The time between the arrival of electronic messages at your computer is exponentially distributed with a mean of two hours. What is the probability that you do not receive a message during a four-hour period? a. NONE b. 0.8647 O c. 0.3679 d. 0.1353
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- Assume that the time it takes for bacterial growth on a dairy product after it is taken out of fridge follows an Exponential distribution with a mean of 10 minutes. What is the probability that bacterial growth will not happen in 15 minutes if the dairy product has already been out of the fridge for 10 minutes? O A. 0.393 O B. 0.777 O C. 0.607 O D. 0.223 Reset SelectionAssume that 11% of College students are left-handed. Suppose you randomly select 100 students and let the number of left-handed students in the sample. (As above, we assume each “trial” is independent.) The probability histogram for is shown below. Calculate the standard deviation of . State your answer as a decimal rounded to four decimal places.The mean percent of childhood asthma prevalence in 43 cities is 2.38%. A random sample of 33 of these cities is selected. What is the probability that the mean childhood asthma prevalence for the sample is greater than 2.7%? Interpret this probability. Assume that σ=1.31%.
- Calculate the relative frequency P(E). You have read 150 of the 500 novels in your home, but your sister Roslyn has read 200, of which only 50 are novels you have read as well. E is the event that a novel has been read by neither you nor your sister. P(E) =Find the indicated probability and interpret the result. From 1975 through 2020, the mean annual gain of the Dow Jones Industrial Average was 651. A random sample of 33 years is selected from this population. What is the probability that the mean gain for the sample was between 500 and 700? Assume o = 1541. The probability is (Round to four decimal places as needed.)Find the indicated probability and interpret the result. From 1975 through 2020, the mean annual gain of the Dow Jones Industrial Average was 651. A random sample of 31 years is selected from this population. What is the probability that the mean gain for the sample was between 500 and 800? Assume σ=1540.
- Assume that the amount of time until a kid gets bored and wants to leave a playground can be modeled using exponential distribution. Given that 5 kids leave a particular playground on average per hour, if a kid has already played 10 minutes there what is the probability he will have spent at least a total of 25 minutes before he leaves? OA. 0.2865 OB. 0,7135 OC 0.8755 OD.0.1245A B C Total Male 7 8 3 18 Female 20 4 14 38 Total 27 12 17 56 If one student is chosen at random,find the probability that the student was female OR received a grade of "B". (Leave the answer to four decimal places.)D. 286/973; 0.294
- The mean percent of childhood asthma prevalence in 43 cities is 2.21%. A random sample of 30 of these cities is selected. What is the probability that the mean childhood asthma prevalence for the sample is greater than 2.5%? Interpret this probability. Assume that σ=1.22%.Find the indicated probability and interpret the result. From 1975 through 2020, the mean annual gain of the Dow Jones Industrial Average was 652. A random sample of 35 years is selected from this population. What is the probability that the mean gain for the sample was between 500 and 800? Assume o = 1541. The probability is (Round to four decimal places as needed.) Csolve 1.3.6 please and explain the work