A major credit card company has determined that the amount its customers charge on their accounts is normally distributed with an average of 2800 per month and a standard deviation of 200. What proportion of customers charge more than 2750 per month on their account round off to three decimals?  What percentage of customers charge between 2410 and 3016 per month rounded off to two decimals?

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

A: Given: Mean  μ=2800Standard deviation σ=200Total number of customers n=20,000          (normally…

Q: A drug was tested on one hundred and fifty patients of which thirty patients respond to the…

A: Given information: A drug was tested on 150 patients. Among 150 patients, 30 patients are responded…

Q: Heather, who turns eighty years old this year, has just learned about blood pressure prob and is…

A: The question is about Chebyshev's inequality.Introduction :Chebyshev's inequality theorem :At least…

Q: The weights of adult California Condors average 14.8lbs with a standard deviation of 3.25lbs.…

A:

Q: If the average weight for cats is 12 pounds and the standard deviation is 2 pounds. 95 percent of…

A: Given data:  average weight for cats = 12 pounds standard deviation = 2 pounds. To find: 95 % of all…

Q: uppose that pulse rates among healthy adults are normally distributed with a mean of 81 beatsminute…

A: Z = x - μσ~N(0,1)

Q: The weights of men in their 30s are normally distributed with a mean of 190 pounds and a standard…

A: From the provided information, Population mean (µ) = 190 pounds Population standard deviation (σ) =…

Q: Of the 200 American film enthusiasts, the average age is: 30 years, while the standard deviation is…

A: Normal distribution is generally denser in the center, and basically less denser at the tails. There…

Q: Isn't here the standard deviation equal to 4, not 2, as the tutor wrote?

A: Solution-: Given: μ=-3,σ=4 We want to find, P(0<X<2)=? Draw the picture.

Q: According to a survey, the average base salary for women in sales is higher than the average base…

A: From the provided information, The average base salary for women is $5800 per month. Therefore, the…

Q: If the main level of snowfall for Boston Massachusetts is 44 inches per year and the standard…

A:

Q: Suppose that the time required to complete a 1040R tax form is normally distributed with a mean of…

A:

Q: Assume that the amount of time a person experiences cold virus symptoms are normally distributed…

A: Given data Mean = 7.5 days  Standard deviation  = 1.5d days To find: What proportion of cold…

Q: The SAT scores (X) of the students in the U.S. in 2011 are normally distributed with a mean 1500 and…

A: The objective of this question is to find the percentage of students who scored below Darth Vader on…

Q: Assume that the basic unit of the society incomes are normally distributed with mean ₱30,000.00 and…

A: Given : Let X be a r.v of  the society incomes X~N(μ=30000.00 , σ2=10000.00)  If the poverty level…

Q: Based on a survey, the average monthly allowance of the students of Oxford University is ₱25,000…

A:

Q: on a national achievement test score was 850 with a standard deviation of 100. what proportion of…

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: In a recent study, the Centers for Disease Control and prevention reported that diastolic blood…

A: The problem provides us with the following values:Mean (μ) = 80.5 mmHgStandard Deviation (σ) = 9.9…

Q: Last year, the revenue for medical equipment companies had a mean of 7070 million dollars with a…

A: The objective of this question is to find the percentage of medical equipment companies with revenue…

Q: The body temperatures of a group of healthy adults have a normal distribution with a mean of 98.37…

A: It is given that the body temperatures of a group of healthy adults follow normal distribution with…

Q: Suppose that pulse rates among healthy adults are normally distributed with a mean of  79…

A: Given,mean(μ)=79standard deviation(σ)=10

Q: According to the records of an electric company serving the Boston area, the mean electric…

A: The mean and standard deviation are 1650 and 320, respectively.

Q: The U.S. Fish and Wildlife Service reported that the mean length of six-year-old rainbow trout in…

A: From the given information, let us define the random variable X as six-year-old rainbow trout in the…

Q: acher wishes to give A’s to the top 8% of the students and F’s to the bottom 8%. The next 10% will…

A: Given that  A teacher wishes to give  A’s to the top 8%  of the students F’s to the bottom 8% of the…

Q: A lightbulb is advertised as lasting 1000 hours with a standard deviation of 150 hours. Assume the…

A: It is given that the mean and standard deviation are 1,000 and 150, respectively.

Q: LED lamp has a mean usage of 750 hours with standard deviation of 50 hours. If LED lamp usage is…

A: Provided information is,  A LED lamp has a mean usage of 750 hours with standard deviation of 50…

Q: A particular fruit's weights are normally distributed, with a mean of 562 grams and a standard…

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

Q: According to the US Bureau of Labor Statistics, the average American consumer in 2018 spent $7,923…

A: mean = 7923 s = 1592 z-value = 1.282

Q: the average height on the soccer team is 66 inches with a standard deviation of 3. a z score of -1.6…

A: Introduction: Consider X as a normally distributed random variable, with mean μ and standard…

Q: Suppose that pulse rates among healthy adults are normally distributed with a mean of 79…

A: Based on the provided information, Mean=79 beats/minute Standard deviation=10 beats/minute

Q: the manager of a video store, you know that the number of sales of the hottest new movie releases is…

A: From the given information we find the solution.

Q: In what range would you expect to find the middle 95% of hate crimes per year? Between Incorrect and…

A: The random variable X is defined as the number of Hate Crimes in the United States which follows…

Q: The average age of senators in the 108th Congress was 62 years. If the standard deviation was 12.5…

A: Solution: Let X be the age of senator. From the given information,

Q: Suppose the mean length of songs played on a radio station is 190 seconds with a standard deviation…

A:

Q: The mean score on a standard test is 450 with a standard deviation of 78. What percent of the test…

A: From the given I formation, Mean score (µ) = 450 Standard deviation (σ) = 78 Thus, the required…

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.