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STATISTICS AND PROBABILITY
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Probability Answers
Probability
asked 2021-03-12
A statistical investigation showed that adults in a particular country have an 80% chance of living to be at least 70 years old and a 50% chance of living to be at least 80 years old. What is the probability that an adult who just turned 70 will live to be 80?
Probability
asked 2021-03-11
Three students are arguing, Chad says, "I think the probability is 1 out of 2." Tien says, "No, it is 40 over 80." Falicia says, "It is 50%." What do you say to the students?
Probability
asked 2021-03-07
A hip joint replacement part is being stress-tested in a laboratory. The probability of successfully completing the test is 0.883. 11 randomly and independently chosen parts are tested. What is the probability that exactly two of the 11 parts successfully complete the test?
Probability
asked 2021-03-05
You ask a neighbor to water a sickly plant while you are on vacation. Without water the plant will die with probability 0.85. With water it will die with probability 0.5. You are 90 % certain the neighbor will remember to water the plant. You come back from the vacation and the plant is dead. What is the probability that the plant died because neighbor forgot to water it?
Probability
asked 2021-03-05
[Graph]
P(red or yellow) 30%
P(not green)
Probability
asked 2021-03-02
Fruit Flles An experiment with fruit flies involves one parent with notmal wings and ooe parent with vestigial wings. When these parents have an of
\(\displaystyle\frac{{3}}{{4}}\) probabulty that the of
\(\displaystyle\frac{{1}}{{4}}/{4}\) probability of vestigial wings. If the parents give birth to five of
Probability
asked 2021-03-02
What is the probability of drawing 2 cards in succession (without replacement) from a standard deck of playing cards and having them both be hearts?
Probability
asked 2021-02-26
Census reports for a city indicate that 62% of residents classify themselves as Christian, 12% as Jewish , and 16% as members of other religions (Muslims, Buddhists, etc.).
The remaining residents classify themselves as nonreligious.
A polling organization seeking information about public opinions wants to be sure to talk with people holding a variety of religious views, and makes random phone calls. Among the first four people they call, what is the probability they reach a) all Christians? b) no Jews? c) at least one person who is nonreligious?
Probability
asked 2021-02-21
Subjects for the next presidential election poll are contacted using telephone numbers in which the last four digits are randomly selected (with replacement). Find the probability that for one such phone number, the last four digits include at least one 0.
Probability
asked 2021-02-19
The diagram shows a spinner. When the arrow is spun the probability of scoring a 2 is 0.3 . The arrow is spun twice and the scores are added. What is the probability that the total score is 6?6? Express the answer as a decimal. [ \sqrt { 2 } \text { . } ]
Probability
asked 2021-02-11
Suppose p and q are nonzero integers with different signs. Is the product p(-q) positive or negative? Explain.
Probability
asked 2021-02-04
A bin contains seven red chips, nine green chips, three yellow chips, and six blue chips. Find each probability. drawing a yellow chip, replacing it, and choosing a blue chip.
Probability
asked 2021-02-03
A normal distribution has a mean of 32 and a standard deviation of 4. Find the probability that a randomly selected xx -value from the distribution is at most 35. Round to four decimal places.
Probability
asked 2021-02-02
Triangle XYZ undergoes a single transformation to form the image, triangle X′Y′Z′ . The image is congruent to the original figure. Which of the following best describes the possible transformation that took place?
O A. a reflection only
O B. a rotation only
O C. a translation only
O D. a reflection, rotation, or a translation
Probability
asked 2021-02-02
Determine whether the number described is a statistic or a parameter.
Of the students enrolled in a certain college, 80%, are full-time.
Probability
asked 2021-01-31
Sample 1 has 17 "yes" responses out of 97 in the sample, sample 2 has "yes" 46 responses out of 131 responses in the sample. Calculate the point estimate for the difference between the population proportions of "yes" responses.
Probability
asked 2021-01-31
You check 15bananas. Six of the bananas are bruised.
What is the experimental probability that a banara is bruised?
What is the experimental probability that a banana is nor bruised?
Probability
asked 2021-01-28
Data is being processed from 35 data sources. Each dataset may or may or net generate dataset at the beginning of each timeslot, the probability that any individual source actually generates a dataset is 0.004,and the data sources are independent. In each time slot we can process up to two datasets. Now, the processing is real time with the processed results only being considered if they are done within the time slot. Determine the probability that all incoming datasets can be processed in any particular time slot?
Probability
asked 2021-01-28
Three cards are selected from a deck of cards without replacement. What is the probability that you will get a king, a jack, and a queen?
Probability
asked 2021-01-27
Charlie and Clare are playing a number-guessing game. Charlie picked two numbers between 1 and 5. To win the game, Clare must guess both his numbers in three lines. Her guesses, simulated using a random-number generator are shown in the table. If Charlie's numbers are 1 and 3, what is the experimental probability that Clare won?
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3
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