Here we are given x follow binomial(20, 0 . 25)
So p(x=4) =10c4*(0.25) x(0.75) ^(10-x) =0.1460 will be the answer
The probability that a student passes the first Biostats test without studying is 0.25. If 10...
A student studying for a vocabulary test knows the meanings of 10 words from a list of 24 words. If the test contains 10 words from the study list, what is the probability that at least 8 of the words on the test are words that the student knows? (Round your answer to three decimal places.)
Tim and Murphy take a test. The probability that Tim passes the test is 0.5 and probability Murphy passes is 0.5. Assume they take the test independent of each other. Then the probability that at least one of them pass the test is 0.75. true or false? if it is false please explain
A student studying for a vocabulary test knows the meanings of 14 words from a list of 22 words. If the test contains 10 words from the study list, what is the probability that at least 8 of the words on the test are words that the student knows? (Round your answer to three decimal places.)
A student studying for a vocabulary test knows the meanings of 16 words from a list of 20 words. If the test contains 10 words from the study list, what is the probability that at least 8 of the words on the test are words that the student knows? (Round your answer to three decimal places.)
A student studying for a vocabulary test knows the meanings of 14 words from a list of 26 words. If the test contains 10 words from the study list, what is the probability that at least 8 of the words on the test are words that the student knows? (Round your answer to three decimal places.) 958
042. A group of 20 students spend between 0 and 6 hours studying for an exam. How does the number of hours spend studying for the exam affect the probability that the student will pass the exam logistic regression model where the categorical variable pass (1pass, 0- fail) is dependent on the number of hours spent studying for the exam. What is the probability of passing the exam if the student studied for 3 and 5 hours' duration? a. 0.07...
12. In a Biology class 85% of students pass the midterm exam. If a student passes the midterm exam, there is a 75% they pass the final. If a student does not pass the midterm exam, there is a 55% chance of passing the final exam. a. [3] What is the probability that a student passes both exams? b. [3] If a student passes the final, what is the probability that they passed the midterm exam? C. [3] Are the...
A test consists of 10 true or false questions. To pass the test a student must answer at least eight questions correctly. If the student guesses on each question what is the probability that the student will pass the test
11. A Biology instructor is wondering about the average amount of time a student spent studying for a test. She asks a random sample of 18 of her students for their amount of study time and determines that the mean study time in the sample is 6.3 hours with a standard deviation in the sample of 1.94 hours. She believes that it is reasonable to assume that the overall distribution of study times is normal. Give this instructor a 98%...
A test consists of 10 true/false questions. To pass the test a student must answer at least 6 questions correctly. If a student guesses on each question, what is the probability that: a. the student will pass the test b. the student will fail the test c. the student will get a 100 (all questions will be answered correctly)