26 Suppose that 12.5% of horses live over 23.4 years, while 88 8/9% live less than 25.2 years. What are the mean and standard deviation for the life expectancy of horses? *

Q: Test the claim that the mean age of the population in Sin City is less than 26 years. Sample data…

A: Solution: Let X be the age. From the given information, x-bar = 24.4 years, S=9.2 years and n=25.

Q: 7. mean = 60; standard deviation = 6

A: It is given that: μ mean=60 and σ standard deviation=6.

Q: Salaries paid for all workers last year had a mean of $45,000 amd a standard deviation of %5,500.…

A:

Q: Explain the the Chi-Squared Distribution?

A:

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 14.2…

A:

Q: Scores on a history test have average of 55 with standard deviation of 10. What is the probability a…

A:

Q: An IQ score has a mean, u = 90, and standard deviation, o = 10. (5PTS EACH) 1. A genius is sometimes…

A: 5. Mean = 100, Stdev = 10 a. PX≥140 = PZ≥ 140-100 10 = P(Z≥ 4) = 0.000031

Q: . What is the probability that a person spends less than 37.0 minutes shopping for groceries?   b.…

A:

Q: About 68.2% of the scores fall within the normal curve, which ranges from 50 to 80 and is symmetric…

A:

Q: IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. Find the IQ…

A: Excel formula: =NORMINV(0.305,0,1)=-0.5100

Q: Assume that adults have IQ scores that are normally distributed with a mean of μ = 105 and a…

A: Let x be an IQ scorewant to find the probability that the IQ score is less than 135i.e. P(X<135)

Q: A study on the body mass index (BMI) reported that the distribution of the BMI is lognormal for…

A: Let X be the women aged 35-45 P(X<24.5)=?

Q: Assume that adults have IQ scores that are normally distributed with a mean of μ = 100 and a…

A: Given that  X ~ N(μ = 100 , σ = 15 ) μ = 100  , σ = 15 Formula for Z-score Z = (X - μ) / σ

Q: Suppose that the lifetimes of TV tubes are normally distributed with a standard deviation of 1.2…

A:

Q: State two of the main reasons for studying the normal distribution.

A: The two main reasons for studying the normal distribution are as follows:The normal distribution is…

Q: A company sells printers with a mean life of 2 years (24 months) and a standard deviation of 4…

A: GIVEN: mean = 24 months           standard deviation = 4 months

Q: b Find the probability that the college graduate has between $15,050 and $21,200 in student loan…

A: Given  Mean= 25400S Standarddeviation = 10950 Find P(15050<X<21200)=?

Q: The average life expectancy for women in Australia calculates out at 89 years and the standard…

A: given mean=89standard deviation 8.2

Q: IQ scores have a bell-shaped distribution with a mean of 100 and a standard deviation of 15. a. What…

A: Given DataMean = 100Standard Deviation = 15

Q: 6-The mean number of hours an American worker spends on the computer is 3.1 hours per workday.…

A: Mean(μ)=3.1 Standard deviation(σ)=0.5

Q: how do you find standard deviation? how many bars should you have for a standard deviation? do you…

A: Introduction:The standard deviation of a set of observations is the square root of the average of…

Q: Scores on a history test have average of 80 with standard deviation of 5. What is the probability…

A: From the provided information, Mean (µ) = 80 Standard deviation (σ) = 5 X~N (80, 5)

Q: The random variable x represents the number of emails received at a help desk in one hour, and it…

A: given data, random variable x represent the number of emails received at a help desk in one hour…

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: In a normal distribution, x = 6 and z = 1.25. This tells you that x = 6 is ____ standard deviations…

A: It is given that Value x = 6 Z-score = 1.25

Q: Q scores based on the Wechsler Adult Intelligence Scale (WAIS) are assumed to be normally…

A: Given data,Mean μ=100standard deviation σ=15Score is x=125z-score=?

Q: lizards and standard deviation of 9 lizards. What would be the probability that a randomly selected…

A: Let X be the random variable the amount of lizards a person sees during a hike.Given that,

Q: Determine whether the following statement is true. If data are from a normal distribution, according…

A: The objective of the question is to verify the truthfulness of the statement related to the…

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: The WAIS is an IQ test. Scores on the WAIS for the 20-34 age group are normally distributed with a…

A: It is given that the mean and standard deviation for the age group of 60-64 is 90 and standard…

Q: LSAT test scores are normally distributed with a mean of 151 and a standard deviation of 5. What…

A: Given; Mean=μ=151SD=σ=5 Let X be a random variable which is normally distributed with mean 151 and…

Q: afactory manufactures car tyres that have an average lifetime of 45261 kilometers with a standard…

A: Given: X~N(μ,σ)μ=45261Kmσ=2761Km

Q: Hello. I appreciate any help. Thanks.

A: Degrees of freedom:The number of degrees of freedom is the number of values in the final calculation…

Q: ose return is normally distributed with mean of 8% and a standard deviation of 5%. A. Determine the…

A: When the percentage of return is less than 0% the person will loose money.

Q: % of all data lies within one standard deviation to the left of mean  % of all data lies with two…

A: We will use the Empirical rule

Q: Suppose IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What…

A: Let us denote the IQ scores as X follows normal distribution mean 100 and standard deviation of 15.…