A school bus driver records the time (in minutes) it takes to commute to school for six days. Those results are: 25, 22, 17, 20, 15, and 10. Using an alpha value of ? = 0.10, test if the mean time is significantly different than 20 minutes.
Q: the variance and standard deviation are based on the________________?
A: Variance, standard deviation and mean deviation:Variance is the average of squared difference of…
Q: Musca domestica L. or common houseflies have wing lengths that are found to be normally distributed.…
A: We want to complete above question from given information
Q: The Stanford-Binet IQ test is scaled so that scores have a mean of 100 and a standard deviation of…
A: Let "X" be the Stanford-Binet IQ test
Q: A sample of 124 kissing couples were observed, with 44 of them leaning their heads to the left. Use…
A: The test statistic for One sample proportion test is as follows…
Q: A national achievement test is administered annually to 3rd graders. The test has a mean score of 80…
A: A national achievement test is administered annually to 3rd graders. The test has a mean score of 80…
Q: An analysis of a data set (N = 16) has revealed that its standard deviation (SD) of 2. Then, what is…
A: GivenN=16standard deviation(SD)=2
Q: A sample of n = 20 scores has a M = 20 and a variance of 9. What is the standard deviation?
A:
Q: THME REMAIIN: 02:53:15 Response time is an important statistic for measuring the effectiveness of a…
A:
Q: A sample of the number of sick days used by employees at a clinic is as indicated: 0, 0, 1,…
A: Given data 0,0,1,1,2,4
Q: A repeated-measures, a matched-subjects, and an independent-measures study all produce a t statistic…
A: From the provided information, A repeated-measures, a matched-subjects, and an independent-measures…
Q: For a certain brand of canned corn, the company claims that the mean weight of the contents of the…
A: We need to prepare Hypothesis statements
Q: All the following are measures of association except.... Select one or more: Da. range DD VARIANCE…
A:
Q: Express the quartiles, Q1, Q2, and Q3, of a normally distributed variable in terms of its mean, μ,…
A:
Q: Suppose that it is reasonable to regard these three samples as random samples from the three student…
A:
Q: On a recent quiz, the class mean was 76 with a stanbard deviation of 3.1. Calculate the z score (to…
A:
Q: the assumption that the t test for independent samples makes regarding the amount of variability in…
A: Independent Two Samples t-test:Suppose there are two populations independent of one another. A…
Q: The 2018 Math Portion of the SAT score are normally distributed with a mean of 527 and a standard…
A: Empirical Rule: If a population has bell shaped distribution with mean µ and standard deviation σ ;…
Q: A dataset has a mean of 48.1 and a standard deviation of 6.3. What is the z-score of the value 18.5,…
A: Solution Given That, A dataset has a mean of 48.1 and a standard deviation of 6.3. What is the…
Q: A sample of 12 scores has a variance of s2 = 48. What is the estimated standard error for the sample…
A:
Q: Find the standard deviation of the reaction times. 0.7
A: Let X denote the reaction times of a drug. We have to calculate the SD of sample of size n = 12
Q: The length of time it takes a Grade 11 student to play the Candy Crush computer app follows a normal…
A: Given that The length of time it takes a grade 11student to play the candy crush computer is…
Q: Which of the farms are unusual (more than two standard deviations from the mean)? S
A: Given that Mean = 1600 And SD = 300 Also the distribution is bell shaped.
Q: Astudy was conducted on the life of Duracell batteries and on the life of Energizer batteries. The…
A: NOTE-AS PER POLICY I HAVE CALCULATED FOR THE FIRST MAIN QUESTION ONLY
Q: A sample of n=4 has test scores of 0, 0, 12, 12 What is the range, the variance and the standard…
A: Given information- Sample size, n= 4 Given test scores are- 0, 0, 12, 12 We know that- Range =…
Q: A particular battery claims to have a mean life of 400 hours with a standard deviation of 30 hours.…
A: Mu=400, sigma=30 P(X>420)= ?
Q: The monthly income of residents of Daisy City is normally distributed with a mean of $3000 and a…
A: GivenMean(μ)=3000standard deviation(σ)=500
Q: A sample of n = 100 scores is selected from a population with μ = 80 with σ = 20. On average, how…
A: Given information- Population mean, µ = 80 Population standard deviation, σ = 20 Sample size, n =…
Q: A sample of 4 scores has a variance of s2 = 64. What is the estimated standard error for the sample…
A: Standard Error: Standard error gives the accuracy of a sample mean by measuring the…
Q: The police chief selects a sample of 49 local police officers from a population of officers with a…
A:
Q: The police chief selects a sample of 49 local police officers from a population of officers with a…
A: Given n=49, x̄=74, μ=72, σ=7 , ɑ=0.05 Test the hypothesis at ɑ=0.05
Q: A population has a standard deviation of 18 on average how much difference should exist for a random…
A: From the provided information, Population standard deviation (σ) = 18 Sample size (n) = 36
Q: Nabisco claims that Chip Ahoy Cookies have an x=28.67 per cookie with a SD=2.67. Assuming this…
A: Here, the sample standard deviation is given as 2.67.
Q: The diameter of a mason jar is 3 inches but can be as large as 3.05 inches and as small as 2.95…
A: From the question we'll find the value of Cpl. While we have given the UCL = 3.05 and LCL = 2.95…
Q: A population with µ = 587 and σ = 12 is transformed into z-scores. After the transformation, what…
A: It is given that a population with mean is 587 and the standard deviation 12.
Q: A population has a standard deviation of 18 on average how much difference should exist for a random…
A: A population has a standard deviation of 18.
Q: The data set has size 40. Approximately how many observations lie within two standard deviations to…
A: 68-95-99.7-rule: Let X be an observation from a normal distribution, having mean µ and standard…
Q: A population has a mean of μ and a standard deviation of . a. If 3 points were added to every…
A:
Q: Consider a population with variance 41 and mean 1. What is the z-score for a the value x = 20? Round…
A: Given: Variance= 41 Mean =1 To find: z-score for the value x=20
Q: Assume that adults have IQ scores that are normally distributed with a mean of 100.7 and a standard…
A: Given Data : Population Mean,μ = 100.7 Population Standard Deviation,σ = 18.9
Q: A particular fruits weights are normally distributed, with a mean of 797 grams and a standard…
A: Let us assume X= weight of a particular fruit Given that X follows a normal distribution with mean=…
Q: The following data represents the discharge of an irrigation channel during a specific time.…
A: Given information: The data represents the continuous frequency distribution of time versus…
Q: A traffic study of 1,600 vehicles that passed by a checkpoint showed that their speeds were normally…
A: Note- Since both are different questions, so according to our policy we can answer only one…
Q: To run post hoc tests using the Tukey HSD, you must first find the Studentized Range statistic that…
A: Option a) is correct. The statement is true.
Q: The police chief selects a sample of 49 local police officers from a population of officers with a…
A:
Q: An instructor gives his class an achievement test which, as he knows from years of experience,…
A:
Q: A two-sided t-test for a population mean is conducted with H0: = 80. If a 99 percent t-interval…
A: Confidence intervals use data from a sample to estimate a population parameter. Hypothesis tests use…
Q: You are asked to calculate the 94% Cl for the mean value of a normally distributed population with…
A:
Q: A researcher would like to determine if relaxation training will affect the number of headaches for…
A: Let μ1 denotes the average number of headaches suffered before training and μ2 denotes the average…
Q: A sample of n = 16 scores is selected from a population with μ = 80 with σ = 20. On average, how…
A: From the provided information, it is known that
Q: Use z scores to compare the given values. The tallest living man at one time had a height of 245…
A: The z-score of a random variable X is defined as follows: z = (X – µ)/σ. Here, µ and σ are the mean…
A school bus driver records the time (in minutes) it takes to commute to school for six days.
Those results are: 25, 22, 17, 20, 15, and 10. Using an alpha value of ? = 0.10, test if the mean
time is significantly different than 20 minutes.
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 6 images
- whats the value of alpha?How many hours of sleep do people get by listening to music? I record 10 subjects’ hours of sleep after they listen to 4 types of music: White noise, Rock, Pop, and Classical. For each music condition, they provide an average amount of hours of sleep they got for 1 week. Using the following data, test whether there is a significant difference in hours of sleep between types of music at an alpha of 0.01. Subject White noise Rock Pop Classical 1 5 5 7.5 9 2 9.5 6.5 7 9 3 7.5 6 7 10 4 8 6 7 8 5 8.5 5 6 8 6 6 5.5 7 10 7 7 6.5 9 9 8 8 5 5 9.5 9 8 6 7 8 10 8 7 7.5 7 What is the null hypothesis? _______________________ What is the alternative hypothesis? __________________ What is the critical F value? _________________How many hours of sleep do people get by listening to music? I record 10 subjects’ hours of sleep after they listen to 4 types of music: White noise, Rock, Pop, and Classical. For each music condition, they provide an average amount of hours of sleep they got for 1 week. Using the following data, test whether there is a significant difference in hours of sleep between types of music at an alpha of 0.01. Subject White noise Rock Pop Classical 1 5 5 7.5 9 2 9.5 6.5 7 9 3 7.5 6 7 10 4 8 6 7 8 5 8.5 5 6 8 6 6 5.5 7 10 7 7 6.5 9 9 8 8 5 5 9.5 9 8 6 7 8 10 8 7 7.5 7 Complete the ANOVA summary table: Source of Variation Sums of Squares df MS (Variance) F Between-groups Within-groups (error) Total What do we conclude? Using a bonferroni correction, run a post-hoc test on the type of music and…
- By selecting a smaller alpha level, it _____.andres asked if there is a relationship between the quality of sneakers worn by a sample of 20 volleyball players and their average number of point scored per game. he computed r= +.21 and immediately claimed he had evidence that better-quality sneakers are related to better performance (a) is his claim correct? why? (b) what are Ho and Ha? (c) with alpha=.05, what is rcrit ?The amount of oxygen consumption (ml/min) was measured in 6 individuals over two 10- minute periods while sitting with their eyes closed. During the first period, they listen to an exciting adventure story and then again, an hour later while they heard restful music. Based on the results shown, is oxygen consumption different depending on whether it is a story or music one is listening to? The data is in Table 2 and test at an alpha of 0.05. Table 2. Oxygen consumption (ml/min)