Scores on the GRE (Graduate Record Examination) are normally distribute with a mean of 562 and a standard deviation of 134 Use the 68-95-997 Rule to find the percentage of people taking the test who score below 428 The percentage of people taking the test who score below 428 is

Q: A market researcher analyzed how many electronics devices customers buy in a single purchase. The…

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Q: On a standardized exam, the scores are normally distributed with a mean of 39 and a standard…

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Q: Scores on a Literature test have an average of 80 with a standard deviation of 6. What is the…

A: Solution: Let X be the score on a Literature test. From given information, X has mean µ=80 and a…

Q: on a standardized exam, the scores are normally distributed with a mean of 21 and a standard…

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Q: Scores on the GRE (Graduate Record Examination) are normally distributed with a mean of 576 and a…

A: The random variable test score follows normal distribution. We have to find the percentage of people…

Q: The Marks obtained in science by 2500 students is normally distributed with mean 81 % and standard…

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Q: The time required to complete a marathon run is normally distributed with a mean of 360 minutes and…

A: From the provided information, Mean (µ) = 360 minutes Standard deviation (σ) = 15 minutes Let X be a…

Q: On a standardized exam, the scores are normally distributed with a mean of 300 and a standard…

A: To find the z-score of a person who scored 280 on the exam, where the scores are normally…

Q: The salaries of a company's employees are normally distributed with mean 15000 and standard…

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Q: The distribution of height for adult males is approximately normal with mean 67 inches and standard…

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Q: The credit scores of 35-year-olds applying for a mortgage at Ulysses Mortgage Associates are…

A: It is given that the credit scores of 35-year-old individuals who are applying for a mortgage at…

Q: Scores on the GRE (Graduate Record Examination) are normally distributed with a mean of 564 and a…

A: Given that  μ=564 , σ=73

Q: he distribution for the time a patient of a medical center spends waiting for an appointment is…

A: Given data,μ=35σ=12P(11<X<35)=?

Q: Scores of an lQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of…

A: According to the given information, we have Given that the distribution is bell-shaped. Mean = 100…

Q: Find the z-score corresponding to the given value and use the z-score to determine whether the value…

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Q: The standard deviation of the population of IQ score is standardized to be 85 points. Calculate  the…

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Q: The ages of homeowners in a certain subdivision are in comparative dispersion with their incomes.…

A: The Coefficient of variation% (Cv%) is also known as %Relative standard deviation (RSD). The CV%…

Q: (a) What proportion of rods has a length less than 26.8 ​cm?

A: (a) Let x be the length of steel rods which follows normal distribution with mean 27, and standard…

Q: this data has a mean of 7.2 .  5, 7, 9, 10, 5 Calculate the sample standard deviation of this…

A: Central tendency measures the central value of the data set. Mean is a measure of central tendency.…

Q: The Marks obtained in mathematics by 1000 students is normally distributed with mean 78% and…

A: A bell shape curve also called normal distribution which is symmetric about the mean of the…

Q: A group of 894 women aged 70-79 had their height and weight measured. The mean height was 159 chi wi…

A: Solution-: For Height: Given: μ=159cm,σ=5cm For Weight:  Given:μ=65.9kg,σ=12.7kg We find, (a) P[the…

Q: The transmission on a model of a specific car has a warranty for 40,000 miles. It is known that the…

A: Given,mean(μ)=72,000standard deviation(σ)=12,000

Q: A researcher collected the number of letters in each of 200 first names. The data are found to be…

A: We have given that , Mean = 5.82 ,  Standard deviation = 1.43 , We have to find what percentage of…

Q: Scores on the verbal Graduate Record Exam (GRE) are normally distributed with a mean of 600 and a…

A: It is given that exam scores are normally distributed with a mean of 600 and a standard deviation of…

Q: The number of workers employed, the mean wage (in $ per month and standard deviation (in $ .) in…

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Q: Response time is an important statistic for measuring the effectiveness of a fire department, and is…

A: Here, mean is 4.5 and standard deviation is 1.2.

Q: On a standardized exam, the scores are normally distributed with a mean of 550 and a standard…

A: The mean is 550 and the standard deviation is 40.

Q: Body mass index or BMI of 20 year old men is normally distributed with a mean of 23 and a standard…

A: Given that mean= 23 Standard deviation= 3.820    Z score of Allen's BM is 1.25.

Q: Heights in a supopulation of 100 people are normally distributed with a mean of 180 centimeters and…

A: # Height of people follow normal distribution with mean=180 cm and standard deviations=10 cm  Then…

Q: On a standardized exam, the scores are normally distributed with a mean of 140 an a standard…

A: mean = 140 standard deviation =20

Q: Scores on the GRE (Graduate Record Examination) are normally distributed with a mean of 554 and a…

A: Given that  μ=554 , σ=74 Formula for Z-score  Z-score=(X-μ)/σ

Q: The IQ’s in a certain population are normally distributed with a mean score of 104 and a standard…

A: It is given that the scores follow normal distribution with mean 104 and standard deviation 14.…

Q: A special enrichment program in mathematics is to be offered to the top 20% of students in a school…

A: Given ,          Meanμ=57.3         Standard deviation σ=16

Q: A company has a policy of retiring company cars; this policy looks at number of miles driven,…

A: Solution: Let X be the number of months in service for the fleet of cars. From the given…

Q: construct the normal model for data with a mean of 57 and a standard deviation of 6. Show the…

A: It is called empirical rule.  Given, Mu= 57 Sigma = 6

Q: Compute z-scores and use them to compare values from different data sets Question In a recent…

A: From the provided information, The mean price for a 2000 sq ft home in Florida (µF) = $240,000…

Q: A vending machine dispenses coffee into an eight ounce cup. The amounts of coffe dispensed into the…

A: The amounts of coffee dispensed into the cup follow normal distribution with standard deviation 0.03…

Q: Use z scores to compare the given values. In a recent awards ceremony, the age of the winner for…

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Q: ind the required areas under the normal curve if the scores are assumed to be normal distributed…

A: Given: Mean = 50 Standard deviation = 10

Q: he distribution for the time a patient of a medical center spends waiting for an appointment is…

A: Given data,μ=35σ=12P(X>47)=?

Q: A company has a policy of retiring company cars; this policy looks at number of miles driven,…

A: Given:  The number of months in service for the fleet of cars follows normal distribution with mean…

Q: Step 1 of 5:  State the null and alternative hypotheses. Round to four decimal places when…

A: Given that  Sample size n =30 Sample standard deviation s=7.0674 Population standard deviation =13…

Q: Monthly sale figures for a particular e‐retailer tend to be normally distributed with mean equal to…

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Q: Total cholesterol levels for middle aged men (aged 55 64) follow approximately a normal distribution…

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Q: Scores on the common final exam in Elementary Statistic course are normally distributed with mean 75…

A: Let X denote the common final exam in elementary statistic course and it follows normal distribution…

Q: Lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of…

A: Given X is normal Distributed with mean µ = 268.0 and standard deviation σ = 13.0 now will use…

Q: Scores on the GRE (Graduate Record Examination) are normally distributed with a mean of 572 and a…

A: GivenMean(μ)=572standard deviation(σ)=120

Q: The length of human pregnancies from conception to birth berries according to a distribution that is…

A: Obtain the percent of the pregnancy class between 250 and 298 days. The percent of the pregnancy…

Q: Assume all populations are normally distributed. A travel analyst claims that the mean price of a…

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Q: Body mass index, or BMI, of 20-year-old men is normally distributed with a mean of 23 and a standard…

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Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.