were tuned to Degenerate Housewives. Assumethat an advertiser wants to verify that 24% share value by conducting its own survey, and a pilot surveybegins with 14 households have TV sets in use at the time of a Degenerate Housewives broadcast.(a) Find P(none)(b) Find P(at least one)(c) Find P(at most one)The management of the local zoo wants to know if all of their animal exhibits are equally popular. If there is significant evidence that some of the exhibits are not being visited frequently enough, then changes may need to take place within the zoo. A tally of visitors is taken for each of the following animals throughout the course of a week, and the results are contained in the following table. At α=0.025, determine whether there is sufficient evidence to conclude that some exhibits are less popular than others. Animal Exhibits at the Zoo Elephants Lions/Tigers Giraffes Zebras Monkeys Birds Reptiles Number of visitors 164 166 172 188 165 139 142 Copy Data Step 3 of 4 : Compute the value of the test statistic. Round any intermediate calculations to at least six decimal places, and round your final answer to three decimal places.3.273525 3.725058 3.193881 3.380596 3.849062 2.688789 4.521501 2.876926 3.202865 3.760863 3.648738 3.155042 3.047772 2.331491 2.434267 3.316263 3.335704 3.123784 1.983015 4.026382 2.819852 3.020835 3.963952 3.434813 2.530151 3.501124 2.723868 3.734019 3.074854 2.94544 2.963046 3.301251 3.806637 2.49562 2.990224 2.548798 2.849587 3.55404 3.565047 3.383945 2.895875 3.960068 3.744978 4.034873 3.394484 4.637022 3.085 3.945715 2.590541 3.59302 Spreadsheet 5
- The management of the local zoo wants to know if all of their animal exhibits are equally popular. If there is significant evidence that some of the exhibits are not being visited frequently enough, then changes may need to take place within the zoo. A tally of visitors is taken for each of the following animals throughout the course of a week, and the results are contained in the following table. At α=0.05, determine whether there is sufficient evidence to conclude that some exhibits are less popular than others. Animal Exhibits at the ZooElephants Lions/Tigers Giraffes Zebras Monkeys Birds ReptilesNumber of visitors 137 129 161 147 160 134 131 Step 3 of 4 : Compute the value of the test statistic. Round any intermediate calculations to at least six decimal places, and round your final answer to three decimal places. Step 4 of 4: Draw a conclusion and interpret the decision. (Reject or fail to reject, Is there enough evidence or not?)The management of the local zoo wants to know if all of their animal exhibits are equally popular. If there is significant evidence that some of the exhibits are not being visited frequently enough, then changes may need to take place within the zoo. A tally of visitors is taken for each of the following animals throughout the course of a week, and the results are contained in the following table. At α=0.005, determine whether there is sufficient evidence to conclude that some exhibits are less popular than others. Animal Exhibits at the Zoo Elephants Lions/Tigers Giraffes Zebras Monkeys Birds ReptilesNumber of visitors 152 175 185 144 145 171 163 Step 2 of 4 : Calculate the expected value for the number of visitors for the birds exhibit. Enter your answer as a fraction or a decimal rounded to three decimal places. Step 3 of 4: Compute the value of the test statistic. Round any calculations to at least six decimals places and round your final answer to three…A disgruntled employee of a prominent delivery company in Baltimore County is accused of adding water into the fuel tanks of a large fleet of delivery vehicles. The manager asked the guard who observed the act to walk the parking lot with him to identify a sample of vehicles closer to the guards' booth. Upon returning to his office, the manager figured that since all the vehicles were of the same color, same engine size, and were on an inventory purchased and delivered just about the same year when all the previously existing vehicles were sold away, the decision to include the entire fleet for testing prior to filing the police report. The vehicles inventory could be described as . . .