A Food Marketing Institute found that 58% of households spend more than $125 a week on groceries. Assume the population proportion is 0.58 and a simple random sample of 146 households is selected from the population. What is the probability that the sample proportion of households spending more than $125 a week is more than than 0.48? Note: You should carefully round any z-values you calculate to 4 decimal places to match wamap's approach and calculations.

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Q: The mean percent of childhood asthma prevalence in 43 cities is 2.34%. A random sample of 31 of…

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Q: According to the Department of Education, 60% of college students enjoy taking Statistics. Suppose…

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Q: A courier service company wishes to estimate the proportion of people in various states that will…

A: number of samples, n = 330 true proportion, p = 0.05 Let, p^ be the sample proportion.  Hence p^…

Q: Compute the test statistic. Round to two decimal places.

A: Sample size, n=2027 No. of adults who drank diet soda, x=485

Q: The population average annual salary for high school teachers in Alhambra is $61,244. A random…

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Q: The mean GPA of university students is 2.3 with a standard deviation of 1.2. If you were to draw 36…

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Q: Cody took his first physics exam and scored an 80. The population mean for this exam is 70, and the…

A: Solution: It is given that, Population mean, 70 Standard deviation, 5 Given that Cody took his first…

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

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Q: b. Find the probability that a randomly hit fly ball travels less than 330 feet. Round to 4 decimal…

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Q: A research firm claims that the distribution of the days of the week that people are most likely to…

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Q: If a probability or 2 place decimal like area is found to be 077 or - 1.09 0.4377, what is the z…

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Q: there is 70% chance they should hit atleast how many pitches this season?

A: Given that, there is 70% chance they should hit.

Q: A sample has SS= 20 and s2 =4. How many scores are in the sample?

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Q: furnace bills are normally distributed.  With a mean of 273 and an SD of 30.  If 144 bills are…

A: Let M denote the mean of sample of n = 144 bills. Then M follows N(mean = 273, SD = 30/√(144) = 2.5)…

Q: Michelle, a telemarketer makes six phone calls per hour and is able to make a sale on 30% of these…

A: The question is about discrete probability distribution Given : No. phone call telemarketers makes…

Q: Find the critical value. The critical value is zo =. %3D

A: Given α=0.10

Q: A claim is made that 85% of college students own a smartphone. Natalie believes that a larger…

A: Let p be the population proportion  p=0.85, x= 135, n=150  p^=x/n

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: d. The degrees of freedom = e. The test-statistic for this data (Please show your answer to three…

A: d. Degrees of freedom: df=number of categories-1   =4-1   =3

Q: Solve the following problem and show your complete solutions. Explain your answer for better…

A: The length of time that a phone will work before it needs charging is normally distributed with mean…

Q: a fast food center wants to estimate the proportion of people in its city that will purchase its…

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Q: loaded my die so that the chance of a 1 is 0.1, the chance of a 6 is 0.2, and the chances of the…

A: Use ∑P(x) =1   to find the remaining probability

Q: The middle 95% of a group of 1000 students got scores ranging from 50 to 90 on a math test. If the…

A: Normal Distribution: Understand the properties of the normal distribution, including the mean (μ)…

Q: 1. How are the collection of all sample proportions of samples of size 172 distributed? NO 2. What…

A: Given Information: Sample size (n) = 172 studentsPopulation Proportion (p) = 0.51. The distribution…

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

A: From the provided information, Mean (µ) = 100 Standard deviation (σ) = 15

Q: The distances golf balls travel under laboratory testing conditions are normally distributed. The…

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Q: The Powerball lottery jackpot has a winning probability of 1/189,000,000.  If you only consider the…

A: From the given information, Consider, X is the random variable that shows the net gain.  Pr(winning…

Q: The Normal model N(150,10) describes the distribution of scores on the LSAT, a standardized test…

A: Solution : Given : X : Scores on the LSAT and X ~ N(150,10) i.e. μ = 150      σ2 = 10 a. Type of…

Q: The chances of a pine tree in a particular forest being effected by the pine beetle is 10 percent.…

A: Given data  P(infected by pine beetle) = p = 0.10 x = no. of trees affected by pine beetle P(x=X) =…

Q: Suppose that insurance companies did a survey. They randomly surveyed 400 drivers and found that 310…

A: Given: Sample size (n) =400 Number of  drivers claimed (x) = 310

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.