in a Scores on a scholarship aptitude examination for senior high university in the Visayas are normally distributed with a mean of 70 and standard deviation of 10. What is the highest score that will place an applicant in the bottom 30% lop (30" percentile) of the distribution?

Q: In one region of the Caribbean Sea, daily water temperatures are normally distributed with a mean of…

A: It is given that the mean is 77.9 and standard deviation is 2.4.

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A: Here we use the formula ; z=(x-mean)/standard deviation

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Q: In a sample of 8 hip surgeries, the average surgery times was 131.5 minutes with a standard…

A: GivenMean(μ)=131.5standard deviation(σ)=20.9sample size(n)=8

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Q: In a study of employee stock ownership plans, satisfaction by employees is measured and found to be…

A: Given,mean(μ)=4.89standard deviation(σ)=0.63sample size(n)=450

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A: From the given information, consider X be a random variable denoting score in an IQ test for…

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Q: The results of a nationwide aptitude test in mathematics are normally distributed with mean = 63 and…

A: Normal distribution is a continuous probability density function. Normal distributions are…

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A: Given Data Population Mean,μ = 100.0 Population Standard Deviation,σ = 15.0

Q: 2. A district supervisor of a certain school surveyed 28 randomly selected teachers and found that…

A: For the given problem determine the appropriate test statistics

Q: Suppose that IQ scores have a bell-shaped distribution with a mean of 104 and a standard deviation…

A: Solution According to the Empirical rule.

Q: Suppose that shoe sizes of American women have a bell-shaped distribution with a mean of 8.11 and a…

A: Given that the shoe sizes of American women have a bell-shaped distribution with a mean of 8.11 and…

Q: Assume that the heights of men applying for Us Military training are normally distributed with a…

A: Given, Assume that the heights of men applying for Us Military training are normally distributed…

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

A:

Q: 4. A researcher claims that the standard deviation of the numberof deaths annually from typhoons in…

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Q: If the mean asset turnover for retail firms is 1.91 with a standard deviation of 0.23, without…

A:

Q: The result of a nationwide aptitude test in mathematics are normally distributed with mean =63 and…

A: We have to find 97.5   th percentile value...

Q: Suppose that IQ scores have a bell-shaped distribution with a mean of 104 and a standard deviation…

A: Given, Mean, mu= 104 Standard deviation, sigma= 17 We know that,  Z score= (X-mu)/sigma

Q: The life span of a car​ tire, calculated in​ miles, is normally​ distributed, with a mean of 90,000…

A: Let X be a continuous random variable of life span of a car​ tire (in​ miles) is normally​…

Q: In an article in the Journal of Management, Joseph Martocchio studied and estimated the costs of…

A: If the sample size (n) is large (greater than or equal to 30), then the sample mean follows normal…

Q: Assuming that the heights of college women are normally distributed with mean 65 inches and standard…

A: Solution: Let X be the heights of college women are normally distributed with mean μ= 65 inches and…

Q: 3) A job placement director claims that the average starting salary for nurse is $25000. A sample of…

A:

Q: Suppose that IQ scores have a bell-shaped distribution with a mean of 103103 and a standard…

A: Solution: Let X be the IQ score. From the given information, X follows normal distribution with mean…

Q: A researcher develops a test for selecting intellectually gifted children with a mean of 56 and…

A: It is given that the scores are normally distributed with mean 56 and standard deviation 8. Denote…

Q: Suppose that employees at a large company have salaries that are normally distributed, with a mean…

A: We have given that, Let X be a random variable i.e. salaries of employees are normally distributed…

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

A:

Q: Suppose that IQ scores have a bell shape distribution with a mean of 105 and a standard deviation at…

A: Solution: Let X represent the IQ scores of students.  The distribution of X is bell shape…

Q: The mean score on the exit examination for an urban high school is 66with a standard deviation of…

A: Given  μ=66, σ=6, n=9  We want to find the sample mean(x̄)

Q: Assuming that the heights of college women are normally distributed with mean 65 inches and standard…

A: The normal distribution is the most useful theoretical distribution for continuous variable. For the…

Q: A highway study of 8000 vehicles that passed by a checkpoint found that their speeds were normally…

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

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Q: In order to be accepted into a certain top university, applicants must score within the top 5% on…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: The combined math and verbal scores for females taking the SAT-I test are normally distributed with…

A: Given that  mean of 998 and a standard deviation of 202 P(x<875 )=?

Q: According to a recent survey, the salaries of assistant professors have a mean of $41,750 and a…

A: Solution: Let X be the salaries of assistant professors. From the given information, X follows…

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A:

Q: 1. The average height of all previous contestants in a beauty pageant has been 180 cm with a…

A: The given mean for all previous contestants is 180 cm and standard deviation is 5 cm. That is,…

Q: 1. There are 95% of students at school weigh between 62 kg and 90 kg at Westchester Community…

A: 95% of the data lies between X¯-1.96×σ and X¯+1.96×σ hence we get, X¯-1.96×σ = 62 X¯+1.96×σ = 90…

Q: 2) A job placement director claims that the average starting salary for nurse is $26000. A sample of…

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Q: On the PSAT test taken by about 1.5 million high school juniors each year, the mean score on the…

A: Let , X= score on the reading portion of PSAT Given that X follows a normal distribution with…

Q: SAT math scores are normally distributed with mean (524) and a standard deviation (95). If 1800 SAT…

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Q: Suppose that IQ scores have a bell-shaped distribution with a mean of 96 and a standard deviation of…

A: 17. Empirical rule (68 – 95 – 99.7 rule): For a bell shaped distribution (normal) the empirical rule…

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Q: Suppose the mean net worth of the resi- dents of Sun City, a retirement community, is $611,000…

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Q: A study shows that Michigan teachers have measures of job dissatisfaction that are normally…

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Q: A survey among freshmen at a certain university revealed that the number of hours spent studying the…

A: For standard normal random variable, Mean (µ) = 25 Standard deviation (σ) = 9 X~N (25, 9) Here X be…

Q: Statewide, social workers average 10.2 years of experience. In a random sample, 203 social workers…

A: Given information: μ=10.2, x=8.7, s=0.52, n = 203 Determine the null hypothesis and an alternative…

Q: If commuting times are normally distributed with mean 31.3 minutes and standard deviation 13.2…

A: Mean(µ) = 31.3Standard deviations (σ) = 13.2X ~ N (µ, σ )= N (31.3, 13.2)

Q: According to the American Freshman, the number of hours that college freshmen spend studying each…

A:

Q: In​ 2017, the average credit score for loans that were purchased by a​ government-sponsored mortgage…

A: We want to test the hypothesis