9. Family of cardioids
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- Selection bias occurs when O the population has been divided into strata cluster sampling is used instead of stratified random sampling O portions of the population are excluded from the consideration for the sample those responding to a survey or poll differ systematically from the nonrespondentsNo written by hand solution There are 255 clinics in a large city and a sample of 25 clinics is chosen by SRSWOR. The number of patients who came to this these clinics for treatment in a week are given below. 450, 410, 275, 310, 467, 123, 79, 103, 401, 245, 278, 67, 190, 237, 59, 112, 302, 409, 417, 289, 346, 400, 316, 88, 90 Using normal approximation, a 95% confidence interval for the proportion of clinics in the city with fewer than 100 patients per week, will be approximately given by, (fpc cannot be ignored, continuity correction is to be ignored )7
- 1 By how many times does the sample size have to be increased to decrease the margin of error by a factor of -? 1 The sample size must be increased by a factor of to decrease the margin of error by a factor of 7 (Type a whole number.)An experiment consists of recording the patient's gender; Male (M) or Female (F), then his/her Blood Pressure Level; Normal (N), Elevated (E) or High (H). The sample space of the experiment will be: O S-(NM, EM, HM, NF, EF, HF} O S=(MN, ME, MH, FN, FE, FH) O =-{MF, NEH} O S=(M, F, N, E, H}Domanda 3 The testing plan on a batch with a high number of pieces is based on two control phases: Risposta non data First phase, N pieces controlled: Punteggio max if the number of pieces out of tolerance is lower or equal than n. then the batch is accepted 8,00 if the number of pieces out of tolerance is greater than n., but lower or equal than n then the second phase is performed P Contrassegna Second phase, N. pieces controlled: domanda if the number of pieces out of tolerance in the second phase is lower or equal than n, then the batch is accepted Evaluate the probability that a batch having a percentage Pof pieces out of tolerance is accepted First phase N, 150 n11 3 8 Second N2 400 phase n21 Percentage P of pieces out of 4% tolerance Express numerical results with 2 decimal digits (e.g. 0.12 or 67.89). Probability that the batch is accepted in the first phase: Total probability that the batch is accepted in the second phase: Total probability that the batch is accepted: X (%]
- Verdadero= true falso=falseElectricity_Sales Number_of_Customers Price Degree_Days1,144,781 690,044.7 6.7651 547.43381,143,784 693,866.5 6.8928 -26.32671,184,600 697,890.9 6.8626 -1.68351,139,054 701,234.3 6.2738 12.41161,204,495 704,746.5 6.1591 606.30471,179,366 709,583.7 6.2017 148.18261,085,489 713,389.1 6.5480 -2.00321,160,943 717,401.4 5.9404 -83.56021,158,592 721,355.7 5.8960 66.95031,193,556 724,228.1 6.0853 24.28791,202,514 727,191.2 6.2554 -0.94671,174,335 729,230.4 6.3808 -56.38711,174,335 731,584.4 6.2768 -360.98421,161,770 734,456.2 6.5243 -192.40871,142,863 737,848.2 6.4216 -2.85731,196,627 739,084.7 6.2837 -168.64071,236,468 740,332.7 6.1659 551.90681,188,673 741,904.4 6.0801 55.77211,181,075 743,467.6 6.9015 -2.50411,203,114 743,895.9 6.4296 -159.82191,168,515 745,209.2 6.9283 -610.34381,224,423…What is the positive predictive value of OraQuick, ?(HIV | positive test), in this high‑risk population? (Enter your answer rounded to four decimal places.)
- days/price <150k 150-199.9 k 200-250k >250k total <30 37 15 18 7 77 30-90 30 112 210 22 374 >90 6 60 75 8 149 total 73 187 303 37 600 the table above shows the inital asking price and days listed until sold for a random sample of cooper realty homes in the albany new york area. find the p (not 150k < p <250k ) or > 90 days361/variants/615047/take/5/ Four players from the NBA and their career 3-point percentage are listed below. 3-point percentage is calculated by dividing the number of 3-pointers the player makes by the number of 3-pointers he attempts. If Steph Curry attempted 25 3-pointers in his last game, how many can we assume he made? Player Stephen Curry 3PT% 43.5% LeBron James 34.5% James Harden 36.4% Giannis Antetokounmpo 28.5% A 5 B 10 20 D 15