A nurse is interested in the amount of time patients spend exercising per day. According to a recent study, the daily workout time per adult follows an approximately normal distribution with a mean of 94 minutes and a standard deviation of 27minutes. If the nurse randomly samples patients in her office to analyze their exercise time and gets a standard error of 3minutes, how many patients did she sample?

Q: A survey of nonprofit organizations showed that online fundraising has increased in the past year.…

A: Given that Sample size n = 50 Sample mean,M = 29 Sample SD, s = 7 The critical value of t at 90%…

Q: Suppose the platelet count of such patients with dengue fever follows a normal distribution with a…

A: Suppose the platelet count of such patients with dengue fever follows a normal distribution with a…

Q: A significant number of students completed a Statistics exam, and the final marks had a mean of 70…

A: Answer - A significant number of students completed a Statistics exam, and the final marks had a…

Q: At a computer manufacturing company, the actual size of computer chips is normally distributed with…

A:

Q: On their website, a property management company states that the mean monthly rent for apartments on…

A: Given,sample size(n)=21sample mean(x¯)=720standard deviation(s)=20α=0.05

Q: if heights of 3rd graders follow a normal distribution with a mean of 52 inches and a standard…

A:

Q: The total cholesterol levels of a sample of men aged 35-44 are normally distributed with a mean of…

A: Given:μ=219 and σ=36.6Sample size = n = 247We have to find how many would you expect to have a total…

Q: On their website, a property management company states that the mean monthly rent for apartments on…

A: The objective is to state null and alternative hypothesis and find the value of test statistic for…

Q: The number of minutes spent reading in one day is normally distributed with a mean of μ = 23 and a…

A: The normal distribution:A continuous random variable X is said to follow normal distribution if the…

Q: A boxer would like to know the mean diameter of a navel orange. If the standard deviation is 0.3…

A: Given Standard deviations=0.3 Margin of error=0.1 At 95% confidence z=1.96

Q: According to a recent survey, the population distribution of number of years of  education for…

A: What is the standard error of mean?

Q: A manager is interested in finding the average number of sales per day at a sporting goods store. If…

A: Obtain the sample size. The sample size is obtained below as follows: Use EXCEL Procedure for…

Q: A set of test papers is normally distributed with a standard deviation of 5. If Riley scored an 83…

A:

Q: In a certain city, the average 20- to 29-year old man is 69.8 inches tall, with a standard deviation…

A:

Q: A random sample of 26 psychology graduates scored an average of 458 on the GRE advanced psychology…

A: From the provided information, Sample size (n) = 26 Sample mean (x̅) = 458 Sample standard deviation…

Q: In an agricultural study, the average amount of corn yield is normally distributed with a mean of…

A: Given :- In an agricultural study, the average amount of corn yield is normally distributed with a…

Q: A quality control company was hired to study the length of meter sticks produced by a certain…

A: The mean length would be at the 92nd percentile is obtained below: here, P (Z < z) = 92% P (Z…

Q: In a recent study of 35 Grade5 students, the mean number of hours per week that they played video…

A: We know that,  Sample size (n) = 35, sample mean (x̄) = 16.6 and population standard deviation (σ) =…

Q: In 2019, the amount of money that motorists spent on gas had a normal distribution with a mean of…

A: Given Information Number of persons sampled (n) = 2400 Mean (µ) = 900 Standard deviation(σ) = 100…

Q: If the mean exam score of a class was 75%, with a standard deviation of 15%,what percent of students…

A: Given,mean(μ)=0.75standard deviation(σ)=0.15

Q: In a recent poll, the Gallup organization found that 45% of adult Americans believe that the overall…

A: Binomial distribution:A random variable Y denoting the number of successes in n trials for…

Q: In a certain city, the average 20- to 29-year old man is 69.4 inches tall, with a standard deviation…

A: Given information: Man Woman xM=75 inches.μM=69.4 inches.σM=3.0 inches. xW=70 inches.μW=64.5…

Q: The credit card balances on 1,000 accounts at the Jefferson Valley Bank have a mean of $760 and a…

A: mean = 760 s = 120 n = 1000

Q: A livestock company reports that the mean weight of a group of young steers is 1142 pounds with a…

A: Let X be a random variable such that X: Weight of a young steer X~N1142, 792 a) The probability of…

Q: As the size of a sample increases, the standard deviation of the distribution of sample means…

A: Here  Standard deviation of sample mean = σn

Q: The results of a recent survey indicate that the average new car costs $23,000, with a standard…

A: It is given that the mean new car cost is $23,000 with a standard deviation of $3,500.

Q: The golf scores for a school team were normally distributed with a mean of 68 and a standard…

A: Let X be the golf scores. It is given that X is normally distributed with mean 68 and standard…

Q: A recent study of 1,215 randomly selected middle school students revealed that the average number of…

A: From the provided information, Mean (µ) = 180 minutes Standard deviation (σ) = 45 minutes X~N (180,…

Q: An instructor in a large lecture class found, at the end of the semester, that the total point…

A: The provided information is:

Q: In a certain city, the average 20- to 29-year old man is 69.4 inches tall, with a standard deviation…

A: Given: For Man:      Avg = 69.4      SD = 3.2 For Women:       Avg = 64.3        SD = 3.9 Who is…

Q: The students of a large university in Luzon were studied regarding their hours of sleep at night.…

A: As the distribution of the hours of sleep can be modeled as normal distribution with mean μ of 6.9…

Q: In a certain city, the average 20- to 29-year old man is 69.8 inches tall, with a standard deviation…

A: Mean (man)=69.8Standard deviation (man)=3.0Mean (woman)=64.1Standard deviation (woman)=3.9

Q: At Pacific Freight Lines, bonuses are given to billing clerks when they complete 300 or more freight…

A: Given information Mean µ = 270 Standard deviation σ = 16 proportion of the time should a randomly…

Q: A small centre has found that the number of jobs submitted per day to its computers has a…

A: The empirical rule for variables is as follows: 68% of all possible observations lie within one…

Q: In a certain city, the average 20- to 29-year old man is 69.4 inches tall, with a standard deviation…

A: Solution-: Given: For Man: For Women: We find who is relatively taller, a 75 inch man or 70 inch…

Q: A highway study of 8000 vehicles that passed by a checkpoint found that their speeds were normally…

A:

Q: A popular soft drink is sold in 1-liter (1,000-milliliter) bottles. Because of variation in the…

A: A continuous random variable X is said to follow Normal distribution with parameters μ and σ2 if…

Q: In a certain​ city, the average​ 20- to​ 29-year old man is 72.5 inches​ tall, with a standard…

A: z- score for a 75-inch man =  0.833 z- score for a​ 70-inch woman = 1.447

Q: According to the College Board, scores on the math section of the SAT Reasoning college entrance…

A: Given information, Mean =516 Standard deviation =116

Q: The hotel room rate in Miami, Florida is normally distributed with a mean of $286 per night. Assume…

A:

Q: In a certain​ city, the average​ 20- to​ 29-year old man is 72.5 inches​ tall, with a standard…

A: 72.5 3.1 75 64.3 3.8 70

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: In a population of 100 male fruit flies, the mean abdomen length is 2.0 mm and the standard…

A: Given μ=2 and σ=0.3     Use standardization asz=x-μσ

Q: A recent report indicates that 2-year-old children from the well-educated suburban families watched…

A: From the provided information, Mean (µ) = 60 minutes Standard deviation (σ) = 25 minutes Let X be a…

Q: An analyst found that the average amount of money in bank accounts at his/her bank is $2,000 with a…

A:

Q: In a certain university, the students were informed that they need a grade in the top 8% of the…

A:

Q: Jessica, the owner of a medium-scale native handicrafts shop, knows from experience that the time…

A:

Q: In a certain​ city, the average​ 20- to​ 29-year old man is 72.5 inches​ tall, with a standard…

A:

Q: A recent newspaper article reported the results of a survey of well-educated suburban parents. The…

A: Given that 2-year-old children watching an average of 60 minutes of television each day watching an…

Q: On their website, a property management company states that the mean monthly rent for apartments on…

A:

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.