customers. They find the average time for there oil change is 4521 miles and a standard deviation of 1234. Find a 90% confidence interval of the true mean. Which t value would you use? A.1.645 B.1.734 C.1.729

customers. They find the average time for there oil change is 4521 miles and a standard deviation of 1234. Find a 90% confidence interval of the true mean. Which t value would you use? A.1.645 B.1.734 C.1.729

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: Patients coming to a medical clinic have a mean weight of 207.6 pounds, with a standard deviation of…

A: given, From given information,we have Mean() = 207.6 pounds Standard deviation() = 22.6 pounds By…

Q: Give the range Give the standard deviation

Q: Assume that adults have IQ scores that are normally distributed with a mean of 103.4 and a standard…

A: Given that,

Q: 1 A population has a mean μ = 87 and a standard deviation = 20 mean and standard deviation of a…

A: A population has a mean μ=87 and a standard deviation σ=26Then we'll find the sampling distribution…

Q: If a set of data has a mean of 12 and a standard deviation of 3, what is the z-score for a value of…

Q: A college counsellor wants to test whether the average full-time student spends more than 18 hours…

A: Given: n= 68.0 ,x̄= 20.0 ,s= 6.5 µ= 18.0 ,degree of freedom= 67.0

Q: A multiple choice exam of 10 questions was given to male and female students. The Grade X for each…

A: A 95% confidence for means difference is: A 95% confidence for the ratio of standard deviations is:

Q: Use this information for Questions 8 and 9. Birth weights at a local hospital have a Normal…

Q: The following data are the distance from the workplace (in miles) for the 6 employees of a small…

A: XX220400864151441936124525∑x=66∑x2=998

Q: #5: Calculate the chi-square test statistic, p-value, and effect size. Report the following measures…

A: Given Information: Month Frequency Observed Jan 0.0025 0 Feb 0.0075 1 March 0.02 5 April…

Q: b. If a contestants time is more than one standard deviation above the mean they are eliminated.…

A: Given that Data values : 15 , 16 , 19, 20 , 21 , 22 , 25 , 25 , 26 , 28 , 32 , 40 Number of data…

Q: A population data has set a mean of 81 and a standard deviation of of 5.2 Find the z score for each…

A: The z-score formula is given by zx=x−x¯s (A) Consider the data x=75x¯=81s=5.2 Substitute these value…

Q: If the mean deviation of the data S= .{22,b,37} is 10. Find the value of b

A: Given: MD=10. Now, by the formula of mean deviation:MD=∑|x-x|n where n is the number of observations

Q: Sotoce sia to aslgrce Jn 14. What is the mean of the sampling distribution of the А. 3.44 erd ni…

A: Here use sampling distribution

Q: ssume that adults have IQ scores that are normally distributed with a mean of 96.9 and a standard…

A: Given Information: Mean (x) = 96.9 Standard Deviation (s) = 23.6

Q: Consider these five data values: 10, 14, 15, 16, 20 The mean is 15.0 and the Standard Deviation is…

Q: Assume that adults have IQ scores that are normally distributed with a mean of 98.5 and a standard…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: 16. If the distance increases by 100 kilometers, the expected increase of shipping cost is closest…

Q: Suppose that the antenna lengths of woodlice are approximately normally distributed with a mean of…

A: Population mean, Population standard deviation, To find:

Q: 1,2,3

A: The average height of grade 10 students is 148. As n is large (=250), the sampling distribution can…

Q: The first quartile is. (Type an integer or decimal rounded to one decimal place as needed.)

A: Assume that adults have IQ scores that are normally distributed with a mean of 100.2 and a standard…

Q: The profits of a mobile company are normally distributed with Mean of R.O (180) and standard…

Q: 1. Multiple Choice: Write the letter of your anwer on the blank provided. A random sample of 111…

A: For the given data Select the correct choice

Q: Use the following table to answer question 5: Running Time School Average Running Time School…

A: Option A is correct

Q: 5. The following data shows the time, in minutes, taken for 12 contestants to complete a task on a…

Q: Assume that adults have IQ scores that are normally distributed with a mean of 101.8and a standard…

A: Let X denotes the adults IQ scores which follows normal distribution with mean 101.8 and standard…

Q: Use the following information to answer Question 7 and Question 8. The marks of six students in a…

A: Since there are two 3 different questions, as per Bartleby rules I did 1st one. Please re post the…

Q: Use z scores to compare the given values. In a recent awards ceremony, the age of the winner for…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: +++++ it. b 10. Which data set has the smallest standard deviation of the x-coordinates?

Q: ACT Scores A survey of 1000 students nationwide showed a mean ACT score of 21.4. A survey of 500…

Q: QUESTION 21 Find the 88th percentile of the tree heights. O A. 128.38 B. 125.37 O C. 129.45 OD.…

A: Given,mean(μ)=112standard deviation(σ)=14

Q: QUESTION 19 Suppose the mean SAT score for a certain year was 1060 with a standard deviation of 194.…

Q: A given set of data has an average of 25, and standard deviation of 5. Use this information to…

A: From the provided information, Average (µ) = 25 Standard deviation (σ) = 5 X~N (25, 5)

Q: If the standard deviation of the data .S={5,20,a} is 15. Find the value of a

A: Given: SD=15. Also, by the formula of standard deviation:SD=∑x-x2n-1

Q: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

A: Obtain the 7th percentile of the distribution. The 7thpercentile of the distribution is obtained…

Q: Which of the following statements is most appropriate about the relationship between x and y in the…

A: From the above graph, we can see that the there is a pattern of heteroscedasticity in the model i.e.…

Q: Assume that adults have IQ scores that are normally distributed with a mean of 98.4 and a standard…

A: X:adults IQ scores X has normally distributed X~N(μ,σ) Mean(μ)=98.4 and Standard deviation(σ)=20.3…

Q: The first quartile is

A: here use standard normal distribution table for z score for 0.25

Q: Complete the following statements about the Empirical Rule. Part: 0/ 3 Part 1 of 3 Approximately %…

A: Solution: It is needed to give the statements about the Empirical rule.

Q: SAT scores: The College Board reports that in 2018 the mean score on the math SAT was 527 and the…

A: Let X: be the Math SAT score.The mean math score() in 2018 is 527, and the population SD is .Sample…

Q: planet far far away from Earth, IQ of the ruling species is normally distributed with a mean of 100…

A: On a planet far far away from Earth, IQ of the ruling species is normally distributed with a mean of…

Q: Use the following set of values for # 10-13. Round answers to nearest hundredth, if necessary. 0.4…

A: Mean = sum(data)/n For odd : Median = ( mid of data ) = (N+1)/2 th data Mode = most repeated…

Question

If the problem below is given:

Suppose that a garage samples 20 customers. They find the average time for there oil change is 4521 miles and a standard deviation of 1234. Find a 90% confidence interval of the true mean.

Which t value would you use?

A.1.645

B.1.734

C.1.729

D.1.725

Expert Solution

This question has been solved!

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

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Similar questions

On a planet far far away from Earth, IQ of the ruling species is normally distributed with a mean of 112 and a standard deviation of 17. Suppose one individual is randomly chosen. Let X = IQ of an individual. d. Find the Inter Quartile Range (IQR) for IQ scores. Round your answers to 2 decimal places.Q1: Q3: IQR:
Which scenario will give you a coefficient of variation of 30%? A. Mean of 30 and standard deviation of 15 B. Mean of 4 and standard deviation of 16 C. Mean of 3 and standard deviation of 3 D. Mean of 10 and standard deviation of 3 Find the range of the given data: 12, 5, 9, 18, 22, 25, 5 A. 5 B. 9 C. 20 D. 25
Q. 6. Calculate quartile deviation and its co-efficient from the data given below : Age of years : 15 30 45 60 75 90 No. of members : 8 12 16 20 6 3
Hope to answer this accordingly.
For a sample with a standard deviation of s = 12, a score of X = 42 corresponds to z = –0.50. The mean for the sample is M = ___. a. 48 b. 45 c. 40 d. 36
This is the data with questions.
A particular fruit's weights are normally distributed, with a mean of 515 grams and a standard deviation of 36 grams. The heaviest 13% of fruits weigh more than how many grams? Give your answer to the nearest gram. Enter an integer or decimal number [more..] Submit Question 2 Type here to search hp esc 12 fs 2 3 4 LO 远 %24 %23
1.
Use the information below to answer Questions #28 and #29. A population has a mean u = 86 and a standard deviation o = 6. Find the population mean of the sample means (HE) with sample size n = 36. Simplify your answer.
A statistician wishes to determine the difference between two population means. A sample of 18 items from Population #1 yields a mean of 205 with a standard deviation of 12. The sample of 15 items from Population #2 yields a mean of 190 with a standard deviation of 10. Assume that the values are normally distributed in each population. How many degrees of freedom are there for this test? a. 18 b. 14 c.15 d. 17
Questions A and B. Please!
Previous Question Researchers measured the data speeds for a particular smartphone carier at 50 airports. The highest speed measured was T76 Mbps. The complete list of 50 data speeds has a mean of x 17.47 Mbps and a standard deviation of s 32.99 Mbps. a. What is the dilference between camer's highest data speed and the mean of all 50 data speeds? b. How many standard deviations is that (the difference found in part (a)? c Convert the camer's highest data speed to az score. d. If we consider data speeds that convert to z scores between-2 and 2 to be neither significantly low nor significantly high, is the camier's highest data speed significant? a. The difference is Mbps (Type an integer or a decimal Do not round) b. The dilference is standard deviations (Round to two decimal places as needed.) c The z score is z (Round to two decimal places as needed.) d. The camer's highest data speed is