Answered: If 32 students from the sample use…

If 32 students from the sample use Samsung smartphone and the accuracy level will be within + 3%. At 95% confidence level, determine the sample size n

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Q: A doctor would like to estimate the mean difference in height of pairs of identical twins. The…

A: The correct inference regarding the given interval of (-0.823, 0.573) is to be made from the given…

Q: Suppose we know that a confidence interval is (-.735, .125). Find the sample mean and the error…

A: Ans- Given, a confidence interval is (-.735, .125). Find the sample mean and the error bound.

Q: Suppose we know that a confidence interval is (27,35), with a margin of error of 4. Find the sample…

Q: A random survey of 70 male sophomores showed 16 preferred off campus living and out of 63 female…

Q: A doctor wants to estimate the mean HDL cholesterol of all 20-29 year old females. How many subjects…

A: formula for the sample size needed to estimate a population mean is

Q: We randomly sample 300 people in a specific town. 96 of them like cats. Based on this, construct a…

A: The provided information are: Sample size=n=300 Number of favroable cases==x=96 to Construct the 95%…

Q: I want to estimate the average time it takes a tomato plant to bear fruit. I randomly sample 16…

A: Given,sample size(n)=16mean(x¯)=36standard deviation(σ)=17α=1-0.85=0.15α2=0.075Z0.075=1.4395…

Q: am interested if there is a difference in the mean amount that freshman and seniors spend on texts…

A: Given that random sample of 54 freshman and 52 seniors. Based on these samples a 95% confidence…

Q: | If a random sample of 400 students is selected and the researcher decides to have a margin of…

A: E=0.04n=400p^=0.50degree of confidence=?

Q: I want to construct a confidence interval (CI) for estimating the population mean of IQ scores. I…

A: As per the solution the sampled observations are n=65

Q: random sample of 500 Jordanian firms, it was found that 420 Jordanian firms made a profit, The…

A: Given that Sample size (n) = 500 Films made profit (x) = 420 Sample proportion (p) = 420500=0.84…

Q: The distribution scores on a standardized test is approximately Normal with a standard of =16. If a…

Q: uppose a researcher collected data with n = 200 and came up with a sample mean of 83 and 95%…

A: Given n=200 Mean=83

Q: The confidence interval was (36,45) What was the margin of error? What was the point estimate

A: Answer: From the given data, The confidence interval = (36,45)

Q: A report statesb that 33% of home owners had a vegetable garden. how large a sample is needed to…

A: p=33%=0.33, E=5%=0.05

Q: If n=190 and p' (p-prime) = 0.6, construct a 99% confidence interval. Give your answers to three…

Q: The confidence interval for a population mean is (7.36, 7.52). What the the sample mean and the…

A: Solution: Given information: The confidence interval for a population mean μ is ( 7.36, 7.52) Upper…

Q: A report statesb that 44% of home owners had a vegetable garden. how large a sample is needed to…

A: Answer: Using the given data, A report stated that 44% of home owners had a vegetable garden, P =…

Q: Out of 400 people sampled, 164 had kids. Based on this, construct a 95% confidence interval for the…

A: Given:Sample size = n = 400 peoplePeople having kids = x = 164Confidence level = 0.95So, α = 1 –…

Q: Two random samples of 29 individuals were selected. One sample participated in an activity which…

Q: A survey of 100 customers showed that 36 of them preferred brand B of a particular product. Give a…

A: p = proportion of people vote for BSample size : n = 100Number of favorable outcomes : x =…

Q: The health of the bear population in Yellowstone National Part is monitored by periodic measurements…

A: Given that Sample size n = 54 Sample mean M = 182.9 And pioulation SD = 121.8 The critical value of…

Q: In a random sample of 500 Americans, 50% indicated that they have a cat for a pet. Estimate with 95%…

A: Given information

Q: Ethan is surveying students who are interested in watching television (TV) shows. Ethan has surveyed…

Q: You are testing the claim that the proportion of men who own cats is smaller than the proportion of…

A: As per our company guidelines we are supposed to answer only first question. Kindly repost other…

Q: A sample of 175 U.S. adults is composed of 100 women and 75 men. What is the estimate of the true…

A: Given problem Given that

Q: doctor wants to estimate the mean HDL cholesterol of all 20 to 29 year old females. How many…

A: Given s=11.2 E=2

Q: A motorcycle dealer with the "Hd" brand wants to know the percentage of students in the city "X" who…

A: We have to find confidence interval.

Q: A random sample of 100 employees at a company shows that 42 drive US made automobiles (the rest…

A: A random sample of 100 employees at a company shows that 42 drives US made automobiles p = Sample…

Q: The drug Ziljac is used to treat hypertension. In a clinical test, 4.9% of 290 Ziljac users…

Q: confidence interval for a population mean is (56,78), with a margin of error of 11. What is the…

A: From provided information, Confidence interval for population mean is (56, 78), with margin of error…

Q: For a confidence level of 99% with a sample size of 22, find the t-score. Did not see how to work…

A: The provided information is:

Q: was the percentage of adults who used social media five years ago. Of the 2703 people who responded…

A: (a) The sample proportion is: p= x/n=1758/2703 =0.65 The value of z at 92% confidence level is 1/75,…

Q: The average number of calories in a sample of 50 regular bagels is 405. If the standard deviation is…

Q: A random sample of 100 inmates at a maximum-security prison shows that exactly 10 of the respondents…

A: We can use the sample proportion as a rough approximation of the percentage of victims for the total…

Q: A student found that in a random sample of 300 people in a town, 105 play sports. Based on this…

A: Given that, X = 105 N = 300 90% confidence level

Q: In a clinical test with 500 subjects, 2500 showed improvement from the treatment. find the margin of…

A: we have given that sample size=N=2500 . , favorable cases =X=500 sample proportion…

Q: A teacher gives a test to his class of 25 students. Since he wants to quickly obtain an estimate of…

A: The class of 25 students is considered as the population. Sample size n =12 Sample mean x¯=82 Sample…

Q: A survey was conducted that asked 959 people how many books they had read in the past year. Results…

Q: A random sample of 202 shoppers at bluewater were asked why they chose to stop at location. 93…

A: Given that Sample size n =202 Favorable cases x =93

Q: A scientist conducts an experiement with flowers, one sample of flowers consisted of 278 red dahilas…

A: Given that Sample size n =278 Favorable cases x =108 Sample proportion p^=x/n =108/278 =0.3885

Q: You recently sent out a survey to determine if the percentage of adults who use social media has…

A: Given The percentage of adults who use social media 5 years ago = 62% Out of 2751, 1740 using…

Q: FIND Za2 FOR THE 99.50 CONFIDENCE INTERVAL

A: Find α/2Level of Confidence = 99.5%α = 100% - (Level of Confidence) = 0.5%α/2 = 0.25% = 0.0025

Q: Out of 300 people sampled, 270 had kids. Based on this, construct a 90% confidence interval for the…

A: given data, n=300x=270CI=0.90α=1-0.90=0.10Zc:=Zα/2=Z0.10/2=Z0.05=1.645 [from excel function , code…

Q: Round answers to to 4 decimal places. pi - p2

A: Given : n1 = 278 x1 = 98 n2 = 109 x2 = 65 confidence level,c=0.9…

Question

Suppose Berty, chose from the population of students a sample of 64 students and he confirms that the 99%. Confidence interval of the mean time spent in the sample is between [ 250 ; 350 ] minutes.

If 32 students from the sample use Samsung smartphone and the accuracy level will be within + 3%.

At 95% confidence level, determine the sample size n

Definition Definition Number of subjects or observations included in a study. A large sample size typically provides more reliable results and better representation of the population. As sample size and width of confidence interval are inversely related, if the sample size is increased, the width of the confidence interval decreases.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Similar questions

If n=550 and p' (p-prime) = 0.62, construct a 99% confidence interval.Give your answers to three decimals.
Construct a 95% confidence interval of the population proportion using the given information. x=80 n= 200 Give lower and upper bound
Find the lower limit of 95% confidence interval. An SRS of 36 students were taken from high schools in a particular state. The average test score of the sampled students was 60 with a standard deviation of 13.26. Give the lower limit of the interval approximation.
Fifty-five students were randomly selected from Airbender College, and their average score on a meditation course is 68.22 with a standard deviation of 18.8. Construct a 99% confidence interval for the mean test scores for all students at Airbender College. Also find the margin of error. Round your answers to 3 decimal places.
The drug Ziljac is used to treat hypertension. In a clinical test, 3.7% of 420 Ziljac users experienced dizziness. Construct a 99% confidence interval estimate of the percentage of all Ziljac users who experience dizziness. Confidence Interval: ( %, %) Enter percentages correct to two decimal places.
You recently sent out a survey to determine if the percentage of adults who use social media has changed from 62%, which was the percentage of adults who used social media five years ago. Of the 2283 people who responded to survey, 1635 stated that they currently use social media.a) Use the data from this survey to construct a 94% confidence interval estimate of the proportion of adults who use social media. Record the result below in the form of (#,#)(#,#). Round your final answer to four decimal places.
A confidence interval has been determined to be -6<u<6, what was the sample mean that was used to produce this confidence interval?
Construct a 96% confidence interval if x=75 and n=200. Round your answers to 3 decimal places.
You want to get a 90% confidence interval for the difference between the percentage of females with red hair compared to males with red hair. You sample 76 females and find 34 of them have red hair. You sample 65 males and find 33 have red hair. < p1−p2 <
In a random sample of 670 Americans, 35% indicated that they have a cat for a pet. Estimate with 96% confidence the proportion of all Americans that have cats as pets. Give the confidence interval in interval notation, (LCL,UCL) Give your answer as percentages, to at least 2 decimal places, and use at least 3 decimal places in your critical value. Confidence Interval:
A researcher investigated whether the temperature of milk, x, can be used to predict the milk's pH content, y. She predicted the pH level of a glass of milk with a temperature of 8.45 degrees to be ŷ= 6.795 a)A 95% confidence interval for the mean pH of all milk with temperature 8.45 degrees is calculated to be (6.76, 6.83). Which of the following is the correct interpretation of this confidence interval? -The mean pH level for all glasses of milk having a temperature of 8.45 degrees is somewhere between 6.76 and 6.83, with 95% confidence. -The pH level for one glass of milk with a temperature of 8.45 degrees is somewhere between 6.76 and 6.83, with 95% confidence. -There is a probability of 0.95 that the mean pH level for this glass of milk with temperature 8.45 degrees is between 6.76 and 6.83. -95% of all glasses of milk with a temperature of 8.45 degrees have a pH level between 6.76 and 6.83. b)Suppose we have a glass of milk whose temperature is 8.45 degrees. We…
We randomly sample 600 people in a specific town. 342 of them like cats. Based on this, construct a 95% confidence interval for the true population proportion of people in this town who like cats. Give your answers as decimals, rounded to four places.