Coffee: The National Coffee Association reported that 61 % of U.S. adults drink coffee daily. A random sample of 275 U.S. adults is selected. (a) Find the mean H^. (b) Find the standard deviation o^. (c) Find the probability that more than 62 % of the sampled adults drink coffee daily. (d) Find the probability that the proportion of the sampled adults who drink coffee daily is between 0.57 and 0.63. (e) Find the probability that less than 67 % of sampled adults drink coffee daily. (f) Would it be unusual if less than 58 % of the sampled adults drink coffee daily?

Q: The average yearly Medicare Hospital Insurance benefit per person was $4064 in a recent year. If the…

A: The probability that it is less than 3800 when 20 patients chosen at random is obtained below: From…

Q: ectrical firm manufactures the light bulbs that have the length of life that is normally distributed…

A: Given: μ=3.0, σ=0.5 The corresponding z-value needed to be computed:

Q: The length of human pregnancies from conception to birth approximates a normal distribution with a…

A:

Q: Question 32 Problem in photo!

A: Computation of proportion of women have total serum cholesterol levels exceeding 200:Here, the mean…

Q: The mean score on a stress test is 5 and the standard deviation is 2. The distribution is normal.…

A: The distribution is normal with mean score on a stress test 5 and the standard deviation 2. Let X is…

Q: The average amount of sleep students get a night is normally distributed with a mean of 6.5 hours…

A: Normal distribution is also known as the Gaussian distribution . It is widely used in statistics .

Q: The average amount of sleep students get a night is normally distributed with a mean of 6.5 hours…

A: The average amount of sleep students get a night is normally distributed, Mean = 6.5 Standard…

Q: The applicants to a company took a 60-item entrance exam. Their scores resemble a normal…

A: Given that  X~N(μ= 50 , σ= 4 ) μ= 50 , σ= 4 Formula for Z-score Z=(X-μ)/σ

Q: In a recent study the LSAT total scores were normally distributed with a mean of 1120 and a…

A: Given information- We have given that LSAT total scores were randomly distributed. Population mean,…

Q: The average time in years to get an undergraduate degree in Mechanical engineer was compared for men…

A: Let, x1=3,x2=3.5,σ1=0.5,σ2=1,n1=n2=40

Q: The mean age that cats get adopted at a shelter is 21.4 months with a standard deviation of 3.6…

A: Normal distribution is also known as the Gaussian distribution . It is widely used in statistics .

Q: How do I find the P value when I am given A random survey of 75 death row inmates revealed that the…

A: State the hypotheses That is, the population mean time on death row could likely to be 15 years.…

Q: Empirical evidence shows that the "normal" resting adult body temperature is normally distributed…

A: Introduction:Let X be the normal resting adult body temperature. The mean normal resting adult body…

Q: The mean score in the 100 metres discipline of the decathlon is 912 points and the standard…

A:

Q: A recording firm wants the distribution of lengths of cuts on its playlists to have an average of…

A: The standard normal distribution is the continuous random variable that is derived from the normal…

Q: A highly selective boarding school will only admit students who place at least 1.5 standard…

A: Given data,Mean μ=300sd    σ=24z-score is z=1.5Minimum score (x)=?

Q: The amount of money spent on online foods by customers at an online restaurant follows a normal…

A:

Q: Loretta, who turns eighty this year, has just learned about blood pressure problems in the elderly…

A: Chebyshev’s inequality: Chebyshev’s rule is appropriate for any distribution. That is, Chebyshev’s…

Q: The distribution of scores for the final exam in MATH . ast year had a Normal distribution with a…

A: Here, mean is 74 and the standard deviation is 14. The sample size, n is 49.

Q: The exam scores on a statistics final exam are normally distributed with a mean of 140 points out of…

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

Q: annual precipitation amounts in a certain mountain range are normally distributed with a mean of 82…

A: Given,sample size(n)=25mean(μ)=82standard deviation(σ)=9

Q: The score on standardized test are normally distributed with a mean of 115 and standard deviation of…

A: Let X denote the score on standardized test and it follows normal distribution with a mean of 115…

Q: A highly selective boarding school will only admit students who place at least 1.5 standard…

A:

Q: average playing time of mp3 songs is 35 minutes with standard deviation of 5 minutes. If the…

A: As per company guidelines I solved only First questions.thank you

Q: The lengths of pregnancies are normally distributed with a mean of 268 days and a standard of…

A: Given that, μ=268,σ=15,n=81   (1) The probability that they have a mean pregnancy less than 265 days…

Q: The mean measure of high density lipoprotein (HDL), or good cholesterol, is 54 with a standard…

A: From the information, the mean is 54 and the standard deviation is 17. The probability of getting a…

Q: The housing market has recovered slowly from the economic crisis of 2008.​ Recently, in one large​…

A: We have given that.  Mean = 9355. Sample size (n) = 39. Standard deviation = 1583. Favarable case…

Q: The mean weight of a sample of chocolate bars from a particular chocolate factory is 8 ounces with a…

A: Let X represent the random variable   Mean=8 SD=0.1   X~ Normal (8, 0.12)

Q: The average score of 300 students taking a statistics final was 72 with a standard deviation of 5.…

A: We have to find probability..

Q: According to the U.S. Department of Agriculture, the amount of soft drinks consumed by people in the…

A: Given, Mean = 53 Standard deviation = 17.1   Sample size = 25   The objective to is find the…

Q: Suppose the scores of students on an exam are normally distributed with a mean of 558 and a standard…

A:

Q: Scores on the SAT test have a mean of 1518 and a standard deviation of 325. If 100 students are…

A: Scores on the SAT test have a mean of 1518 and a standard deviation of 325.

Q: The weight of a type of dog follows Normal distribution with mean of 10 pounds and standard…

A: It is given that the weight of dog is normally distributed with mean 10 pounds and standard…

Q: The tread life of a particular brand of tire is a random variable best described by a normal…

A:

Q: The life expectancy of a fluorescent tube is normally distributed with a mean of 6,050 hours and a…

A: Given that, The life expectancy of a fluorescent tube is normally distributed with a mean of 6,050…

Q: The average time in years to get an undergraduate degree in Mechanical engineer was compared for men…

A:

Q: The distribution of scores for the final exam in Math class last year had a Normal distribution with…

A: Given: Mean, μ=74 Standard deviation, σ=14 Sample size, n=49 To find: P (X<77)

Q: The migratory habits of zebra in the savanna are normally distributed with a mean of 238 days and a…

A: From the provided information, Mean (µ) = 238 days Standard deviation (σ) = 13 days

Q: Females have pulse rates that are normally distributed with a mean of 74 beats per minute and a…

A: We have to find out given probability..

Q: The mean performance score on a physical fitness test for Division I student-athletes is 947 with a…

A: A normal distribution is a continuous distribution which has many real life applications. A standard…

Q: distribution with mean of 40 and standard deviation of 8 is transformed into z-score. Describe the…

A: The z score distribution is also known as a standard normal distribution. In the standardized form,…

Q: Valve stem made by an automatic machine have lengths which are normally distributed with a mean of…

A:

Q: The tread life of a particular brand of tire is a random variable best describe by a normal…

A:

Q: the mean monthly salary for a flight attendant is about 65700 with standard deviation of 14500. A…

A: GivenMean(μ)=65700standard deviation(σ)=14500sample size(n)=48

Q: probability that a patient recovers from a rare blood disease is 0.4. If 15 people are known to have…

A: Given problem is binomial distribution Let, X: Patient recovers from a rare blood disease p=Prob. of…

Q: The average score of all golfers for a particular course has a mean of 66 and a standard deviation…

A: Given: n= 64 The standard error can be calculated as: σX=σn=464=0.5 The z score for x = 67 can be…

Q: A normal distribution is observed from the times to complete an obstacle course. The mean is 69…

A: Mean = 69 Standard deviation = 6

Q: College students average 8.2 hours of sleep per night with a standard deviation of 45 minutes. If…

A: Given Data Population Mean,μ = 8.2 Population Standard Deviation,σ = 45.0

Q: College students average 7.1 hours of sleep per night with a standard deviation of 35 minutes. If…

A:

Q: A highly selective boarding school will only admit students who place at least 1.5 standard…

A:

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.