Suppose a research firm conducted a survey to determine the average amount of money steady smokers spend on cigarettes during a week. Sample size is 100. The population mean is $20 and the population standard deviation is $5. What is the probability that a sample of 100 steady smokers spend within $1 of the mean? Determine the standard error Calculate the Z-value (report only 1 of the Z-values) Area

Q: The distribution of the IQ (Intelligence Quotient) is approximately normal in shape with a mean of…

A: Given information: μ=100σ=15 Standard deviation rule: 68% of the data lies between μ-σ,μ+σ95% of the…

Q: Provide descriptive statistics for your program. How many males and how many females were enrolled…

A: As per guidelines we will solve the first question only, please repost other questions for more…

Q: A random sample of shoppers at a convenience store are selected to see how much they spent on that…

A: Standard deviation ,σ = 6.94confidence- level = 0.99So, level of significance = 1-0.99 = 0.01E =…

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

A: Here given situation is of normal distribution, which is continuous distribution. Let X : IQ of…

Q: IQ scores are normally distributed with a mean of 100 and standard deviation 16. Calculate the…

A: The question is about normal dist. Given : Popl. mean of scores ( μ ) = 100 Popl. std. deviation of…

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A: a-1.The data related to the stock prices for corporation A and corporation B is given.Enter the data…

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: IQ test scores are normally distributed with a mean of 98 and a standard deviation of 16. An​…

A:

Q: In an Algebra class, the scores on a test are normally distributed. The middle 68% of the scores…

A:

Q: A set of exam scores is normally distributed and has a mean of 79.3 and a standard deviation of 7.4.…

A: Given datanormal distribution μ=79.3σ=7.4choose a random score less than or equal to this 0.0078we…

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Q: what is the probability that you will receive a grade that is between 89 and 97 on this exam?

A: The mean of grades for the latest statistics exam is 93 and SD is 4.

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A: Given that, A recent study explores the relationship between teacher unions and student educational…

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A: The data in the given table represent the responses of the…

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A: We have to find given probability.

Q: Find the indicated probability. The weekly incomes of a summer intern in Tesla are normally…

A: Given data,Mean μ=1500sd    σ=300P(X<1200)=?

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A:

Q: e z scores to compare the given values. recent awards ceremony, the age of the win the standard…

A: Actor=X , Actress=Y X=35  ,  Mean=47.6 , Standard deviation=6.7 Y=48  , Mean=35.6 , Standard…

Q: The number of trout caught by Professor Sokol each year for the last 10 years is given. 48     61…

A:

Q: In an Algebra class, the scores on a test are normally distributed. The middle 68% of the scores…

A: According to Empirical rule (68-95-99.7 rule) Given that the middle 68% of the scores fall…

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A:

Q: The sick leave time of employees in a firm in a month is normally with a mean of 100 hours and a…

A: Let X be a continuous random variable of employees sick leave time in a firm in month (in hours) is…

Q: that the distribution is normal. What is the chance that three indoor cats die between 15 and 18…

A: here mean= 14 year standard deviation  = 2.5 year

Q: Provide an appropriate response. Use the Standard Normal Table to find the probability.   IQ test…

A: Solution :- Given data :- μ = 105σ = 13x ^ = 122 Using Z-Score Formula :- z=x^-μσ

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

A: Policy: Since you have asked multiple questions, we will solve the first question for you. If you…

Q: Find the indicated probability. The incomes of trainees at tthe local mill are normally distributed…

A:

Q: Roll a pair of die 36 times, and draw a bar graph of all the outcomes. Using the data, find the…

A: In question,  Given that a pair of dice is rolled 36 times. Then we'll find mean Variance and…

Q: A statistics professor gives a survey to each of the 100 students in an introductory statistics…

A: Obtain the population standard deviation:

Q: A successful basketball player has a height of 6 feet 6 ​inches, or 198 cm. Based on statistics from…

A:

Q: A survey of 16 entergy drinks noted the caffeine concentration of each drink in milligrams per…

A: Mean: For a set of n observations, x1, x2, ... , xn mean is given by, Standard deviation: For a set…

Q: Identify the data value corresponding to the indicated percentile. The amount of sleep an adult gets…

A: The normal distribution:A continuous random variable X is said to follow normal distribution with…

Q: SAT tests have a mean of 500 and a standard deviation of 100. They are normally distributed. Amy got…

A: Given data normally distributed with mean = 500 and standard deviation = 100.Let ‘X’ be a normal…

Q: Provide an appropriate response. Use the Standard Normal Table to find the probability. IQ test…

A: Let X be the IQ scores  from normal distribution with mean (μ) = 105, standard deviation (σ) = 11…

Q: A quantitative data set has size 50. At least how many observations lie within three standard…

A: The size of the data set is 50.

Q: Students in the psychology department at General State University consumes an average of 7 sodas per…

A: We have to find correct answer..

Q: Recently, a random sample of 25-34 year olds was asked, "How much do you currently have in savings,…

A: Class  frequency (f) Mid vaue (x) f.x f.x2 0-199 342 99.5 34029 3385885.5 200-399 86 299.5 25757…

Q: Recently, a random sample of 25-34 year olds was asked, "How much do you currently have in savings,…

A: SavingsFrequency$0 - $199330$200 - $39994$400 - $59947$600 - $79919$800 - $99913$1000 - $11997$1200…

Q: The lifespans of lizards in particular zoo are normally distributed. The average lizard lives 3.1…

A: It is given that the lifespans are normally distributed with an average lifespan of 3.1 years.   It…

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.