If a gambler places a bet on the number 7 in​ roulette, he or she has a​ 1/38 probability of winning.   a. Find the mean and standard deviation for the number of wins of gamblers who bet on the number 7 three hundred times.   b. Would 0 wins in three hundred bets be an unusually low number of​ wins?   a. The value of the mean is μ=

Q: The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation…

A: (a)   Obtain the probability that pregnancy will last 307 days or longer. The probability that…

Q: A. Write down the formula for the normal distribution curve. B. Suppose the mean is zero and the…

A: It is widely used in statistics . Normal distribution is also known as the Gaussian distribution .

Q: On a planet far far away from Earth, IQ of the ruling species is normally distributed with a mean of…

A: b. The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the…

Q: For a distribution, the mean was The z-score for a value is negative, which of the following…

A: Z-score is the number of standard deviations, a given data point lies from the mean.

Q: The lifetime risk of developing pancreatic cancer is about one in 78 (1.28%). Suppose we randomly…

A: Given that, The lifetime risk of developing pancreatic cancer is about one in 78

Q: he average price of a college math textbook is $164 and the standard deviation is $27. Suppose…

A:

Q: The weight of a carton of a dozen eggs produced by a certain breed of hens is supposed to be…

A: Note: Hi there! Thank you for posting the question. As there are several independent questions,…

Q: On a planet far far away from Earth, IQ of the ruling species is normally distributed with a mean of…

A: Let X denote the IQ of an individual and it follows normal distribution  The distribution of X is,…

Q: The average number of pounds of red meat a person consumes each year is 196 with a standard…

A: Answer Sample size [n] =50Mean =196Standard deviation =22

Q: 199. If the average cost of a hospital stay is $4200 with a standard deviation of $1000, and…

A: Given Data : Population Mean,μ = 4200 Population Standard Deviation,σ = 1000

Q: The number of ants per acre in the forest is normally distributed with mean 42,000 and standard…

A:

Q: Given that the mean for a data set is 24.8 and the standard deviation is 2.3, find the z-score of…

A:

Q: Ex. 13. If the probability of a defective bolt is 0.2, find (i) mean (ii) standard deviation for the…

A: Givenp=0.2sample size(n)=400

Q: hts per a 12,370. Let X = number o places where possible.

A: Here it is given that X denotes the no of ants in a randomly selected acre of a forest. Mean (μ) =…

Q: 2. Assume that, among residents of a large (over 6,000) Florida subdivision, the population mean age…

A: From the given information, The mean age is 65 and standard deviation is 2 years.

Q: The length of a fully grown hibiscus plants is normally distributed and has a mean of 35cm and a…

A: Given that,Mean(μ)=35standard deviation(σ)=4     The random variable  is length of fully grown…

Q: the number of burglaries in a mean 28. Let X denote the urglaries in the town in a day. ndard…

A:

Q: Medicine. The reaction times (in minutes) of a drug given to a random sample of 12 patients are: 3.3…

A:

Q: The population mean annual salary for plumbers is $49,000.  A random sample of 25 plumbers is drawn…

A: We have given that Mean(µ) = 49000Standard deviations (σ) = 5800n = 24

Q: Suppose that in College Entrance Test, the cutoff score for passing is 85. If the mean of the test…

A:

Q: You have a piggy bank containing approximately $1000.00, all in loonies, and you ask a large number…

A: Mean()=975Standard deviation()=15

Q: school conducted an IQ test to 32 randomly selected students. The standard deviation in the same…

A:

Q: a. What is the distribution of ¤? ¤ - N( b. For the group of 12, find the probability that the…

A: a. The mean is 160, standard deviation is 22, and sample size is 12. The distribution of x¯ follows…

Q: If a gambler places a bet on the number 7 in roulette, he or she has a 1/38 probability of winning.…

A:

Q: score is at or above the 98th percentile. What score would someone need to have in order to get into…

A: The average IQ score is 105 and the standard deviation is 10. MENSA, the high IQ society, only…

Q: uppose that the heights of female adults in the United States are normally distributed with a mean…

A: Solution-: Given: μ=65.4inches,σ=2.8inches We obtained the following: (a) P(X is between 66 and 70…

Q: The chance that you win a game is 60%. How many times on average should an individual play this game…

A: We have given thatProbability (p) = 60% = 0.60Standard deviation ()  = 2.2

Q: The mean of the population is 100 and the standard deviation is 15 (These are IQ values by the way.…

A:

Q: Solve the problem. Assume that mountain lions' weights are normally distributed with a mean of 62.6…

A: We have given that,  X be the random variable from normal distribution with mean (μ) = 62.6 ,…

Q: 50 part-time students were asked how many courses they were taking this term. The (incomplete)…

A: Hi, we are supposed to answer three subparts at a time. Therefore, I am answering the first three…

Q: As a sample gets smaller and smaller, the sample mean tends to get closer and closer to the…

A: According to the law of large numbers (LLN) says that if we take samples of large size from any…

Q: 1. A class had a quiz in Statistics. The scores of the students has a mean of 87 and standard…

A: Given,mean(μ)=87standard deviation(σ)=3

Q: The lifetime risk of developing pancreatic cancer is about one in 78 (1.28%). Suppose we randomly…

A: Given:-              n = 200.             p= 0.0128.  X = number of people who will develop…

Q: The lifetime risk of developing pancreatic cancer is about one in 78 (1.28%). Suppose we randomly…

A: As prof. N. G. Das said "Let there are n trials and each having two outcomes - Success and Failure.…

Q: Find the probability that the mean weight of a sample of 25 bookbags will exceed 7 pounds.

A: Here use central limit theorem and standard normal distribution table for probability from z score

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A: Given that  Mean=265 , Standard deviation=42

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.