Researchers developed a "dog IQ test" and find that the population of dogs in the United States has a mean score of µ = 20 on this test with a standard deviation of σ = 2. You decide to test a sample of n = 40 dogs to do some research about whether some breeds are smarter. You collect your sample of n = 40 dogs and find their mean dog IQ is M = 20.5. What is the probability of this sample? That is, what is p(M>20.5)?

Q: Public health statistics indicate that 26% of  American adults smoke cigarettes. A random sample of…

A:

Q: The mean price of houses in a city is $1.5 million with a standard deviation of $500,000. The house…

A:

Q: Medical research has concluded that people experience a common cold roughly two times per year.…

A: The mean of the normal distribution, The standard deviation of the distribution,

Q: An electrical appliance made by company A has an average life of 2500 hours, with a standard…

A: Given that  An electrical appliance made by company A has an average life of 2500 hours, with a…

Q: A population has a mean of 200 and a standard deviation of 25. A sample of 64 observations will be…

A: We have to find out given probabiity..

Q: A sample of n=30 college sophomores was drawn to assess the number of times per day they open some…

A: Obtain the Z-score for the random variable M equals 40 The Z-score for the random variable M equals…

Q: 9. Suppose X is a random variable with a mean of 10 and a variance of 100. Suppose Y is a random…

A: 9. To find E[10X + 3Y] = 10E[X] + 3E[Y] = 10(10) + 3(2) = 100 + 6 = 106 So, the answer is the second…

Q: CAN SOME HELP ME FIGURE OUT THE ...NULL HYPOTHESIS,ALTERNATIVE HYPOTHESIS, THE TYPE OF TEST…

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub parts for…

Q: he average price of a home in your community is $200,000 with a standard deviation of $30,240. A…

A:

Q: Find the probability that a sample of 18 has a sample mean below 32. The population mean is 24 and…

A: Central Limit Theorem for mean: If a random sample of size n is taken from a population having mean…

Q: Researchers look at the role of music on anxiety.  They believe the type of music will make a…

A: Solution:  Given information: n1=14 Sample size of classical music groupn2=14  sample size of Tecno…

Q: An Industrial Organizational (IO) psychologist got some data from a test they did on productivity.…

A: Given, number of samples (n) = 5 The scores were: 78, 85,64, 90 and 88. Mean (xbar) =…

Q: A survey showed that 75% of adults need correction (eyeglasses, contacts, surgery, etc.) for their…

A: From the provided information, Sample size (n) = 11 75% of adults need correction for their eyesight…

Q: You randomly select 14 student cars and find they have a mean age of 7.3 years and a standard…

A: B)  The p value is 0.0578

Q: There is a common belief that "men marry women who are younger than they are". To test this…

A: We have given the following statement about the hypothesis.

Q: d. What percentage of terminals will last between 2.5 and 4.5 years? e. If the manufacturer…

A: Mean(µ) = 4 yearsStandard deviations (σ) = 10/12 = 0.83 yearX ~ N (µ, σ )= N(4, 0.83)

Q: Accordi v the historical data, the life expectancy in the United States is less than or equal to the…

A: Given: x1 =77.8s1=7.4n1 =250x2 =76.1s2 = 6.2n2 =260α = 0.01

Q: The sales of a salesman average $500 with a standard deviation of $15.2. He gets a $100 commission…

A: The sales of a salesman average $500 with a standard deviation of $15.2. He gets a $100 commission…

Q: A normal population had a mean of 70 and a standard deviation of 12. You select a random sample of…

A: μ = 70σ = 12n = 9P(x¯>73) = ?

Q: If X is a number on standard dice roll, find the standard deviation (o) of X.

A: The random variable is a number on a standard dice roll.If a standard die is rolled, then its…

Q: Business Weekly conducted a survey of graduates from 30 top MBA programs. On the basis of the…

A:

Q: Suppose the random variable X had a population mean u=20 and a population standard deviation o=9. If…

A: Given that: X is normally Distributed with mean µ = 20.0 and standard deviation σ = 9.0 By using…

Q: The grades of a statistics midterm are normally distributed with a mean of 79 and a standard…

A: Normal distributionμ=79σ=3.5pgrade between74 and 80=?

Q: Suppose that we know that 33.8% of the people born in the United States between 1936 and 1951 have…

A:

Q: According to the American Red Cross, 8% of all Connecticut residents have Type B blood. A random…

A: Given Data: X is the number of CT residents that have Type B blood. n=25 p=0.08   Therefore, X~…

Q: According to government data the probability that an adult was never in a museum is 11%, in a random…

A: Givenp=0.11sample size(n)=20Let "x" be the no.that were never in a…

Q: A large tank of fish from a hatchery is being delivered to a lake. The hatchery claims that the mean…

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

Q: You play a game of chance that you can either win or lose (there are no other possibilities) until…

A: Probability of losing (p) the game is 0.61 Probability of winning the game = 1- p = 1- 0.61=0.39

Q: Researchers developed a "dog IQ test" and find that the population of dogs in the United States has…

A: Givenµ = 20 σ = 2

Q: Suppose the random variable X has a population mean u=20 and a population standard deviation o=9. If…

A:

Q: 60% of all the students passed an exam. If a random sample of 10 students is selected, What is the…

A: n=10, p=0.60

Q: Suppose the average credit card debt for Americans is $7000 and is not normally distributed with a…

A: Given information:  Population mean (u) = $ 7000  Sample size (n) = 40 Sample mean (x) = $ 6500…