A Food Marketing Institute found that 32% of households spend more than $125 a week on groceries. Assume the population proportion is 0.32 and a simple random sample of 374 households is selected from the population. What is the probability that the sample proportion of households spending more than $125 a week is less than 0.31?

Q: Suppose that the walking step lengths of males are normally distributed with a mean of 2.5 feet and…

A: We have to find given probability.

Q: The Bank of Canada is interested in studying the relationship between mortgage rates and median home…

A: Given information: Year Interest rate (%)  Median home price 1988 10.3 183,800 1989 10.3…

Q: In a Statistics class, the final exam scores were normally distributed with a mean of 63 and a…

A: Mean, μ = 63 and standard deviation,σ = 5

Q: f) age distribution, find the probability that the age of a randomly chosen cat falls between Q1 and…

A: Given: Age data after sorting. 2 5 7 8 9 10 10 11 11 11 12 12 13 13…

Q: A small ferry runs every half hour from one side of a large river to the other. The number of cars X…

A: The objective of the question is to define the random variable M, which represents the money…

Q: Suppose that the walking step lengths of adult males are normally distributed with a mean of 2.7…

A: Given Data Population Mean,μ = 2.7 Population Standard Deviation,σ = 0.3 sample…

Q: A clinical psychologist is writing a grant proposal. As part of this process, they are required to…

A: Given information- Population mean, µ = 80 Population standard deviation, σ = 12 Sample size, n = 9…

Q: Canadians usually spent around $940 on Christmas presents in 2005. Assume the standard deviation is…

A: Given: Mean=μ=940 and standard deviation=σ=210. Sample size=n=70.

Q: I'm not sure how to solve this: The times that college students spend studying per week have a…

A: Given,sample size(n)=55mean(μ)=7.4standard deviation(σ)=2.6

Q: A manufacturer knows that their items lifespans are normally distributed according to…

A:

Q: Assume the probability that a maple tree at age 5 grows less than 170 cm is equal to 0.25. If the…

A: Given that,  P(X<170) = 0.25 We know that 0.25 is the 60th percentile for normal distribution, Or…

Q: In a recently conducted survey, workers reported driving an average of 36 miles one way on their…

A: Given Population mean = 36miles Population standard deviation =5

Q: The World Health Organization's (W.H.O.) recommended daily minimum of calories is 2600 per…

A: given data  W.H.O. minimum calories = 2600 μ = 2460σ = 500n = 49P(x¯ >2600) = ?

Q: A study involving stress is conducted among the students on a college campus. The stress scores…

A: The mean is, μ=a+b2=1+52=3 The mean is 3. The standard deviation is, σ=b-a212=5-1212=412=1.1547 The…

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: Given that the mean weight of schoolchildren's book bags is 17.5 pounds, with a standard variation…

A: We have given that Population mean = 17.5 Standard deviation = 2.2 Sample size n =30

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

A: We are given,μ = 196σ = 22n = 60

Q: The mean weight of an adult is 62 kilograms with a variance of 144. If 195 adults are randomly…

A:

Q: Suppose a batch of metal shafts produced in a manufacturing company have a standard deviation of 2.4…

A: Given Information: Mean μ=209 Standard deviation σ=2.4 Sample size n=69

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: High blood pressure has been identified as a risk factor for heart attacks and strokes. The National…

A: Given data: p = 0.3 n = 38

Q: In a recent survey of high school students, it was found that the average amount of money spent on…

A: It is given that ,  in a recent survey of high school students, it was found that the average amount…

Q: (b) What is the probability that the sample mean is within 1 inch of the population mean for…

A: The state of California has a mean annual rainfall of 22 inches, whereas the state of New York has a…

Q: The cost of 5 gallons of ice cream has a variance of 36 with a mean of 31 dollars during the summer.…

A: Given,sample size(n)=39standard deviation(σ)=36=6mean(μ)=31

Q: The Bureau of Labor Statistics reported in a recent year that 5% of employed adults in the United…

A: From the given information we can write that, Proportion of employed adults in the United States who…

Q: In Canada, households with internet spent an average of $410 annually for access. This distribution…

A: Solution: Given information: n= 600 Sample size μ=$410 Population meanσ=$138 Population standard…

Q: A toy manufacturer wants to know how many new toys children buy each year. Assume a previous study…

A: It is given that, Population variance is 1.44. The z-critical value for 85% confidence interval is…

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

A:

Q: use a ti84 device to solve The quality control manager at a computer manufacturing company believes…

A: From given data we have : Population mean is μ=97 Population standard deviation  (variance…

Q: The average time spent by a car salesman each weekend is normally distributed with a mean of 12.5 hr…

A: Given Information: Meanμ=12.5hrS.Dσ=3hr

Q: In the 1992 presidential election, Alaska's 40 election districts averaged 2110 votes per district…

A: Given: X=Number of votes for president Clinton for an election district X~Normalμ=2110, σ=575

Q: Suppose that the walking step lengths of adult males are normally distributed with a mean of 2.72.7…

A: Answer  Given  a mean of 2.7 feet and a standard deviation of 0.2 feet. A sample of 63 men’s step…

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: A government sample survey plans to measure the total cholesterol level of an SRS of men aged 20-34.…

A: Note: As it is not logical that “the probability that x falls within + or -2 milligrams per…

Q: A racing car consumes a mean of 103 gallons of gas per race with a variance of 36. If 38 racing…

A: The probability of the sample mean would be greater than 101.5 gallons is 0.9382 and it is obtained…

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.