Martin and Bianca are going to construct confidence intervals from different simple random samples.  Both confidence intervals will have level 99%.  Martin's sample has standard deviation of 25 and Bianca's sample has standard deviation of 18.  Both sample sizes are the same.   (a) Which confidence interval will have the larger margin of error ?  Or will they both be the same?  Explain why. (b)  Which confidence

Q: Suppose that Felisha is a librarian, and she read in a scholarly journal that the number of words in…

A: Obtain the margin of error of a 99% confidence interval for the mean number of words in all…

Q: A simulation was done to produce sample means for a particular population. If the mean of the…

A: Checking the Options: Option 1: A sample mean of 10.5 and 18.3For…

Q: Bella’s aims to construct a confidence interval for the mean of a normal population with known…

A: The margin of error are reduced  by the following three causes  1. Level of significance As the…

Q: A professors exam scores have been consistent for years and normally distributed. The whole data…

A: From the provided information, Sample size (n) = 80 Population standard deviation (σ) = 1.75 Sample…

Q: Use two confidence intervals to compare the two players, when it comes to points per game. For 33…

A: Followings are the Explanation of the question  Use the t test of confidence interval because the…

Q: T randomly selected 50 text books and found their mean cost to be $248.47 with a standard deviation…

A: Given information is :n=50x=$248.47S=$27.43And also given that 95% confidence interval is…

Q: Suppose we want to estimate the average weight of an adult male in a certain county. A random…

A:

Q: You surveyed business travelers to develop quality ratings for an airport. The maximum possible…

A: Given,sample size(n)=25sample mean(x¯)=6.34sample standard deviation(s)=2.16degrees of…

Q: Suppose you want to test if left-handed individuals have a higher IQ than right-handed individuals.…

A: State the hypotheses. That is, the left- and right-handed individuals have the same IQ. That is,…

Q: 6. Beef consumption in the U.S. has been fallen by 38% since 1976. Suppose a survey of 30 Americans…

A: For the given data find the 90% and 95% confidence interval

Q: The time spent, in minutes, on physical activities per day was recorded for a sample of college…

A: Given information:Two confidence intervals for the mean time spent on physical activities:…

Q: You measure 30 watermelons' weights, and find they have a mean weight of 34 ounces. Assume the…

A: Sample mean = x̅ = 34 Sample size = n = 30 Population S.D = σ = 11.3

Q: A researcher wanted to check whether the percentage of Canadian adults with obesity has decreased in…

A: Number of Canadian adults in 2005= 75 Number of Canadian adults in 2009 = 120   significance level =…

Q: What is normal, when it comes to people's body temperatures? A random sample of 130 human body…

A:

Q: An agronomist would like to estimate the average weight of all Indian River County grapefruits. The…

A: The sample size is 262, sample mean is 203 and population standard deviation is 20.

Q: you plan to dive to san antonio from college station to visit your friend lupita. that friend is…

A: The summary of statistics is, The degree of freedom is,

Q: You are going to estimate how long a person holds down a button on their calculator by randomly…

A: Given Standard deviations=0.15 Width=0.02

Q: Females in a random sample have an average height of 63 inches with a standard deviation of 1.5…

A: Confidence interval: Confidence interval is an interval such that the probability of the unknown…

Q: Researchers often create multiple 95% confidence intervals based on a given data set. For example,…

A: Level of Significance: In testing of hypothesis, Level of Significance is the probability of…

Q: A musicologist is currently writing a report about pop songs in the late 2010s. As a part of her…

A: Givensample size(n)=222Mean(x)=3.05standard deviation(σ)=0.3

Q: Suppose an individual was studying temperature’s effect on the crime rate. The researcher looked at…

A: Note: Based on the computations using the technology, the calculations given here is correct.

Q: An agronomist would like to estimate the average weight of all Indian River County oranges. The mean…

A: For the 97% confidence interval:E = 1.30A 97% confidence interval is given by 58.3 ± 1.30For the 96%…

Q: . A stationary shop would like to estimate the average retail value of greeting cards that it has in…

A: Sample size (n) =20 Sample mean (x-bar) = 167 Standard deviation (s) =32 The 95% confidence interval…

Q: The definition of a 90% confidence interval is that we expect that close to 90% of a large number of…

A:

Q: Smart phone: Among 253 cell phone owners aged 18-24 surveyed, 110 said their phone was an Android…

A: The answer is attached below,

Q: Suppose the mean of the pilot sample follows a normal distribution with a mean of 7 (from the null…

A: question: Suppose the mean of the pilot sample follows a normal distribution with a mean of 7 (from…

Q: ou may need to use the appropriate appendix table or technology to answer this question. At a…

A: Solution: Given information: n=100 Sample size x= 833 Sample mean μ= 800  Population mean σ= 150…

Q: Samples of two different models of cars were selected, and the actual speed for each car was…

A:

Q: Different standard deviations: Martin and Bianca are going to construct confidence intervals from…

A: The formula for the margin of error (ME) in a confidence interval is:

Q: 2. Again use the data from Table 4 [ Fifty randomly-selected Durham burials (1960-1969) ] . 90%…

A: Let X represents the Age of 50 randomly selected Durham burials between 1960 to 1969.         X…

Q: Suppose a researcher wants to test if the average diastolic blood pressure in Irish-Americans is…

A: It is given that the average diastolic blood pressure in the general population is 70 mmHg.…

Q: company manufactures a certain over-the-counter drug. The company samples 80 pills and finds that…

A: We have given that  Sample size n = 80 Sample mean = 325.5 Standard deviation s=10.3 90%confidence…

Q: Q5. A simple random sample of 450 residents of Payatas is taken to estimate the proportion of people…

A: Given information We have given that; in a random sample of 450 residents of Payatas is taken to…

Q: The standard deviation of SAT scores for students at a particular Ivy League college is 250 points.…

A: Given, σ = 250Margin of Error = 25         To find, a) Find sample ize for raina's 90% confidene…

Q: The mean IQ for the entire population in any age group is known to be 100 with a standard deviation…

A: The random variable IQ follows normal distribution. The population standard deviation is 15. The…

Q: researchers are concerned about the impact of students working while they are enrolled in classes,…

A: It is given that sample mean is 7.1 hours and the standard deviation is 5 hours.

Q: According to a report on sleep deprivation by the Centers for Disease Control and Prevention, the…

A: From the provided information,

Q: A company was checking the number cars that parked in their lot each day and they estimated the…

A: Part 1: Given information: σ=1.6n=45X¯=13.2Confidence level=90%Significance level is 10% From the…

Q: 6. A sample of 15 students was used to estimate the performance of graduates of a certain college on…

A: Given : A sample of 15 student's was used to estimate the performance of graduates of a certain…