In an experiment, 50 people were blindfolded and asked to pick an object from a mug. Each mug had a pen, an eraser, and a pencil. Assume that picking a pencil was a success. The sample proportion of successes of this sample of 50 people has 60% probability to be less than a certain proportion. Assume that the sampling distribution is normal. What is that proportion? Round your answer to two decimal places. Do not include units in your answer.

Q: In a study of births in 2007, it was found that 51% were male and 49% were female. If 100 people are…

A: Given that there are 51% are male and 49% are female & if 100 people selected randomly we have…

Q: For a normal distribution with M = 80 and SD = 12: (a) what is the probability of randomly…

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Q: what is the probability that x<70?

A: Let , X→N(μ=100 , σ=10) Our aim is to find the P(X&lt;70)

Q: Is the following statement true, or false? Answer using the pull down menu. 1. As a general rule,…

A: Is the following statement true, or false? Answer using the pull down menu. 1. As a general rule,…

Q: Assume a random sample. What effect does increasing the sample size have on a. the probability of…

A: We know that, Type 1 error = P( reject H0 / H0 true ) Type 2 error = P( accept H0 / H0 false ) Power…

Q: The sampling distribution of the mean, with N=30, of a moderately negatively skewed distribution is:…

A: If the probability distribution, with N=n, of a moderately negatively skewed, then the shape of the…

Q: An elementary school teacher is interested in assessing how students' performance varies with the…

A: The sampling is the process that used to take sample from the population. The sampling is broadly…

Q: In a study of life expectancy in a certain region, the mean age at death was 70 years, and the…

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Q: In a negatively skewed distribution of scores, what is the probability of sampling a z-score less…

A: We have to find the probability that In a negative skewed distribution , z-score is less than 1 .…

Q: The president of Doerman Distributors, Inc. believes that 30% of the firm's orders come form first…

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Q: Economists often track unemployment trends by measuring the proportion of people who are…

A: We have to find test statistics..

Q: In a hypothesis test, the following random sample of six observations was selected from a normal…

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Q: A college entrance exam company determined that a score of 20 on the mathematics portion of the exam…

A: Since you have posted a question with multiple subparts, we will solve first three subparts for you.…

Q: Suppose a random variable Y has a chisquare distribution with 18 degrees of freedom, then the 10th…

A: Given : Degree of freedom, df = 18

Q: A normal distribution has μ = 20 and σ = 4.  What is the probability of randomly selecting a score…

A: Obtain the probability of randomly selecting a score greater than 25 from this distribution. The…

Q: If random samples, cach with n- 25 scores, are selected from a normal population with u - 50 and o-…

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Q: Given a normal distribution with μ=50 and σ=4​, and given you select a sample of n=100​, What is…

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Q: Given a normal distribution with μ=101 and σ=25​, and given you select a sample of n=25​, What is…

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Q: Refer to the sample data for polygraph tests shown below. If one of the test subjects is randomly…

A: probability is defined by = favourable outcomes/ total outcomes -We have to find the probability of…

Q: In a 4-week study about the effectiveness of Do you Feel Better? using magnetic insoles to treat…

A: The total n1=55 subjects wore magnetic insoles out of which only x1=15 subjects feel better. And…

Q: . A simulation was conducted using 10 fair six-sided dice, where the faces were numbered 1 through…

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Q: A random sample of n = 16 scores is selected from a normal distribution with μ = 500 and σ = 200.…

A: From the given information,Sample size = 16,Population mean = 500,Population standard deviation =…

Q: Suppose a random variable Y has a chisquare distribution with 12 degrees of freedom, then the 5th…

A: Given : Degree of freedom, df = 12

Q: The test scores of a physics class with 800 students are distributed normally with a mean of 75 and…

A: Given Information: The test scores of a physics class with 800 students are distributed normally…

Q: (b) If the mean of a random variable X is 40, what will be the mean of the sampling distribution of…

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Q: Given a normal distribution with μ=101 and σ=25​, and given you select a sample of n=25​, What is…

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Q: on a particular Saturday. On a typical Saturday, how many cars does he expect to sell? What is the…

A: Here , we want to find the following :  a) How many cars does he expect to sell b) Variance

Q: Given a normal distribution with μ=103 and σ=15​, and given you select a sample of n=9​, What is…

A: Given : A normal distribution with μ=103 and σ=15​ n = 9

Q: A bag of marbles contains the following assortment of marbles.   Blue Blue Blue Green Blue Blue…

A: As per our guidelines we are suppose to answer first question. Given,total no.of marbles =15 no.of…

Q: Your population is comprised of 1,000,000 potential customers. Your marketing department has…

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Q: of 1,000,000 potential customers.  Your marketing department has segmented/stratified this market as…

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Q: At a small local college, 78% of all students are receiving some kind of financial aid. A local…

A: The formula of the standard deviation of the sampling distribution is,

Q: Is the following statement true, or false? Answer using the pull down menu. ? v 1. As a general…

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Q: when doing planned comparisons ? A. a different sampling distribution is used to correct for the…

A: Type-I error: Type-I error is rejecting the null hypothesis H0, when the null hypothesis H0 is true.…

Q: Given a normal distribution with μ=103 and σ=15​, and given you select a sample of n=9​, What is…

A: Given that μ = 103 σ = 15 we need to calculate the P ( X &lt; 92 )

Q: a. Obtain the cdf of X. b. What is P(X ≤ .5)? c. Using the cdf from (a), what is P(.25 < X ≤ .5)?…

A: we have the pdf, f(x) = 90x8(1-x)= 90(x8-x9) for 0&lt;x&lt;1 we want to find, a. Obtain the cdf of…

Q: You are told 20% of plain M&M’s are green. In a random sample of 500 plain M&M’s you find that 123…

A: Given Information: 20% of plain M&amp;M’s are green. i.e., p=0.20 Sample size n=500 plain M&amp;M's…

Q: The manager of Lawn and Garden Services would like to estimate the proportion of her employees' time…

A: Given Information: Activity Time observed Mowing 200 Trimming 80 Raking 40 Miscellaneous…

Q: 5. In your population with a sex-ratio of 30 percent males (frequency = 0.30) and 70 percent females…

A: Given: Male = 30% = 0.30 Female = 70% = 0.70

Q: Given a normal distribution with μ=50 and σ=4​, and given you select a sample of n=100​, What is…

A: Given : μ = 50σ = 4n = 100

Q: In looking at the results of a standardized exam, 72% of those taking the test choose the correct…

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Q: An industrial psychologist feels that a big factor in job turnover among assembly line workers is…

A: Given data is :

Q: 4. According to a 2019 Federal Reserve report, 54% of U.S. young adults who went to college took on…

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Q: Given a normal distribution with μ=103 and σ=15​, and given you select a sample of n=9​, What is…

A: GivenMean(μ)=103standard deviation(σ)=15sample size(n)=9

Q: Given the following data for an imaginary superhero universe: Flying Telepathy Super Strength Female…

A: The table given in the problem represents the superhero data. From the table, The total number of…

Q: An engineer believes that 4% of a certain manufactured product are manufactured with a flaw. If one…

A: Given: Hypothesized proportion of flawed objects (p) = 4% = 0.04 Sample size (n) =  36

Q: Given a normal distribution with μ=100 and σ=8​, and given you select a sample of n=16​, What is the…

A: Solution: From the given information, X follows normal distribution with mean µ=100 and a standard…

Q: A person who is interested in estimating the proportion of Reese’s Pieces that are orange collects a…

A: Hello there! there are more than three sub parts in the given question. According to our policies…

Q: Given a normal distribution with μ=50 and σ=4​, and given you select a sample of n=100​, What is…

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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.