In a factory that manufactures computers, 8 computers out of 10 function correctly. What is the probability that a computer selected at random wil be defective? A 4/5 BO 1/4 CO 1/5
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- For this problem, assume that outcome O1O1 has frequency 1/a1/a, outcome O2O2 has frequency 11/a11/a, and outcome O3O3 has frequency 12/a12/a. What is the value of aa?An education researcher claims that 57%of college students work year-round. In a random sample of 300 college students, 171 say they work year-round. At α=0.01, is there enough evidence to reject the researcher's claim? (a) Identify the claim and state H0 and Ha. Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) A. % of college students work year-round. B. At least %of college students work year-round. C. The percentage of college students who work year-round is not %. D. At most %of college students work year-round. (b) State H0 and Ha.Select the correct choice below and fill in the answer boxes to complete your choice. A. H0:p≠Fill Ha:p=Fill B. H0:p≥Fill Ha:p<Fill C. H0:p≤Fill Ha:p>Fill D. H0:p<Fill Ha:p≥fill E. H0:p>fill Ha:p≤fill…For this problem, assume that outcome O1has frequency 1/a, outcome O2 has frequency 10/a and outcome O3 has frequency 8/a What is the value of a
- SpgA sample of 500 students during the fall semester shows that 300 took ECON 201, 220 took MATH 126, and 80 students took both at the same time. What is the probability that a student took ECON 201 or MATH 126.Suppose that a group of illegal counterfeiters print 1,000 copies of fake $20 bills and introduces them into the economy. Suppose that each bill is used once per week (starting in week 1), and that each time a bill is used, it has a 1 in 5 chance of being detected as fake. If it is detected, it is removed. If not, it is used again. k n-1 (a) What does the expression E 1000 (" ) represent? Explain. n=1 Suggestion: If you are unsure, try writing out the expression for n = 1,2, 3 and consider what these might represent.
- 3. 7 8. 10 An ordinary (fair) coin is tossed 3 times. Outcomes are thus triples of "heads" (h) and "tails" (t) which we write hth, ttt, etc. For each outcome, let R be the random variable counting the number of tails in each outcome. For example, if the outcome is tht, then R (tht)=2. Suppose that the random variable X is defined in terms of R as follows: X=R-1. The values of X are given in the table below. tth hht hth thh ttt hhh htt tht Outcome Value of X 1 - 1 1 1 Calculate the values of the probability distribution function of X, i.e. the function py. First, fill in the first row with the values of X. Then fill in the appropriate probabilities in the second row. Value X of X Px (x) Submit A Continue © 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center étv MacBook Air DII DD F10 80 F9 F7 F8 F6 F4 F5 F2 F3 公 云。 oloEach of the numbers 0 - 9 is written on a sheet of paper and the ten sheets of paper are placed in a box If two of these sheets of paper are selected from the box at random, without replacement, find the probability that both numbers are greater than 7.All the letters in the word NIDAVELLIR are randomly arranged in a line. How many of the arrangements are with two L’s together at the beginning of the arrangement?
- Jack has just been given a ten-question multiple choice quiz in history class. Each question has five answers, of which only one is correct. Since Jack has not attended class recently, he does not know any of the answers. Assuming Jack guesses randomly on all ten questions, find the probability that he will answer six or more of the questions correctly and avoid an F.On each trial of an experiment, a subject is presented with a constant soft noise, which is interrupted at some unpredictable time by a noticeably louder sound. The time it takes for the subject to react to this louder sound is recorded. The following list contains the reaction times (in milliseconds) for the 15 trials of this experiment: 212, 236, 217, 235, 164, 257, 175, 285, 202, 193, 231,152, 269, 296, 186 Send data to calculator Find 30th and 75th percentiles for these reaction times.Q.6