Question
You want to obtain a sample to estimate a population mean. Based
on previous evidence, you believe the population standard
deviation is approximately o = 21.5. You would like to be 99%
confident that your estimate is within 10 of the true population
mean. How large of a sample size is required?
n =
View transcribed image text
Expand

Expert Answer

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Math
Statistics

Other

Related Statistics Q&A

Find answers to questions asked by students like you.

Q: (show solutions)

A: The measurement of 20 devices is given. Sample size = n = 20. Sample: 669, 712, 710, 722, 634, 743, ...

Q: Statistics Question

A: It is given that sample size n =10 and the probability of success (p) is 0.21.

Q: How to solve for a, b, c, and d?

A: The mean of a set of observations is the average. It is obtained by dividing the sum of data by the ...

Q: Climate change and CO2 2011 Data collected fromaround the globe show that the earth is getting warme...

A: The regression line is obtained as:

Q: a decade-old study found that the proportion, p, of high school seniors who believed that "getting r...

A: From the provided information, Population proportion (p) = 0.70 Sample size (n) = 215 Out of which 1...

Q: Suppose that a random sample of eighteen recently sold houses ina certain city has a mean sales pric...

A: Click to see the answer

Q: Assume researchers are trying to find out the mean concentration levels of a specific drug in a popu...

A: Given data: Sample size, n = 30 Sample mean concentration, x¯=6.7 mcg/ml Sample standard deviation, ...

Q: Seattle, Washington, averages m=34 inches of annual precipitation. Assuming that the distribution of...

A: From the provided information, Mean (µ) = 34 inches Standard deviation (σ) = 6.5 inches Let X be a r...

Q: Control limits for c chart if a standard value of c is not available: LCL =7 - 3Jē, CL =7, UCL =7 +3...

A: The control chart for non-nonconformities is called control chart for c-chart.

Q: 230 people are asked how many siblings they have? # of Siblings Frequency Relative Frequency Cumu...

A: Total people = 230 Relative frequency for 0 siblings = 0.1652 The required frequency for 0 siblings ...

Q: If the odds for a certain event are 25 to 27, what is the probability of the event occuring? Write y...

A: Odds against = P(against)/P(favor) total number of occurrences = 25+27 = 52 P(event occurring) = ?

Q: You are a crime scene investigator trying to match the lead content of bullet fragments found at a c...

A: Introduction: Denote μ1, μ2 as the true mean lead content measurements per fragment (grams/cm3) of b...

Q: Please very soon

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

Q: The widths of platinum samples manufactured at a factory are normally distributed, with a mean of 1....

A: Solution Given: Formula: Let "x" be the widths of platinum samples manufactured at a factory in "c...

Q: More cereal In Exercise 47 we poured a large and asmall bowl of cereal from a box. Suppose the amoun...

A: a. It is given that the mean amount of cereal which can be poured in a small bowl is 1.5 ounces and ...

Q: If A and B are independent, then

A:  

Q: P(x) 0.029 Five males with an X-linked genetic disorder have one child each. The random variable x i...

A: Solution Conditions for the discrete probability distribution The sum of all probability is equal to...

Q: For each of the following variables, tell me level of measurement and what statistic you would use t...

A: Introduction: Levels of measurement: Nominal: When the possible observations are tags or categories ...

Q: Interpreting z-scores: Complete the following statements using your knowledge about z-scores.a. If t...

A: Standardized z-score:   The standardized z-score represents the number of standard deviations the da...

Q: The personality variable extraversion is normally distributed in the population and has a mean of 10...

A: Click to see the answer

Q: 12) A instructor gives students a surprise quiz and records a mean grade of 12 points. What is the n...

A: Click to see the answer

Q: How many miles are there between two cities, if the distance is represented by a 2.4 inch line on a ...

A: Click to see the answer

Q: QUESTION 27 Glucose levels in patients free of diabetes are assumed to follow a normal distribu...

A: Given information- Population mean, μ = 120 Population standard deviation, σ = 16 Let X be the gluco...

Q: 32-please see attached

A: Solution: From the given information, N=53 home work scores and µ=73.

Q: The odds against the horse Bucksnot winning the race are 11:17. What is the probability that Bucksno...

A: Given, odds against the horse Bucksnot winning the race are 11:17 P(Bucksnot will win the race)=?  

Q: Faulty or not? You are in charge of shipping computersto customers. You learn that a faulty disk dri...

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

Q: A psychologist is studying smokers' self-images, which she measures by the self-image (SI) score fro...

A: The Null hypothesis H0: μ = 150. Alternative hypothesis H1: μ ≠150 Since sample size is small and po...

Q: With reference to Definition 4, show that μ0 = 1and that μ1 = 0 for any random variable for whichE(X...

A: The value of μ0 is calculated as follows: μ0= E(X-(E(x)))0      = E(1)      =1  

Q: what are some examples for a travel survey questions using number answers

A: Introduction: It is necessary to identify some questions that a researcher would ask on a travel sur...

Q: The following data represent the time between eruptions and the length of eruption for 9 randomly se...

A: Solution: From the given information, the coefficient of determination is 85.7%.

Q: Can you tell how old a lion is by looking at its nose? A professor at the University of Wisconsin-Ma...

A: Click to see the answer

Q: Plot X bar and S charts for the given data. is the process in control.   See attached photo

A: X-bar chart:   Ob. 1 Ob. 2 Ob. 3 Ob. 4 Ob. 5 Ob. 6 Ob. 7 Ob. 8 Ob. 9 Ob. 10 ...

Q: The Customer Care Department of Villa Supermarket Corp. recorded a high-time number of complaints fo...

A: (a)    

Q: The following are grade point averages measured in a sample of 8 undergraduate students who are appl...

A: Solution: Let X be the grade point average. The given data is 3.28, 2.97, 3.05, 3.61, 3.39, 2.95, 3 ...

Q: solve for j,k

A: The given frequency table is as follows:

Q: Statistics Question

A: Mean weight of Red Angus Cows: M = 1109 lbs Standard deviation of Red Angus Cows: SD = 31 lbs   Comp...

Q: The 99% confidence interval for mean is (12, 16). Then, find the values of sample mean and margin of...

A: Click to see the answer

Q: The number of unhealthy days based on the AQI (Air Quality Index) for a random sample of metropolita...

A: Given data is number of unhealthy days based on the AQI for a random sample of metropolitan areas . ...

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 3.4 years...

A: Given observation Mean = 3.4 Standard deviation = 0.9  

Q: Gallup At its website (www.gallup.com) the Gallup Pollpublishes results of a new survey each day. Sc...

A: The population of interest is all adults in the United States aged 18 and older. Therefore adults ha...

Q: Kara categorized her spending for this month into four categories: Rent, Food, Fun, and Other. The a...

A: From the provided information, Kara’s month spending = $333 + $417 + $500 +$250 = $1500 The amount s...

Q: Researchers recruited a sample group of older adults and a sample group of younger adults for a stud...

A: Given that , Researchers recruited a sample group of older adults and a sample group of younger adul...

Q: In a study of pain relievers, 100 people were given product A, and 71 experienced relief. In the sam...

A: Given that, 100 people given product A and 71 experienced relief. Also in same study 25 people given...

Q: C-e

A: Here's the explanation for part c , d and e are as follows; Here two variables are given to us named...

Q: The probability density function of a continuous random variable is given by 1 1 4 f (x) = - 4 for x...

A: Click to see the answer

Q: On an international​ exam, students are asked to respond to a variety of background questions. For t...

A: It is given that the correlation is 0.762.

Q: In California, we need more rain to sustain the health of our natural environment, argriculture, and...

A: Let x indicates the inches of rain and f indicates frequency.  

Q: According to the open Doors Report, 9.5% of all full-time u.S. undergraduate studentsstudy abroad ( ...

A: Click to see the answer

Q: A sample of 15, 10 years -old children was taken to study whether watching television reduces the am...

A: Click to see the answer

Q: If you flip a fair coin 9 times, what is the probability of each of the following Getting all tails...

A: Click to see the answer

Transcribed Image Text

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately o = 21.5. You would like to be 99% confident that your estimate is within 10 of the true population mean. How large of a sample size is required? n =