If it is known that the percentage of successful students is 75%, and you take a sample of 15 students, calculate 1. The probability of having 10 successful bears 2. The probability of success of more than 13 students 3. variance

Q: Which of the following is not true? 1. The probability of making a type II error and the level of…

A: Definitions Type I error α It is rejecting the null hypothesis H0 when it is true.   Type II error β…

Q: About 77​% of all female heart transplant patients will survive for at least 3 years. Eighty female…

A: The probability that the sample proportion surviving for at least 3 years will be less than 72​% is,

Q: real estate agent’s rate of success to make a sale among his customers is 20%. In a normal workweek,…

A: From the given information we find the solution.

Q: Let X and Y be independent random variables. Given that the variance of X is 2, and the variance of…

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Q: A population has SS - 100 and variance, o-4. What is the value of EX - jal for the population? O 100…

A: given that ss of population=100 variance σ2 =4 σ2= [Σ(x-μ)2]/N where N is number of data

Q: A 10-year study conducted by the American Heart Association provided data on how age, blood…

A: Given Information:

Q: I. Formulate 2 examples of each kind of random variable: DISCRETE and CONTINUOUS. Construct a…

A: Discrete random variable: A random variable which takes only countable number of values, are called…

Q: If four coins are tossed simultaneously, what is the probability distribution of the random variable…

A: From the provided information, Total outcomes tossing four coins simultaneously = 42 = 16

Q: need answer for expected value

A: It is an important part of statistics. It is widely used.

Q: Find the variance with solution

A:

Q: Suppose that you draw a random sample from a population where you know the population mean is 36 and…

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Q: a. [3] What is the probability that V runs a race in less than 14 seconds? b. [3] What is the…

A: Given:  V , W and P are three independent and normally distributed.  E( V) = 15 E( W)= 16.2 E( P)=…

Q: in a distribution of 600 values the mean is 90 and the variance is 225. answer each using…

A: Chebyshev's inequality : Chebyshev's inequality then implies that the likelihood of an observation…

Q: Jessica hypothesizes that giraffes will look longer at human infants than at adults. In her zoo, she…

A: It is given that Jessica hypothesizes that giraffes will look longer at human infants than at adults…

Q: In a 25-Question multiple-choice, there are five possible answers of which one is correct. Let X:…

A: X=number of correct answers  n=number of trials=25 p=probability of success= 1/5 =0.2 [because each…

Q: If it is known that the percentage of successful students is 75%, and you take a sample of 15…

A: Givenp=0.75n=15Let "x" be the no.of successful bears x~Binomial(n=15,p=0.75)P(X=x)=(nx)(p)x(1-p)n-x…

Q: Q5. The mean and standard of the weights of identical concrete specimens are 150 and 45 lb…

A: GivenMean(μ)=150standard deviation(σ)=45sample size(n)=50

Q: 80% of beans seeds sprout. Three seeds were planted. Find the distribution of the variable X number…

A: Given : n = 3 P = 0.80 q = 1 - p     = 1 - 0.80 = 0.20

Q: variable Y is twice th

A: It is given that mean of random variable Y is twice the mean of the random variable X. EY=2EX The…

Q: Suppose that the duration of the game is normally distributed. The mean= 10 mins, while the SD= 2…

A: Given, X follows normal distribution(μ,σ) mean , μ = 10standard deviation ,σ = 2

Q: 2. A shipment of 7 television sets contain 2 defective sets. A hotel makes a random purchase of 3 of…

A: I solved exactly first question because of bartleby policy if you want more please upload…

Q: If it is known that the percentage of successful students is 75%, and you take a sample of 15…

A: Given: The percentage of successful students is 75% Sample size n=15

Q: 2. If the mean and variance of a Binomial distribution are 9 and 6 respectively, find the number of…

A: Step 1: Start with the formulas for mean and variance of a Binomial distribution:Mean (μ) =…

Q: A sniper hits a target 80% of the time. He fires five shots at the target. Find  A. Probability…

A: Given problem is binomial distribution Let X: No. of hits n=No. of shots at the target=5 p=prob. of…

Q: c. Let X denote a random variable with mean 4 and variance 2.5. If Y = 2X, calculate the mean and…

A: For a defined random variable Z, and a constant a, using the properties of expectation (or mean), it…

Q: If the mean and variance of a binomial distribution are 4 and 2 respectively. Find the probability…

A: Given,The mean of a binomial distribution is, np = 4The variance of a binomial distribution is,…

Q: A fair coin was tossed three times. Let x be the number of heads. Find the mean and variance o x

A: Given Coin is tossed three times.

Q: The range of the random variable X is {30, 1, 2, 3, a} , where a is unknown. If each value is…

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Q: The variance of 19, 21, 23, 25 and 27 is 8. The variance of 14, 16, 18, 20 and 22 is: a. Greater…

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Q: In a poisson distributed character, the mean number of events is 6. Find the variance.

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Q: From the past experience, 70% of the stocks are profitable. What is the probability that 5 of the 8…

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Q: Suppose it is known that 37% of Camp Crystal Lake campers return the next summer. A random sample of…

A: Given: 37% of the campers return next summer. p=0.37 n=15

Q: e Find the variance of the error in the measured temperature.

A: 3. variance of the error inn the measured temperature is 2....

Q: 3. We throw a dice 10 times consecutively, obtaining the results: 1, 1, 1, 3, 3, 4, 4, 5, 6, 6.…

A: Given: Number of observation, n=10 Result, X 1 1 1 3 3 4 4 5 6 6

Q: The life of light bulbs is distributed normally. The variance of the lifetime is 100 and the mean…

A: We have given that Variance (σ2) = 100 Standard deviations (σ) = √Variance (σ2) = √100 Standard…

Q: The director of research and development is testing a new drug. She wants to know if there is…

A: Solution: State the hypotheses. Null hypothesis: H0: µ≤312 That is, the mean time the drug stayed in…

Q: I need to find the indicated probability for a Mean of 24, an SD of 4.2. P(x > 30)

A: Given info: Here, mean is µ=24 and standard deviation is σ=4.2.

Q: The proportion of a in the tail of a gold distribution can be never be more than .50 true or false

A: We have to find given statement is true or false

Q: Determine the expected number and variance of male children.

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Q: Dandelions are studied for their effects on crop production and lawn growth. In one region, the mean…

A: Since the probability for the given variable (that is discrete in nature), i.e., the probability of…