The probability of failure in a physics practical examination is 20%. If 25 batches of 6 students each take the examination, in how many batches of 4 or more students would pass?
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Q: 59% of all the town's residents own a dog and 67% own a cat. Of the dog owners 48% also own a cat.…
A: 59% of all the town's residents own a dog 67% own a cat. Of the dog owners 48% also own a cat.
Q: 59% of all the town's residents own a dog and 61% own a cat. Of the dog owners 42% also own a cat.…
A: 59% of all the town's residents own a dog 61% own a cat. Of the dog owners 42% also own a cat.
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- 20 out of 800 products were found to be defective. At the same rate, how many defective parts will be found in 40,000 products?A private opinion poll is conducted for a politician to determine what proportion of the population favors adding more national parks. How large a sample is needed in order to be 95% confident that the sample proportion will not differ from the true proportion by more than 4%?If I got 8 out of 12 answers the same as a classmate, is it possible for me to get no answers correct and him to get 75% correct?
- A total of 205 people were asked to pick their favorite product from a list of three options. Consumers chose product A 83 times, B 75 times, and C 47 times. Is there enough evidence to say that the three products have different chances of being chosen? ? = 0.10A 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.57% of all the town's residents own a dog and 66% own a cat. Of the dog owners 49% also own a cat. If a town resident is chosen at random find: (round to 4 decimal places where possible) a. P(Own a Dog) = b. P(Own a Cat) = c. P(Own a Cat and a Dog) = d. P(Own a Dog GIVEN Own a Cat) =
- Supposed that in the past, 10% of women in the Philippines have severe dysmenorrhea. Do we have enough reason to believe that the proportion of women having terrible cramps has decreased if, in a random barangay population of 1,256 women, 122 have severe enough cramping to interfere with their daily lives? Use a = 0.05A student pursuing a degree in English as a second language believes the proportion female factory workers who can't speak English is less than the proportion of male factory workers who can't speak English. To test her claim she randomly selects 313 female factory workers and out of them 48 could not speak English. She then randomly selects 400 male factory workers and out of them 43 could not speak English. Test her claim at a=0.05 to see if she was right. The correct hypotheses are: O Ho:PF Рм (сclaim) O Ho:PF 2 PM HA:PF < PM(claim) O Ho:PF = pM HA:PF + PM(claim) Since the level of significance is 0.10 the critical value is -1.282 The test statistic is: (round to 3 places) The p-value is: (round to 3 places) The decision can be made to: O reject Ho O do not reject Ho The final conclusion is that: O There is enough evidence to reject the claim that the proportion female factory workers who can't speak English is less than the proportion of male factory workers who can't speak…A survey found that in a sample of 100 families, 37 owned cats. A survey done 5 years ago found that in a sample of 80 families, 34 owned cats. At ? = 0.05 has the proportion of cat owners changed over the 5-year period?
- Rose randomly surveyed 50 students and found that 15 had a part-time job. If there are 750 students in Rose's school, predict the total number of students with a part-time jobAn interdepartmental task force is being formed to investigate an increase in violent crimes. 1/5 of the task force will be police officers from the local precinct. 1/4 will be ATF agents, and the remaining 22 will be from the FBI. How many people are participating in the task force?Find the probability of obtaining a sum that is divided by 2 without remaining .from a single toss of a pair of dice