A survey indicates that the customers of a local supermarket spend an average of 45 minutes shopping with a standard deviation of 12 minutes. The lengths of time spent in the supermarket are normally distributed, which are represented by the variable XX. How many shoppers among a population of 200 people spend 24 to 54 minutes in the supermarket?

Q: The trunk diameter, in centimeters,  of a certain variety of pine tree is represented by X~N(150,…

A: Let X denote the trunk diameter in centimetres of a certain variety of pine tree and it follows…

Q: A company pays its employees an average wage of $22.50 an hour with a standard deviation of $2.30.…

A: Given data: Mean = $22.50 an hour standard deviation = $2.30 To find: What is the highest 5% of the…

Q: For a population with a standard deviation of 40, how large a sample is necessary to have a standard…

A: We want to find the sample size

Q: If we know that the length of time it takes a college student to find a parking spot in the library…

A: # X be the  length of time it takes a college student to find a parking spot in the library parking…

Q: The average time it takes a certain brand of ibuprofen to start working is 25 minutes, with a…

A: The mean of the sampling distribution of the sample mean is represented as and is given by

Q: A factory produces LED bulbs with an average lifespan of 50,000 hours and a standard deviation of…

A: The top 10% of bulbs last for at least how long is obtained below:From the given information, the…

Q: A livestock company reports that the mean weight of a group of young steers is 1157 pounds with a…

A:

Q: Steel rods are manufactured with a mean length of 27 centimeter​ (cm). Because of variability in the…

A: Given Data Population Mean,μ = 27.0 Population Standard Deviation,σ = 0.06

Q: The students in an AFDA class have a mean height of 66 inches and a standard deviation of 7 inches.…

A: Mean(µ) = 66Standard deviations (σ) = 7

Q: A set of data items is normally distributed with a mean of 80 and a standard deviation of 9 .…

A: Given A set of data is normally distributed with mean of 80 and standard deviation of 9 and x=71.so,…

Q: A local chain of coffee shops is collecting data on the time each customer spends in line before…

A: The histogram shows the frequency of each number of minutes spent waiting in line.

Q: According to the National Association of Colleges and Employers, the 2015 mean starting salary for…

A: (d) Determine the new college graduate in business have to earn in dollars in order to have a…

Q: The average number of acres burned by forest and range fires in a large New Mexico county is 4,300…

A: GivenMean(μ)=4300standard deviation(σ)=750

Q: A company pays its employees an average wage of $22.50 an hour with a standard deviation of $2.30.…

A: The z score is used to test the probability of normal distribution. It is also known as standard…

Q: In a mango farm of 250 trees, the mean harvest is 96.5 kilos of fruit per tree with a standard…

A: Given,sample size(n)=250mean(μ)=96.5standard deviation(σ)=8.4

Q: The mean life of a battery is 55 hours with a standard deviation of 6 hours. The manufacturer…

A:

Q: Suppose that the mean retail price per gallon of regular grade gasoline in the United States is…

A: Mean = 3.49 Standard deviation = 0.20

Q: The mean weight of 500 male students at a certain college is 80 kg, and the standard deviation is 8…

A:

Q: A batch of 1500 bottles have an average contents of 753 ml and the standard deviation of contents is…

A: Given information- Population mean, µ = 753 ml Population standard deviation, σ = 1.8 ml Sample…

Q: Steel rods are manufactured with a mean length of 27 centimeter​ (cm). Because of variability in the…

A: Given,mean(μ)=27standard deviation(σ)=0.06

Q: A survey by the National Retail Federation found that women spend on average $146.21 for Christmas.…

A: Given: μ=$146.21, σ=$29.44

Q: The amount of time a certain brand of light bulb lasts is normally distribued with a mean of 1500…

A:

Q: The average starting salary for graduates at a university is $33,000 with a standard deviation of…

A:

Q: Soum that the red blood cell counts of women are normally distributed with a mean of 4.577 million…

A: Solution: Let X be the red blood cell counts of women. From the given information, X follows normal…

Q: A population has a standard deviation of 18 on average how much difference should exist for a random…

A: From the provided information, Population standard deviation (σ) = 18 Sample size (n) = 36

Q: The weight of oranges growing in an orchard is normally distributed with a mean weight of 6 oz. and…

A: It is given that the mean is 6 and the standard deviation is 1.5.

Q: The weights of oranges in a harvest are normally distributed, with a mean weight of 150 grams and…

A: From the provided information, Mean (µ) = 150 Standard deviation (σ) = 10 Let X be a random variable…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 262 days…

A: Let X be the lengths of pregnancies in a small rural village x¯=262sd=16 X~ Normal (262, 162)   For…

Q: The results of a national survey showed that on average, adults sleep 6.9 hours per night.Suppose…

A:

Q: Suppose that water usages in American showers are normally distributed, with an average shower using…

A: Given Information: μ=20 and σ=3.2 (b) To estimate the percentage of showers that used more than 26.4…

Q: A maths class has 100 members. If there is a 15% absentee rate per class meeting , find the standard…

A:

Q: A population has a standard deviation of 18 on average how much difference should exist for a random…

A: A population has a standard deviation of 18.

Q: ccording to a survey on part-time workers, the average base salary for women in sales is higher than…

A: Let X denotes the average base salary for men  Given: = $2500/month Converting it to 12 moth period,…

Q: A livestock company reports that the mean weight of a group of young steers is 1180 pounds with a…

A: GivenMean(μ)=1180standard deviation(σ)=90

Q: A livestock company reports that the mean weight of a group of young steers is 1121 pounds with a…

A: From the provided information, Mean (µ) = 1121 pounds Standard deviation (σ) = 79 pounds Let X be a…

Q: One of the ways in which doctors try to determine how long a single dose of pain reliever will…

A: According to the given question, A report of the National Institutes of Health states that the…

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: In order to determine the average weight of carry-on luggage by passengers in airplanes, a sample of…

A: 1.   From the given information, the sample size is 250.  The population standard deviation is 2.5.…

Q: in a test of a lifelong brand of tires , a survey revealed that the mean life was 35,000 mikes and…

A: Let the random variable X be the life of tires.  The random variable X follows Normal distribution…

Q: A livestock company reports that the mean weight of a group of young steers is 1172pounds with…

A: a) It is given that the mean weight of a group of young steers follows normal distribution with mean…

Q: A desktop PC uses 120 watts of electricity per hour based on 4 hours of use per day. Assume the…

A: Given that mu = 120 , s.d = 6,n=500 p(x<106 ) =?  approximately how many will use less than 106…

Q: The results of a national survey showed that on average, adults sleep 6.9 hours per night.Suppose…

A: (a) The mean of the samples hours that adults sleep is 6.9 hours and standard deviation is 1.2…

Q: The mean score of a competency test is​ 82, with a standard deviation of 2. Between what two values…

A: Given that : Mean (u) = 82 S. D. (sgma ) = 2 Assume data set is nell shapped i.e  standard normal.

Q: average GPA of 2.78 with a standard deviation of 0.45.

A: Given that  GPA is normally distributed . A sample of university students has an average GPA of 2.78…

Q: A nutritionist claims that the mean tuna consumption by a person is 3.6 pounds per year. A sample…

A: Given that  Claim :  Mean tuna consumption by a person is 3.6 pounds per year Sample size (n) = 90…

Q: m and 5.50 m. What is the standard deviation

A: Introduction: The Standard Deviation in descriptive statistics is the degree of dispersion or…

Q: A nutritionist claims that the mean tuna consumption by a person is 3.5 pounds per year. A sample of…

A: (a) Let μ is defined as the population mean tuna consumption by a person. The claim of the test is…

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 researcher claims that the amounts of acetaminophen in a certain brand of cold tablets have a…

A: Hypothesis: Hypothesis is an assumption about the parameter of the population which will be made…

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.