Thirty-two percent of the students in a management class are graduate students. A random sample of...
H al Random Variable n=30 2. It has been reported that 39% of college students graduate in 4 years. Consider a random sample of thirty students, and let the random variable X be the number who graduate in 4 years. a. Find the probability that exactly 13 students in the sample of 30 graduate in 4 years. b. Find the probability that 15 or fewer students in the sample graduate in 4 years. That is, find PIX S15). c. Using...
According to national data, about 13% of American college students earn a graduate degree. Using this estimate, what is the probability that exactly 28 undergraduates in a random sample of 200 students will earn a college degree? Hint: Use the normal approximation to the binomial distribution, where p = 0.13 and q = 0.87. (Round your answer to four decimal places
5. Thirty percent of all automobiles undergoing an emissions inspection at a certain inspection station fail the inspection. In a random sample of 15 selected cars: (round 3 decimal places) a) Find the probability that at most five of the cars fail the inspection. b) Find the probability that at least three of the cars fail the inspection. c) Find the probability that all 15 of the cars fail the inspection. 6. Twenty-five percent of the customers of a grocery...
In a large university, 15% of the students are female. If a random sample of twenty students is selected, a. what is the probability that the sample contains exactly four female students? b. what is the probability that the sample will contain no female students? c. what is the probability that the sample will contain exactly twenty female students? d. what is the probability that the sample will contain more than nine female students? e. what is the probability that...
6. (10pt) Fifty percent of all the students in Palisades High said they eat only pizza for lunch. A random sample of three students from Palisades High is selected. What is the probability , to four decimal places, that exactly 2 eat only pizza for lunch.
Twenty-five percent of the employees of a large company are minorities. A random sample of 9 employees is selected. Round answers to the nearest thousandths (3 decimal places). What is the probability that the sample contains exactly 4 minorities? a. (1 point) What is the probability that the sample contains fewer than 2 minorities? b. (1 point) What is the probability that the sample contains exactly 3 non-minorities? C. (1 point) What is the expected number of minorities in the...
Consider the following two scenarios. A) take a simple random sample of 100 graduate students at X university and b) take a simple random sample of 100 graduate students studying Data Science. For each sample you record the amount spent on textbooks used for classes. Which sample do you expect to have the smaller standard deviation? Explain your answer.
A statistics class has 26 students. The instructor would like to select a random sample of 3 students to work together on a group project. a. How many different samples are possible? b. If 13 of the 26 students in class are freshmen, what is the probability that all 3 of the selected students are freshmen? Help please
Question 11-In a large statistics class. PM 100% of all students are male and the rest are female. The heights of all male students follow a normal distribution with mean Ax and standard deviation σΜ. The heights of all female students follow a normal distribution with mean Mr and standard deviation σ Suppose a random sample of n students is selected independently. Let H be the mean height of these n randomly selected students. a. Determine E[H) and Va[FI /...
Hey!! CAN SOMEONE PLEASE ANSWER FOR ME QUICK THANKYOU! One college class had a total of 80 students. The average score for the class on the last exam was 82.6 with a standard deviation of 5.3. A random sample of 35 students was selected. a. Calculate the standard error of the mean. b. What is the probability that the sample mean will be less than 84? c. What is the probability that the sample mean will be more than 83?...