A consumer survey indicates that the average house- hold spends u = $185 on groceries each week. The distribution of spending amounts is approximately normal with a standard deviation of o = $25. Based on this distribution, %3D

Q: The duration of routine operations in a certain hospital has approximately a normal dist with a mean…

A: Let X be the duration of routine operations in a certain hospital has approximately a normal…

Q: Ultrasound was used to gather the accompanying corrosion data on the thickness of the floor plate of…

A:

Q: A consumer survey indicates that the average household spends μ = $185 on groceries each week. The…

A: From the provided information, Mean (µ) = $185 Standard deviation (σ) = $25 Let X be a random…

Q: A major department store has determined that its customers charge an average of $500 per month, with…

A:

Q: The systolic blood pressure for a healthy person is normally distributed with a mean of 120 and a…

A: Correct Answer is  (d) 118.95

Q: A quantitative data set has size 40. At least how many observations lie within two standard…

A: Introduction: Suppose X is a random variable with expectation, μ and standard deviation, σ. Then,…

Q: A certain machine makes electrical resistors having a mean resistance of 50 ohms and a standard…

A: Let, X= resistance Given that X follows a normal distribution with mean=50 and standard deviation=4…

Q: Compute the Average Deviation.

A:

Q: The results of a calculus exam are normally distributed with a mean of 76 and a standard deviation…

A: Obtain the Z-score for the random variable that X equals 70. The Z-score for the random variable…

Q: The data set has size 50. Approximately how many observations lie within one standard deviation to…

A:

Q: The length of time it takes a Grade 11 student to play the Candy Crush computer app follows a normal…

A: Given that  The length of time it takes a grade 11student to play the candy crush computer is…

Q: On a standardized exam, the scores are normally distributed with a mean of 35 and a standard…

A:

Q: The height of adult men in the United States is normally distributed with a mean of 70 inches and a…

A: Z = -0.67 Mu = 70 S = 3

Q: The diameters of watermelons at a local supermarket are normally distributed with a mean of 10…

A: Let X denote diameters of watermelons at a local supermarket. Given that X follows Normal(mean = 10,…

Q: A particular battery claims to have a mean life of 400 hours with a standard deviation of 30 hours.…

A: Mu=400, sigma=30 P(X>420)= ?

Q: The scores from a state standardized test have a​ bell-shaped distribution with a mean of 100 and a…

A: By using empirical rule we know…

Q: GMAT scores are approximately normally distributed with a mean of 547 and a standard deviation of…

A:

Q: The mean length of a human pregnancy is 267 days, with a standard deviation of 12 days. Use the…

A: Given data,Mean μ=267sd σ=12P(243<X<291)=?

Q: A data set of home sales prices in an area has an average selling price of $350,000 with a standard…

A: The z score for x = 390000 is calculated as:

Q: A major credit card company has determined that the amount its customers charge on their accounts is…

A: Given that, Mean = 2800 Standard deviation = 200 Number of customers = 20000

Q: A store sells meat in smallmedium and large size packages. The small packages have a mean weight of…

A: Here given that, Mean, mu= 1 And standard deviation, sigma= 0.1 Z score is given by, Z score=…

Q: The annual commissions per salesperson employed by a retailer of mobile communication devices…

A: Obtain the Z-score for the random variable $32000.   The Z-score for the random variable $32000 is…

Q: The fill volume of an automated machine used for filling cans of water is normally distributed with…

A: Consider, X be the random variable that shows the filling cans of water ( volume) which is normally…

Q: The mean height of trees in the virgin forest of Zambales is 42 feet and the standard deviation is 3…

A: The mean height of trees in the virgin forest of Zambales is 42 feet and the standard deviation is 3…

Q: A store sells meat in small, medium and large size packages . The small packages have a mean weight…

A: Given that small packages have a mean weight of 1 pound and a standard deviation of 0.1 pound. i.e.…

Q: The lengths of a large stock of titanium rods follow a normal distribution with a mean (u) of 440 mm…

A: Given that, The lengths of a large stock of titanium rods follow a normal distribution with a mean…

Q: Use the output provided in the formula sheets folder. Using the reduced model, what is the value of…

A: Based on given output we have to determine the estimate of standard deviation i.e S

Q: The annual incomes of middle management employees is approximately normally distributed with a mean…

A:

Q: The mean length of a human pregnancy is 265 days, with a standard deviation of 14 days. Use the…

A:

Q: A quantitative data set has size 50. At least how many observations lie within three standard…

A: The size of the data set is 50.

Q: On a construction site, the amount of dirt scooped by a forklift machine is normally distributed…

A:

Q: de . Find the standard deviation of the observations 5, 11, 18, 25 and 41, using muill

A:

Q: A set of data items is normally distributed with a mean of 40 and a standard deviation of 8. Convert…

A: Given:  Random variable x follow normal distribution with mean mu=40 ,sd=8  Then z score:…

Q: A given set of data has a specific standard deviation. Describe what will happen to the standard…

A: Answer: The standard deviation of new data is remains same as original data. As a general rule, the…

Q: The average birth weight of elephants is 230 pounds. Assume that the distribution of birth weights…

A: Given,mean(μ)=230standard deviation(σ)=50

Q: A small grocery store, on average, has daily sales of Php28, 176.44. The standard deviation of sales…

A: Solution: Let X be the daily sales. From the given information, µ = Php 28,176.44 and σ = Php 1500.

Q: A health study reported​ that, in one​ country, systolic blood pressure readings have a mean of 122…

A:

Q: A local university administers a comprehensive examination to the recipients of a B.S. degree in…

A: The sample standard deviation can be calculated as:

Q: The following data give the speeds (in kilometer) as measured by radar of 5 selected cars traveled…

A: The data shows the speeds (in kilometer) as measured by radar of 5 selected cars traveled at NLEX.

Q: The mean length of a human pregnancy is 269 days, with a standard deviation of 10 days. Use the…

A: According to empirical rule.

Q: The lifetime of a 2-volt non-rechargeable battery in constant use has a Normal distribution, with a…

A:

Q: The National Weather Service keeps records of snowfall in mountain ranges. Records indicate that in…

A: Given Data: μ=85σ=16n=64

Q: A quantitative data set has size 60. At least how many observations lie within three standard…

A:

Q: Write down the formulas for the standard deviation of p.

A: Let sample size = n Sample proportion = p̄

Q: An instructor in a large lecture class found, at the end of the semester, that the total point…

A: It is given that mean and standard deviation are 530 inches and 80, respectively.

Q: The weight loss for the first six months of a diet program is normally distributed with an average…

A:

Q: The reading speed of sixth grade students is approximately normal with a mean speed of 115 word per…

A: Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: The data set has size 80. Approximately how many observations lie within two standard deviations to…

A: Empirical rule: On a normal distribution about 68% of data will be within one standard deviation of…

Q: The variance in a data set is 427. Find the standard deviation. Round to two decimals.

A: The random variable is X. It is given that the variance is 427. We have to find the standard…

Q: A survey indicates that the customers of a local supermarket spend an average of 45 minutes shopping…

A: The customer of local supermarket spend an average of 45 minutes for shopping. The standard…

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.