4. The time taken to boil a kettle is normally distributed with a mean of 94 seconds and a standard deviation of 6. What times do the middle 30% of boils

Q: 1. If the heights of 300 students are normally distributed with mean 68.0 inch and standard…

A:

Q: 1) Which sample will have the larger mean number of books read? 2) Which sample will have the larger…

A: The given histogram is:

Q: Would a person spending $476 on their car be considered usual or unusual if the amount spent by the…

A: Given information- Population mean µ = $347 Population standard deviation, σ = $39.58 Let, X be the…

Q: If the average American male is 5'10" and the standard deviation is 3", then LaBron James who is…

A:

Q: 4. Consider that in a population of Filipino adults ages 18 to 65, Body Mass Index (BMI) is normally…

A: Given: X~N(μ,σ)μ=28σ=6

Q: Consider a sample with a mean of 500 and a standard deviation of 100. What are the z-scores for the…

A: The mean is 500 and the standard deviation is 100.

Q: 3. Suppose the mean blood glucose of a population of adults is 162 with a standard deviation σ=58.…

A: Given that, n=36,μ=162σ=58 The mean and standard deviation of sample mean is,

Q: An entrance examination is to be conducted to 1600 ncoming freshmen students at Gordon college which…

A: Let X be the variable denoting score of the exmination. X ~ N (μ, σ) Given mean, μ = 85 standard…

Q: 8. The length of an elephant's trunk is normally distributed with a mean of 175 cm and a standard…

A: Given, We need to find 10th Percentile P10

Q: Assuming that the heights of college women are normally distributed with mean 62 inches and standard…

A:

Q: 4.) Determine the range and Standard Deviation of the set of data 4, 8, 9, 11, 13, 15

A:

Q: 4. The Fresha Tea Company pack tea in bags marked as 250 g. A large number of packs of tea were…

A: Let X denotes the weight of tea in a pack. We are given    μx=255  &  σx= 2.5 A pack will be…

Q: What is the standard deviation of the data set 14,23,9,12,21,18,8

A:

Q: A group of 123 bunnies had a mean hopping distance of 48 inches and a standard deviation of 3.5…

A: To find the number of: a) Bunnies will hop between 41 and 44.5 inches b) Bunnies will hop between 48…

Q: a. If PO1 Dela Cruz's waist girth is 32, how many standard deviations away is he from the mean? b.…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: 1. The Prior to medical visits, patients are asked to complete a self-administered medical history…

A:

Q: The number of hours worked per week for a sample of ten students is shown below. Student Hours 1 2…

A: Note- As per our policy we can answer the first 3 sub-parts of a question.   Given information- The…

Q: 7) Calculate the vari ence and the standard deviation for the following data 3. 4 Number of children…

A: Given that : A frequency table is here By using this information we calc5 relative frequency and…

Q: 3. The amount dispensed by the coffee machine follow the normal distribution with a mean of 5,286…

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Q: 2. Calculate the frequency mean, the frequency standard deviation, the median and the first and…

A: Given a grouped data set And said to calculate its frequency mean, frequency standard…

Q: what is the mean and standard deviation of the following sample:  10, 1, 2, 5, 9, 7, 2, 4

A: Mean and standard deviation of the sample:Mean is the measure of central value of the data set and…

Q: what is the mean and standard deviation of the following sample:  8, 1, 5, 1, 5

A: From the given information, X= {8, 1, 5, 1, 5}Mean and standard deviation of the sample can be…

Q: 4.The lengths of trout in a certain lake are normally distributed with a mean of 7 inches and a…

A: For Normally distributed data, mean and standard deviation have given. Minimum size of sample…

Q: 9) In a class of 30 students, how many students failed the test (below 64), if the mean grade on a…

A:

Q: 4. In studying ocean conditions, the Bureau of Fisheries found that for one location, the August…

A: Given ,Mean μ = 83.6Standard deviation σ=24Let  x be temperature normally distributed

Q: 3. Find the mean, median, mode, and Standard deviation of the following data: 15, 11, 18, 9, 15, 18,…

A: The mean can be calculated as follows:

Q: 7. The height of rugby players is normally distributed with a mean of 1.86 m and a standard…

A: Given: Population mean μ=1.86 Population standard deviation σ=0.08 Middle 80% so, α=1-0.80=0.20

Q: Suppose a population has three values 13, 17 and 24. What is the standard deviation of the sampling…

A: Given, Population values are 13, 17 and 24. Samples are drawn without replacement.

Q: Consider a sample with a mean of 500 and a standard deviation of 100. What are the z-scores for the…

A: Consider that the sample mean and standard deviation of a random variable x are x̄ and s,…

Q: 4. Assume that the test scores from a college admission test are normally distributed with a mean of…

A: Given  μ= Mean of test score from a college admission test = 450 σ= Standard deviation of test score…

Q: 2. In a departmental examination on statistics, the mean grade was 64 and the standard deviation was…

A: Determine the number of students took the examinations.   The number of students took the…

Q: If the standard error,  of a sample data set is 5 and the standard deviation,  of the distribution…

A: For a population with mean µ  and standard deviation σ, the standard error is σx̅ = σ/√n, where x̅…

Q: 4. The lengths of trout in a certain lake are normally distributed with a mean of 7 inches and a…

A:

Q: 4.15. If the local restaurants in a small town record an average of 92 customers a day, with a…

A:

Q: 4. On a standardized test, scores are normally distributed with a mean of 400 and a standard…

A: GivenMean(μ)=400standard deviation(σ)=80

Q: (25) The distribution of average speeds of the top 53 drivers in NASCAR is roughly symmetric,…

A: (a) Draw the normal curve with the values from Z=–3 to Z=3

Q: 4) Which of these samples would have the smallest standard deviation? a. 101, 92, 84, 131 b. -25,…

A:

Q: 5. The quality control manager at a light bulb factory needs to estimate the mean life of a large…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Calculate the standard deviation for the data set below 1, 3, 4. 5, 6, 9, 12, 16

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: 4. What is the range of data values that would allow 99% of the fall within the mean? 5. Why does…

A: “Since you have mentioned the question number 4 and 5, we will solve that question for you. If you…

Q: 7. A set of data has a variance of 81. What is the standard deviation?

A:

Q: 1. There are 95% of students at school weigh between 62 kg and 90 kg at Westchester Community…

A: 95% of the data lies between X¯-1.96×σ and X¯+1.96×σ hence we get, X¯-1.96×σ = 62 X¯+1.96×σ = 90…

Q: As reported in Runner's World magazine, the times of the finishers in the New York City 10- km run…

A: Percentile : Percentile is the number such that certain percentage of the fall below that values.…

Q: 4. The lowest and the highest data value of a data set are 12 and 28 respectively, then the…

A:

Q: 4. Find the mean and the standard deviation of the following data set: 12, 15, 12, 19, 21, 11, 13,…

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Q: The standard deviation of the sample 10, 10, 10, 10, 10  is

A:

Q: one region, the September energy consumption levels for single-family homes are found to be normally…

A: The z-score for the area of 0.45 using standard normal table is –0.13.

Q: 3. In the qualifying examination for the admittance to college, the mean score was 65 and the…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: In a distribution with a mean of 80 and a standard deviation of 8, what percentage of number would…

A: a. The mean is 80, and standard deviation is 8. The percentage of number would be less than 64 or…

Q: Suppose that the amount of time that takes place for the Bureau of Internal Revenue to send refunds…

A: Solution: 4. Let X be the amount of time. From the given information, X follows normal distribution…

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.