Recent report in Times showed a typical family of four spends $490 per month on food with a mean of $490 and a standard deviation of $30. a) What is the probability that a family of four spends exactly $430 per month on food? b) What is the probability that a family of four spends more than $430 per month on food? c) What is the probability that a family of four spends between $430 and $550 per month on food?

Q: The time needed to complete an exam in a college campus is normally distributed with a mean of 80…

A: Given DataMean = 80Standard Deviation = 10a)Probability of completing the exam in one hour or less

Q: A study indicates that 18- to 24-year olds spend a mean of 145 minutes watching video on their…

A: given data normal distributionμ = 145 minutesσ = 20 minutes

Q: Weights

A: Normal probability plot is one of the technique to assess whether the data follows normal…

Q: Automobile repair costs in Georgia continues to rise with an average cost now at $367 per repair…

A:

Q: hotel in a European city follows a normal distribution with a mean of 170 euros and a standard…

A:

Q: The patient recovery time from a particular surgical procedure is normally distributed with a mean…

A: Given that the mean of 5.9 days and the standard deviation of 1.8 days.

Q: 9. Total sales of cranes in a month is modeled as Normal with a mean of 12.6 and a standard…

A: We have to find probability for given data...

Q: Tiger Woods hits an average driver 287.2 yards with a standard deviation of 24.6 yards. What is the…

A: The probability value is calculate by means of standard normal variate with the random variable,…

Q: 199. If the average cost of a hospital stay is $4200 with a standard deviation of $1000, and…

A: Given Data : Population Mean,μ = 4200 Population Standard Deviation,σ = 1000

Q: A study of the time spent shopping in a supermarket for 20 specific items showed an approximately…

A: Provided information is, a study of the time spent shopping in a supermarket for 20 specific items…

Q: 3. The commute time for Cypress College students who drive from their home to the college follows a…

A: Let X be the random variable from normal distribution with mean (μ) = 26 and standard deviation (σ)…

Q: a. The probability that a pregnancy will last 308 days or longer is (Round to four decimal places as…

A:

Q: A study shows that the normal time that a customer occupied a table in a fine dine restaurant is 1.2…

A: Solution-: Given: μ=1.2,σ=0.4,n=25 We find, (a)  What is the value of the mean of the sample means?…

Q: Gestation length (in days) of a dog forms a normally distributed data set with mean 69.2 and…

A: Given that gestation length (in days) of a dog forms a normally distributed data set with mean 69.2…

Q: The mean of a normal probability distribution is 600; the standard deviation is 20. About 68% of…

A: given data normal distribution population mean  = 600 population sd = 20

Q: A waitress believes the distribution of her tips has a model that is slightly skewed to the left​,…

A: Given Information: The distribution of tips has a model that is slightly skewed to the left​, with a…

Q: 2. The average gas mileage of an Audi A5 Cabriolet car is 39.5 miles per gallon. If the gas mileages…

A: given information According to given question random variable (x = average gas mileage) follows…

Q: Gestation length (in days) of a dog forms a normally distributed data set with mean 66 and standard…

A:

Q: The annual per capita consumption of bottled water was 30.5 gallons. Assume that the per capita…

A: We have given that.   X~N( μ , ?^2 )   μ =30.5 , ? =13   Z-score =( x - μ )/?   NOTE:- According to…

Q: Gestation length (in days) of a dog forms a normally distributed data set with mean 58.7 and…

A: Given: X~N58.7,1.592   Also if, X~μ,σ2Z=X-μσ~N0,1

Q: . In order for an engineering graduate to enroll in a master’s program, the graduate studies…

A: GivenMean(μ)=420standard deviation(σ)=100

Q: 1) The time until recharge for a battery in a smartphone is normally distributed with a mean of 250…

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

Q: The time until recharge for a battery in a smartphone is normally distributed with a mean of 250…

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

Q: A study indicates that 18- to 24- year olds spend a mean of 120 minutes watching video on their…

A: The mean is 120 minutes and the standard deviation is 20 minutes.

Q: A physical fitness association is including the mile run in its secondary-school fitness test. The…

A: Let "X" be the time taken by a boy in secondary school to run a mile.

Q: A line waiting for tickets to an event has a normal distribution and the mean time is 23 minutes.…

A: Population mean, μ=23 Population sd, σ=4

Q: 42) The lengths of pregnancies are normally distributed with a mean of 270 days and a standard…

A: According to the given information in this questionWe need to answer two parts

Q: 3. In preparation for the Olympics, an alpine skier is practicing a particular course. The amount of…

A: Let X denote the time to complete a single run. Given that X follows N(mean = 100, SD = 2), then Z =…

Q: The scores on a test are normally distributed with an average (mean) of 72 and a standard deviation…

A: GIVEN DATA normal distributionμ = 72σ = 4

Q: Supposed the price of paid apps for a certain category is normally distributed with the mean of $3.5…

A: Given that the  price of paid apps for a certain category is normally distributed with, Mean = 3.5…

Q: 4. The systolic blood pressure reading for a person varies throughout the day. Assume that for a…

A: The normal distribution is used in statistics to calculate probabilities.

Q: .    The reading speed of sixth-grade students is approximately normal. With a mean speed of 125…

A: Let X denote the reading speed of sixth-grade students and it follows normal distribution with a…

Q: The average chef at a restaurant earns $17 an hour with a deviation of $1.75. What are the chances…

A:

Q: The annual per capita consumption of bottled water was 33.5 gallons. Assume that the per capita…

A: "Since you have posted a question with multiple subparts we will provide solutions only to the first…

Q: In a letter to an advice​ column, a wife claimed to have given birth 307 days after a brief visit…

A: The lengths of pregnancies are normally distributed with a mean of266 days and a standard deviation…

Q: me sources report that the weights of full-term newborn babies in a certain town have a mean of 7…

A: Given:  X = Weight of new born babies  X follows normal distribution with mean = 7 pounds and…

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.