A researcher wishes to estimate the average number of minutes per day a person spends on the Internet. How large a sample size must she select if she wishes to be 99% confident that the population mean is within 13 minutes of the sample mean. Assume the population standard deviation is 41 minutes round your answer to the next whole number

Q: Describe the properties of range, mean deviation, and standard deviation.

A: Properties of range:- 1.) The value of range is always non-negative. (either positive or equal to…

Q: You throw a ball as far as you can 5 times, recording the distance for each throw: 165 feet, 184…

A: since only 5 observation is given we will consider them as sample (n = 5)and population (N = 100)…

Q: weight of 10 persons needs to be greater than 190.29 xceed the weight of the elevator. (d) What is…

A: It is given that  Mean, μ = 155 Standard deviation, σ = 29 Sample size, n = 16 Weight limit = 2500

Q: If a population has a mean of 25, what is the mean of the sampling distribution of its mean. Please…

A: Given,population mean(μ)=25

Q: The number of hours per week that the television is turned on is determined for each family in a…

A: Given dataThe number of hours per week that the television is turned on is determined for each…

Q: The Final exam average for an Biology class is normally distributed with a mean of 58% and a…

A: From the provided information, Population size (N) = 2051 students Mean (µ) = 58% Standard deviation…

Q: Need asap   For a medical study, a researcher wishes to select people in the middle 75% of the…

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Q: The population mean is 75 and the population standard deviation = 6. Random samples (containing 16…

A: Given , The population mean ( n )   = 75 ,  the population standard deviation ( σ )= 6

Q: Find the standard deviation for the population data set. You must clearly show your work with…

A: Given data 2, 5, 9, 11, 13 Mean,  x = ∑i xin= 2+5+9+11+135 = 8 xi (xi-x¯) (xi-x¯)2 2 -6 36 5…

Q: Read each problem carefully. Show your complete solution and present an illustration for each…

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

Q: Will you provide an example of Standard Deviation math problem and solution?

A: Standard deviation:The standard deviation indicates by how much each observation differs from a…

Q: It takes an average of 12.1 minutes for blood to begin clotting after an injury. An EMT wants to see…

A: The random variable is time to blood clotting.We have to test whether the population mean time for…

Q: Find the indicated iq score and round to the nearest whole number. The graphs depict iq scores of…

A: The mean The standard deviation The graph is left-tailed and provides the area to the left of an IQ…

Q: mean and standard deviation change?

A: Mean is the average value of the given dataset. It is based on all observation. Standard Deviation…

Q: how did you find the standard deviation to be 1.2. explain clearly?

A: Here we have to explain the how we get standard deviation is 1.2

Q: Scenario 2: The breaking strength of cables produced by a manufacturer have a mean of 1800 lb and a…

A: Claim : the breaking strength can be increased.

Q: Write a sentence in your lab report explaining the effect that adding the two new data points had on…

A: From the given information,Original data points = {60,31,50,48,50,54,56,62,53}New additional points…

Q: It takes an average of 8.7 minutes for blood to begin clotting after an injury. An EMT wants to see…

A:

Q: the data set has a size 50, how many observations lie within 2 standard deviations of the mean

A: From the provided information, Sample size (n) = 50 The observations lie within 2 standard…

Q: Part 1 of 4 Victoria, an accomplished marathon runner, claims that the standard deviation for her…

A: Given: n=11 The samples are: 227.2, 233.3, 259.7, 265.8, 252.1, 228.8, 222.6, 202.9, 214.5, 237.2,…

Q: Each year students in a local school district write a national examination. The average on this…

A: Average of a dataset is the mean value of the observations in the data and it is computed by…

Q: William revealed that he makes 1,000,000 dollars annually. The average annual income in the country…

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Q: A particular fruit's weights are normally distributed, with a mean of 625 grams and a standard…

A:

Q: We are asked to find the values that separate the middle 60% of the population from the top and…

A: In a normal distribution, the z-score is a measure of how many standard deviations an element is…

Q: A particular fruit's weights are normally distributed, with a mean of 727 grams and a standard…

A: The mean is 727 and the standard deviation is 34 grams.

Q: The last student surveyed was active for 25 minutes. What percent of students were more active than…

A: It is given that Min = 4, Median = 25 and maximum = 86

Q: A recent study indicated that 43% of the 100 women over age 55 in the study were widows. Round up…

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Q: which in the picture is an estimator for the population mean µ?

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Q: Imagine you select 30 males at random and find their mean height to be 5 ft 11 in. tall with a…

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Q: The highway mileages of 147 cars are in a file named CARS2.+ These cars are 2003 models. Find the…

A: Mean Formula The mean formula is defined as the sum of the observations divided by the total number…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 268 days…

A: 1. Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: Americans (on average) individually eat 16 pounds of seafood each year with a standard deviation of…

A: Given that   x̄ = 14 , μ = 16 , ? = 7 , n = 4

Q: How would you find the standard deviation by hand, of the following numbers: 1,1,3,01,6,2

A: Standard deviation:Standard deviation quantifies the dispersion of a data set from its mean. The…

Q: The middle 95% of a group of 1000 students got scores ranging from 50 to 90 on a math test. If the…

A: Normal Distribution: Understand the properties of the normal distribution, including the mean (μ)…

Q: Roll a pair of die 36 times, and draw a bar graph of all the outcomes. Using the data, find the…

A: In question,  Given that a pair of dice is rolled 36 times. Then we'll find mean Variance and…

Q: Task: Consider a population consisting of the following data: 3, 5, 7, 9. 1. Solve for the…

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Q: Report anything you noticed about the way the graphs were shaped, how they were different as the…

A: Considering the Reese’s Pieces candies manufactured by Hershey are 25 candies: Physical Sample:…

Q: A large normally distributed data set has a mean of 10 and a standard deviation of 1.5.…

A:

Q: A particular fruit's weights are normally distributed with a mean of 598 grams and a standard…

A: Given  mean= 598, standard deviations=34, n=4

Q: A quantitative data set has a size of 50. At least how many observations lie within seven standard…

A: Suppose X is a random variable with expectation, μ and standard deviation, σ. Then, for any positive…

Q: Which graph represents P81? Choose the correct graph below. O A. O B. The temperature for P81 is…

A: Let Z denote the readings on the thermometre. Given that Z follows N(0,1)

Q: A population is normally distributed with a mean of 20.  What is the population standard deviation…

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.