The Fair Isaac Corporation (FICO) credit score is used by banks and other lenders to determine whether someone is a good credit risk. Scores range from 300 to 850, with a score of 720 or more indicating that a person is a very good credit risk. An economist wants to determine whether the mean FICO score is lower than the cutoff of 720. She finds that a random sample of 100 people had a mean FICO score of 703 with a standard deviation of 92. Can th

Q: Suppose that IQ scores have a bell-shaped distribution with a mean of 103 and a standard deviation…

A:

Q: Many people consider their smart phone to be essential! Communication, news, Internet,…

A: Given information Mean µ = 12.75 hours Standard deviation σ = 2.1 hours

Q: The Pew Internet and American Life Project surveyed 2227 adults in 2011, asking them about their…

A: It is given that the mean number of text messages sent per day is 40.9 for men, 42.0 for women. The…

Q: Location is known to affect the number, of a particular item, sold by Walmart. Two different…

A: given data x¯1  =  39s1 = 9n1 = 9x¯2  = 51s2 = 6n2 = 13α = 0.05claim : μ1 < μ2

Q: Almost all medical schools in the United States require applicants to take the Medical College…

A:

Q: Suppose you plan to take a survey of Math&146 students asked how many miles they commute from their…

A: Given,Confidence Interval = 95%ME= Margin of Error =1.5σ=Population Standard Deviation=5.3

Q: Almost all medical schools in the United States require applicants to take the Medical College…

A:

Q: The Fair Isaac Corporation (FICO) credit scoreis used by banks and other lenders to determine…

A:

Q: A study was conducted to determine the effectiveness of hypnotism on reducing pain. Using standard…

A: Sample 1(before hypnosis): n1=8x¯1=8.713s1=2.177 Sample 2(after hypnosis): n2=8x¯2=5.588s2=2.608

Q: Suppose that IQ scores have a bell-shaped distribution with a mean of 100 and a standard deviation…

A:

Q: In a recent year, the Federal Communications Commission reported that the mean wait for repairs for…

A: GivenMean(x)=22.3standard deviation(σ)=8.3sample size(n)=100

Q: Are low-fat diets or low-carb diets more effective for weight loss? This question was addressed by a…

A: Given that, for a low-carbohydrate diet n1=77, x1=4.7 kg, s1=7.2 kg For a low-fat diet, n2=79,…

Q: Suppose the average golfer drives the ball around 225.55 yards with a standard deviation of 8.82.…

A: Assume that the random variable x denotes the distance of balls drove by the golfer.

Q: An article in the Podunk County Times claims that children in the county watch an average of 3 hours…

A: a) The hypotheses for the test are given below. Null hypothesis: H0: µ = 3 Alternative hypothesis:…

Q: What is the standard deviation of a dataset with the following values: 10, 12, 15, 18, 20?

A: Standard deviation is a measure of the amount of variation or dispersion of a set of values. A low…

Q: A market research firm reported that the mean annual earnings of all family practitioners in the…

A:

Q: Happy Hair will hire only those hairdressers in the top 20 percent based on the amount of time it…

A: Given: Mean= μ== 67.5 Standard deviation= σ = 12.5

Q: Professor Zihni Sinir has 184 students in his college mathematics lecture class. The scores on the…

A: Given: Mean, μ=72.3, Standard deviation, σ=8.9, also the scores are normally distributed.To find,…

Q: accounting examination is 26, how large a sample is needed to estimate the true mean score within 6…

A: HERE GIVEN , n = ??? population standard deviation  =  26  confidence level  = 99%

Q: Many people consider their smart phone to be essential! Communication, news, Internet,…

A: Given that, mean(μ)=10.25 standard deviation(σ)=2.3

Q: Humber's Financial Services Program is offering a post-diploma program, Securities and Investments.…

A: The scores on the admission test are normally distributed with a mean score of 146 and a standard…

Q: Suppose that IQ scores have a bell-shaped distribution with a mean of 101 and a standard deviation…

A: Given that Population mean=101 Standard deviation =14 Using the empirical rule, what percentage of…

Q: The Australian government would like to assess the impact of employment in different sectors on the…

A: Given that 13 men employed in the public sector   and 6 men employed in private sector are surveyed.

Q: based on this graph, would the median be greater than the mean? or the mean gretaer than the median?…

A: Here data is negatively(right) skewedmore data at higher end

Q: Rashid is 84 inches tall. If the height of males in the United States is nor- mally distributed with…

A: Height of Rashid = x = 84 inches. Mean =  70 Standard deviation = 4 The z-score is given by z-score…

Q: Almost all medical schools in the United States require applicants to take the Medical College…

A: (a) Let X be the random variable from normal distribution with mean (μ) = 9.7 and standard deviation…

Q: According to a study conducted by NASA, the average breadth of an adult man's hand is 3.5 inches.*…

A: Formula for z score is as below :

Q: A USA based cable broadband company wants to investigate whether it's east coasts customers have a…

A: According to the given information in this questionWe need to find the value of the test statistic

Q: Location is known to affect the number, of a particular item, sold by an auto parts facility. Two…

A: GivenFor Location A:-sample size(n1)=13Mean(x1)=39standard deviation(s1)=8For Location B:-sample…

Q: Men hoping to have children are encouraged to avoid hot tubs or saunas because heating the scrotum…

A:

Q: An economist would like to estimate the mean amount of money that a family spends to within $45. If…

A:

Q: The U.S. Department of Defence Pentagon structure contains a total of 691water fountains! Let's say…

A: given data normal distributionμ= 12σ = 3.2P(x≥20) = ?

Q: A government board examination has a mean score of 500 points. A review school promises improved…

A: Let μ denotes the population mean score. The government board examination has a mean score of 500…

Q: An experiment was performed to see if the color of paper an exam is printed on could affect scores…

A: Given: Sample mean X¯=70 σ=5 An experiment was performed to see if the color of paper an exam is…

Q: The Fair Isaac Corporation (FICO) credit score is used by banks and other lenders to determine…

A: The hypothesized mean is 720.

Q: Imagine that every elementary school in California is measured on several characteristics and then…

A: From the provided information, Mean (µ) and standard deviation (σ) of the school in Los Angeles…

Q: Using 1% level of significance, test if the population average is not 73.

A: A normally distributed standardized English test is known to have a mean score of 73 and a standard…

Q: Your mother claims that the baby boomer generation is thrifti than the millennials and that boomers…

A: According to the given information in this questionWe need to find test and p value

Q: An economist was curious if the mean yearly amount of seafood consumed in Sweden is significantly…

A: Step 1: Identify the null and alternative hypothesis The researcher wants to determine whether the…

Q: If a prestigious business school will only take those students who score in the top 5%, what score…

A: Let X denote the scores on GMAT. Given that X follows N(mean=527, SD=112). Then Z=(X-mean)/SD…

Q: The Fair Isaac Corporation (FICO) credit score is used by banks and other lenders to determine…

A: Solution: Let µ be the mean FICO score of the population. Let X be the FICO score. From the given…

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.