Question

Discuss the effect of following on the width of a confidence interval.

a. Confidence level

b. Sample size

c. Sample mean

d. Population standard deviation (sigma)

Expert Answer

1 Rating

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

Data

Related Statistics Q&A

Find answers to questions asked by students like you.

Q: Do parts  a nd b

A: We can easily find Mean and Standard deviation for face to face and Virtual learning by using MS-Exc...

Q: A population has a mean of 80 and a standard deviation of 7. A sample of 49 observations will be tak...

A: Click to see the answer

Q: A sample of size 52 will be drawn from a population with a mean of 18 and a standard deviation of 13...

A: Click to see the answer

Q: 1. Given the random sample results below showing the percentages of people who support the death pen...

A: According to the scenario, the random samples of males and females are given. The samples are of sup...

Q: You are conducting a test of the claim that the row variable and the column variable are dependent i...

A: Denote oij as the observed frequency for ith row and jth column (i =1, 2; j =1, 2,3) and eij as the ...

Q: In a study examining the effect of humor on interpersonal attractions, McGee and Shevlin (2009) foun...

A:   The given summary statistics is, M=4.42,σ=0.60,n=16 Significance level, α=0.05 Step 1: Null and th...

Q: The national center for health statistics has found that there is a 5.01% chance that an american ci...

A: There is 5.01% chance that an American citizen will die from an accident.

Q: 11.6.65           A die is tossed. Find the odds against rolling a number greater than 1. T...

A: The odds against of event A is, (1 - P(A))/P(A).

Q: A poll of 2,088 randomly selected adults showed that 94​% of them own cell phones. The technology di...

A: The sample size is 2,088.

Q: Find the 90% confidence interval for the average shell length of all N. trivittata sea snails. What ...

A: Given: As the population standard deviation is not known, we will use t-distribution. The degrees...

Q: Question 1 Select all that apply.   Newborn Brain Damage Researchers studied 208 infants whose b...

A: [  Note: Since you have asked multiple questions, we will solve the first question for you. If you w...

Q: A team of researchers is investigating a drug for reducing systolic blood pressure. A group of 6 sub...

A: Click to see the answer

Q: An investigation is carried out to determine whether face to face or virtual learning is more effect...

A: Sample mean for Virtual: X¯Virtual=Sum of observationsnumber of observations           =66+75+.....+...

Q: An investigation is carried out to determine whether face to face or virtual learning is more effect...

A: Click to see the answer

Q: Not sure what went wrong? Thank you!

A: Click to see the answer

Q: please use the calculator method to work this how you would work it in a ti-83 or ti-84 calculator  ...

A: The given informations are: μ=10.5, σ=2.2 n = 50 x = 11

Q: The 2019 Annual report also reported the age of 8 Executive Officers:   It is known that these 8 e...

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case yo...

Q: The mean length of one-year-old spotted flounder, in millimeters, is 124 with standard deviation of ...

A:   Hello, Thanks for posting your question here.    Since you have asked multiple question, we will ...

Q: You are conducting a test of homogeneity for the claim that two different populations have the same ...

A: Denote oij as the observed frequency for ith row and jth column (i =1, 2; j =1, 2) and eij as the ex...

Q: Consider a binomial experiment with n = 10 and p = 0.1. a. Compute /(0) (to 4 decimals). f(0) %3D b....

A: Click to see the answer

Q: A study of teenage suicide included a sample of 123 girls and 96 boys between ages of 12 and 16 year...

A: Click to see the answer

Q: A population has a mean of 80 and a standard deviation of 7. A sample of 49 observations will be tak...

A: Click to see the answer

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A drug is us...

A:  

Q: A professor using an open source introductory statistics book predicts that 10% of the students will...

A: a) The hypotheses are H0:pbuy=0.10, pprint=0.55, pread = 0.35  H1: Atleast one of the claimed probab...

Q: Claim: A majorityof adults would erase all of their personal information online if they could. A sof...

A: The claim is that a majority of adults would erase all of their personal information online if they ...

Q: Use a normal distribution as an approximation to the binomial probability distribution toapproximate...

A: It is given that p = 0.8 and n =20.

Q: The Longmont Computer Leasing Company wishes to estimate the mean number of pages that will be print...

A: The margin of error for a confidence interval is gives by m=zσn, where z-score depends on the confid...

Q: The display provided from technology available below results from using data for a smartphone​ carri...

A: Click to see the answer

Q: Parking at a large university can be extremely difficult at times. One particular university is tryi...

A: It is given that the 95% confidence interval for the population mean time to find a parking spot is ...

Q: Using the standard Normal distribution tables, what is the area under the standard Normal curve corr...

A: The area under the normal curve corresponding to P(-0.5<z<1.2) is obtained as- P-0.5<z<1...

Q: Suppose 243 subjects are treated with a drug that is used to treat pain and 50 of them developed nau...

A: Given, The number of subjects treated with a drug that is used to treat pain is n=243 The number of ...

Q: GPA of SMSU students is normally distributed with standard deviation (sigma) = 0.8. The average GPA ...

A: Click to see the answer

Q: A machine that cuts corks for wine bottles operates in such a way that the distribution of the diame...

A: Mean µ = 4 cm Standard deviation σ = 0.1 cm The specification of the corks will be defective if P(X&...

Q: The undergraduate grade point averages (UGPA) of students taking an admissions test in a recent year...

A: Solution: Let X be the undergraduate grade point average. From the given information, X follows norm...

Q: In Jolie’s new Thai restaurant, she observes the age of her customers and notes down which of the gr...

A: Jolie for her new restaurant divided Age of her customer in 2 categories -18 years old and below’ or...

Q: The psychology department is gradually changing its curriculum by increasing the number of online co...

A: Denote μ as the population mean score.   It is needed to check, whether the new online course is sig...

Q: Find the area of the shaded region under the standard normal curve. E Click here to view the standar...

A: Click to see the answer

Q: QI. For given data A: 16,17, 25, 26, 32, 34, 38, 40, 42, B: 14,16,24,28, 32, 35, 37, 42, 43, 45, 47 ...

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

Q: Which of the following are the signs which can be found in the null hypothesis? > %D V II VI

A: Click to see the answer

Q: Ackerman and Goldsmith (2011) report that studentswho study from a screen (phone, tablet, or compute...

A: a.

Q: What is the sensitivity and specificity for each of the screening tool values? New Screening Too...

A: Sensitivity: The formula for sensitivity is obtained as given below: Sensitivity=Number of true posi...

Q: 11.6.19         You randomly select one card from a​ 52-card deck. Find the probability of s...

A: Given, A 52 playing cards in which 26 are black and 26 are red. And In 26 red having 2 four and othe...

Q: 12.. For a normal population with u = 100 and o = 20: a. What is the probability of obtaining a samp...

A: From the provided information, Mean (µ) = 100 Standard deviation (σ) = 20 X ~N (100, 20)

Q: Compute the SS for the following sample. Then, compute the sample variance and standard deviation. S...

A: The mean of the sample 1,3,1,1 is  mean ( x̄ )=(1+3+1+1)/4 =1.5 The sum of square (SS) can be calcul...