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: 6. Ackerman and Goldsmith (2011) report that students who study from a screen (phone, tablet, or…

A: Given : μ = 77 σ = 8 n = 16

Q: oduce a slightly more "conservative" answer. the following data pairs, A represents birth rate and B…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: A distribution of exam scores has a mean of μ = 42. If your score is X = 46, which standard…

A: we have to find which sd will give better score.

Q: A population of scores has μ = 25 and σ = 1. If 3 points are added to every score in the population,…

A: From the given information, Consider , X be the random variable which denotes the scores. Ex=μ=28σ=1…

Q: The mean salary at a local industrial plant is $29,600$⁢29,600 with a standard deviation of…

A: Suppose the random variable x defines the amount of salary.

Q: Next Question A consultant has three sources of income-trom teaching short courses, from selling…

A: Given, Annual incomes from the different sources And their respective mean and sd Let, C: annual…

Q: 13. Compute the test statistic. A. 0.55 B. 1.50 C. 1.59 D. 1.60 14. Determine the critical value. A.…

A: For the given data Perform t test for one mean

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: A distribution of values is normal with a mean of 50 and a standard deviation of 25. From this…

A: GivenMean(μ)=50standard deviation(σ)=25sample size(n)=31

Q: [1] The lengths of all hullback trout are normally distributed: N(16 inches, 3.6 inches), means that…

A: The lengths of hullback trout are normally distributed with mean inches and the standard deviation…

Q: Assume the number of years in prison before being exonerated is normally distributed for both white…

A: From the provided information, Mean and standard deviation of time White male are in prison as…

Q: 5. A random sample of 43 foreign language movies made since the year 2000 had a mean length of 112.5…

A: Here, the parent distribution from which the sample is taken is unknown and also, the population…

Q: In this problem, assume that the distribution of differences is approximately normal. Note: For…

A: As per our policy, we answer only three sub parts at a time. So, kindly send another request for the…

Q: A physical therapist wanted to know whether the mean step pulse of men was less than the mean step…

A: Given that A physical therapist wanted to know whether the mean step pulse of men was less than the…

Q: Use the following information to answer questions 13 - 15. The following frequency distribution…

Q: extremely right-skewed Suppose the waiting time was recorded for a random sample of 42 vehicles. For…

A: It is given that the numerical values of sample are 54.5 and 13.2. We know that Parameter: The value…

Q: In this problem, assume that the distribution of differences is approximately normal. Note: For…

A: A B Difference = A–B 12.5 9.6 2.9 13.2 14.3 -1.1 12.6 10.7 1.9 12.1…

Q: The population standard deviation for the temperature of beers found in Scooter's Tavern is 0.21…

A: Given that, Population standard deviation = 0.21 Margin of error = 0.1 90% confidence level

Q: Question 3: At one college, GPA's are normally distributed with a mean of 3 and a standard deviation…

A: The mean is 3 and the standard deviation is 0.6.

Q: Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout.…

A: For the given data Perform t test for one population mean

Q: 50 years and a standard deviation of 10. Present this using empirical rule if it is a symmetrical…

A: Let X be the random variable the age of golfers in the club. Given that, X ~ N(μ=50 years, σ=10) To…

Q: V. For the following data set, complete the table and determine the mean, median, mode and standard…

A: In a study of the time in minutes it takes an untrained mouse to run a maze , a researcher recorded…

Q: In this problem, assume that the distribution of differences is approximately normal. Note: For…

A: Given: A: {12.7, 13.2, 12.6, 12.1, 11.4, 11.1, 14.2, 15.1,12.5, 12.3, 13.1, 15.8, 10.3, 12.7, 11.1,…

Q: population has a mean u =163 and a standard deviation o = 28. Find the mean and standard deviation…

A: μx¯ = μ

Q: Use the following data set for the next two problems. High-density lipoprotein cholesterol (HDL)…

Q: Problem #1: A sample of 20 vehicles is outfitted with snow tires. The vehicles travel 85 km/h in…

A: It is required to test whether the true mean stopping distance differs from 151 meters.The sample…

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: For a data set of the pulse rates for a sample of adult females, the lowest pulse rate is 31 beats…

A: Given: Lowest pulse rate is 31 beats per minute. Mean of the listed pulse rate is x=79.…

Q: B. Solve the following problems. 1. The mean of the students in Grade 1 section Newton is 125 cm and…

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: Note: Solve the following problems. Show all solutions. Round off final answers to 3 decimal places.…

A: Given that. X~N( μ , ?) μ=280 , ?=60 Z-score =( x - μ )/?

Q: Example 11.3 sample mean was found to be Rs 900 and the standard deviation Rs 200. Construct an…

Q: that the scores have a standard deviation of 9. A psych Construct a 95% confidence interval for the…

A: An Existing inventory for a test measuring self-esteemσ=9 indicates that the scores have a standard…

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…

Q: Find the mean for the given frequency distribution. Round to three decimal places. O A. 2.907 O B.…

A: The mean is calculated as Mean =∑fx∑f

Q: In this problem, assume that the distribution of differences is approximately normal. Note: For…

A: Given, the birth rate and death rate per 1000 population. n=16 The hypothesis to be tested is…

Q: For a data set of the pulse rates for a sample of adult females, the lowest pulse rate is 39 beats…

A: Hello there! there are more than 3 subparts in the question. According to our policies cannot answer…

Q: how many beers must we sample? Round to the nearest beer.

Q: a) The maintenance department has tested the batteries in one of its stores. The tested batteries…

A: Here, we have to calculate the mean and variance of given grouped data.

Q: Assuming the distribution of the above scores is normal, the percentage o people who scored within 1…

A: Let z be the random variable follows normal distribution

Q: The E&M 200 students took the exam, and the distribution of this data was bell- shaped. The average…

Q: A population of N=5 scores has a mean of µ=7. After one score is removed, the mean is found to be…

Q: umbers 5-8 refer to the following problem. The average precipitation for the first 8 months of the…

A: Note: As per the guidelines, we are only allowed to solve three subparts, please post the other…

Q: The following information is slightly different for each student but very close to the actual real…

A: It is given that: The population mean for a black personμ=13.70 The population standard deviation…

Q: A student who took Stat 2 last semester learns that their overall course score was at the 85th…

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

Please answer question 6.3
Tina catches a 14-pound bass. She does not know the population mean or standard deviation. So she takes a sample of five friends and they say the last bass they caught was 9, 12, 13, 10, and 10 pounds. Find the t and calculate a 95% (α = .05) confidence interval.
A statistics class is estimating the mean height of all female students at their college. They collect a random sample of 42 female students and measure their heights. The mean of the sample is 65.3 inches and the sample standard deviation is 5.4 inches. Find the 90% confidence interval for the mean height of all female students in their school? Assume that the distribution of individual female heights at this school is approximately normal. 1. The t value is 1.3025 2. The standard error has a value of -- 3. The margin of error has a value of 4. Find the 90% confidence interval for the mean height of all female students in their school
A population of scores has µ = 10 and σ = 2. If every score in the population is multiplied by 4, then what are the new values for the mean and standard deviation? Group of answer choices
There are several sections of Statistics; some in the morning and some in the afternoon. We randomly select n1 40 from the morning section and 44 from the afternoon section. The averages n2 of their scores are X1 76.3 for the morning section and X, = 71.9 for the afternoon section. The known standard deviations of their scores are 01 12.05 for the morning section and 02 13.06 for the afternoon section. Test the claim that the average for all students in the morning and afternoon section is the same. Use a a = 0.05 significance level. a. What is the negative critical region? Give your answer to two decimal places. z c. What is the test statistic? Give your answer to two decimal places. z = d. Do we reject or fail to reject the null hypothesis? OReject Ho OFail to reject Họ
In the past, the mean age of consumers of a product was 38 years. Recently the product has been drastically changed. In order to determine whether there has been a change in the mean age of the product consumers, a sample of 16 consumers is selected. The mean age in the sample is 33 years and the standard deviation in the sample is 10 years. Let u = the mean age of the current product (Problem Set #7) consumers. The value of the test statistic is Oa. -2.00 O b.-1.60 OC .0.8 O d. 4.21
The mean salary at a local industrial plant is $29,600 with a standard deviation of $5700. The median salary is $25.300 and the 59th percentile is $30,200. Step 5 of 5: If Tom's salary has a z-score of 0.6, how much does he earn (in dollars)?
Which of the following statements is not true? There is only one median for each variable. One definition of the median states that, for an odd number of observations, the median is the middle score when scores are placed in order of magnitude. Another term for the median is 50th percentile. The median is generally more sensitive to (i.e., affected by) the presence of a few extreme observations than is the mean.
Please answer items D to H only. I really need help
Use the following information to answer the next four questions. A manager of a fast-food chain wants to analyze the length of time a vehicle spends at the drive-through window waiting for an order. According to records obtained from the chain, the population mean time spent waiting at the window was 236.5 seconds with a population standard deviation of 34.8 seconds. It is known that the distribution of time waiting at the window is extremely right-skewed. The waiting time was recorded for a random sample of 21 vehicles. For the random sample obtained, the sample mean waiting time was found to be 254.6 seconds with a sample standard deviation of 23.1 seconds. In this example, for the numerical values 236.5 and 254.6 O a. 236.5 is a parameter, 254.6 is a statistic O b. Both are parameters O C. Both are statistics O d. 236.5 is a statistic, 254.6 is a parameter
A sample of n = 10 scores has a mean of 7. If a new score of X = 18 is added to the sample, what will be the new value for the sample mean? 8.0 8.8 9.78 6.36
A population of scores has a mean of µ=89, a median of 87 and a mode of 85. What is the most likely shape for the population distribution? Symmetrical Positively skewed Negative skewed It cannot be determined from the information given O O