Estimate with 92% confidence the mean number of rounds played per year by physicians, assuming that the population is normally distributed with a standard deviation of 8.

Q: A random sample of 14 nurses in a large hospital showed that they worked on average 44.8 hours per…

A: The random variable time follows normal distribution. The sample size is 14. The sample mean is…

Q: Assume that the scores of a college entry exam are normally distributed with a mean of 400 and a…

A: Given,mean(μ)=400standard deviation(σ)=60

Q: UPPOSE THE LIFETIMES OF TV TUBES ARE NORMALLY DISTRIBUTED WITH A STANDARD DEVIATION OF 1.1 YEARS.…

A: GIVEN DATA : lifetimes of TV tubes are normally distributed with a standard deviation of 1.1 years…

Q: Scores on a Literature test have an average of 80 with a standard deviation of 6. What is the…

A: Solution: Let X be the score on a Literature test. From given information, X has mean µ=80 and a…

Q: The distribution of grades in a final exam conforms to the normal distribution with an average of 60…

A:

Q: According to a poll, a shopper spends an average of 45 minutes at the supermarket for each trip,…

A: Given : Mean , μ = 45Standard deviation, σ = 12 The variable x represents the duration of time spent…

Q: d) 85% of all students finish the activity in less than secon Submit Question

A: X~N( μ = 38.6 , ? = 6.3 ) μ = 38.6 , ? = 6.3 Z-score =( x - μ )/?

Q: Waiting times for customers in an airline reservation system are (in seconds) 953, 955, 948, 951,…

A: Data953955948951957949954950959

Q: Fluorescent lightbulbs have lifetimes that follow a normal distribution, with an average life of…

A: Solution: From the given information, σ=1,612 hours and n=332.

Q: Glucose levels in patients free of diabetes are assumed to follow a normal distribution with a mean…

A: Given , Mean ( μ ) = 111 standard deviation (σ)  = 10.

Q: A normal distribution has a mean of 76 and a standard deviation of Determine the z-score for the…

A: Solution

Q: The battery of cellphones tend to work less efficiently the longer you have your phone and…

A:

Q: Resting pulse rates for healthy adults are found to have approximately a Normal distribution with a…

A:

Q: Glucose levels in patients free of diabetes are assumed to follow a normal distribution with a mean…

A:

Q: A random sample of 14 registered nurses in a large hospital showed that they worked on average 43.9…

A: The sample mean is 43.9 and the standard deviation is 2.2.

Q: normal distribution has a mean of 80 and a standard deviation of 14. Determine the value above which…

A: Given that  X~N(μ= 80 , σ= 14 ) μ= 80 , σ= 14 Formula for Z-score Z=(X-μ)/σ

Q: Two types of feed have been developed for a freshwater fish raised in fish farms. 40 of the fish fed…

A: The following information is provided in the question Average weight of fish fed on first feed = 175…

Q: Body temperatures of adults are normally distributed with a mean of 98.60 Fahrenheit and a standard…

A: The Z-value of a random variable X is defined as follows: Here, the mean and standard deviation of…

Q: Assume the random variable X is normally distributed with a mean of 50 and a standard deviation of…

A:

Q: The line width for semiconductor manufacturing is assumed to be normally distributed with a mean of…

A: Given Data Population Mean,μ = 0.45 Population Standard Deviation,σ = 0.05

Q: Pulse rates of women have a normal distribution with a mean 75 and a standard deviation of 8. What…

A: Let "X" be the pulse rates of women.

Q: Q scores based on the Wechsler Adult Intelligence Scale (WAIS) are assumed to be normally…

A: Given data,Mean μ=100standard deviation σ=15Score is x=125z-score=?

Q: Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard…

A: Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard…

Q: College students average 8.4 hours of sleep per night with a standard deviation of 35 minutes. If…

A:

Q: Draw the normal curve. Suppose that the amount of time it takes the Bureau of Internal Revenue…

A: Solution-: Given: μ=14,σ=1.5 We want to find x such that, P[X<x]=0.45

Q: · For 500 readers polled, how many people read in between 18 and 22 minutes a day? . For 25,000…

A:

Q: Scores in a particular Mathematics test are normally distributed with mean of 175 and standard…

A: Scores in a particular Mathematics test are normally distributed with mean of 175 and standard…

Q: The distribution of grades in a final exam conforms to the normal distribution with an average of 60…

A: Given information: μ=60σ=8 The proportion of students required to pass=300350=0.857142857≈0.8571

Q: Yearly snow fall of a certain town follows a normal distribution with a mean of 37 inches and a…

A: Solution: Let X be the snow fall of a certain town. From given information, X follows normal…

Q: According to a poll, a shopper spends an average of 45 minutes at the supermarket for each trip,…

A:

Q: The weights of 40 watermelons coming out of a farm are normally distributed with a mean of 6 Kg and…

A: From the given information, Sample size (n) = 40 Ex=6,σx⏞ =1.945 Thus,

Q: The length of time it takes to find a parking space at the local grocery store, follows a normal…

A: See the handwritten solution

Q: Assume the average amount of caffeine consumed daily by adults is normally distributed with a mean…

A: The detailed solution is as follows below:

Q: estimate the difference in the amount of daily leisure time in hours of adults who have children…

A: State the given values. State the Null and Alternate Hypothesis.

Q: A random variable is normally distributed with mean 84.2 and standard deviation 17.5. What value is…

A: Solution: Let X be the random variable. From the given information, X follows normal distribution…