In a randoms sample of six people, the mean driving distance to work was 19.7 miles and the standard deviation was 6.1 miles. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 90% confidence interval for the population mean u. Interpret the results.

Q: Suppose the heights of women at a college are approximately Normally distributed with a mean of 66…

A: Measures of position:The most common measures of position are percentiles, quartiles and standard…

Q: Suppose a convenience store near a college campus sells two complementary products, energy drinks…

A: Let, X denotes the number of energy drinks and Y denotes the number of snacks sold per students.…

Q: Use a = 0.10. Construct a 90% confidence interval on the difference in means. O a. Cl on the mean:…

A: It is given that  Sample mean, x̅1 = 18 Sample mean, x̅2 = 24 Population standard deviations, σ1 =…

Q: minimum shoulder girth is 87 cm and the maximum shoulder girth is 134 cm. The mean shoulder girth is…

A: Solution: Given information:  Let x = Shoulder girth and y= height  x = 108.87sx=10.12y= 173.86 sy=…

Q: A sample of 25 bottles of orange juice were measured and the sample standard deviation is 1.8…

A:

Q: The number of ounces of water a person drinks per day is normally distributed with a stsndard…

A:

Q: Assume that the number of pieces per bag has a mean of 264 with a standard deviation of 3. use the…

A: Given :  the number of pieces per bag has a mean of , μ=264  a standard deviation of , σ =3   We…

Q: A particular fruit's weights are normally distributed, with a mean of 486 grams and a standard…

A:

Q: ssume that adults have IQ scores that are normally distributed with a mean of 100.6 and a standard…

A: Solution:Let X be the adults IQ score has normally distributed with mean  and standard deviation

Q: A random sample of male college baseball players and a random sample of male college soccer players…

A: Given: Sample size of basketballn1=25 Sample size of Soccern2=25 Basketball Soccer 188 165…

Q: The lengths of trout in a lake are normally distributed with a mean of 30 inches and a standard…

A: The z-score denotes how many standard deviations an individual raw score is away from the mean The…

Q: Hypothesis Tests - 2 samples x C Solved: One of the questions b Answered: The mean numbero x P…

A: Answer:- The independent t-test implies that the means of the two independent populations are…

Q: The mean number of English courses taken in a two-year time period by male and female college…

A: Answer:-

Q: A set of data items is normally distributed with a mean of 20 and the standard deviation of 8.…

A: z-score: A z-score describes how many standard deviations a data item in a normal distribution lies…

Q: A painter purchases two types of paints, paint A and paint B. The amount of paint A purchased per…

A: Expected amount spent by firm on both types of paints combined is as follows…

Q: obiles? Assume the samples are random and independer dard normal distribution table. dard normal…

A: Let μ1 denote the mean braking distance of automobile A. Let μ2 denote the mean braking distance of…

Q: 1,500 women followed the Atkin’s diet for a month. A random sample of 30 women gained an average of…

A:

Q: The mean number of English courses taken in a two-year time period by male and female college…

A: Here we will conduct a 2 independent sample t-test to test the equality of the average number of…

Q: Two different species of trees have heights that are approximately normal in distribution. Tree A…

A: Given that Tree A has a mean of 36 feet and a standard deviation of 3 feet.   Tree B has a mean of…

Q: for a population with a standard deviation of 5 and mean of 48, draw a bell shaped curve, marking…

A: Given data, Mean=48 sd=5 Draw a bell shaped curve?

Q: community college Math instructor feels that the average number of units students enroll in each…

A: Hypothesis testing  Hypothesis testing is conducted for the parameters of the population like…

Q: A ski gondola carries to the top of a mountain. Assume that weights of skiers are normally…

A: Given :  Load limit = 3500lb Number of passengers = 25 mean = 180lb standard deviation = 44l

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

A: Determine the level of significance.   Significance level:    In order to decide how small the…

Q: A researcher is conducting a study to determine the mean trough dosage of medication for a…

A: The following information is provided that is required to compute the sample size: Required…

Q: A particular fruit's weights are normally distributed, with a mean of 621 grams and a standard…

A: It is given that the fruits weights follow normal distribution with mean 621 and standard deviation…

Q: Suppose a shopkeeper is making bags of 2 pounds of flou bulk. The shopkeeper keeps adding flour to a…

A: Given that.   X~N( μ , ?)   μ=2 , ?=0.08   Z-score =( x - μ )/?

Q: To compare the dry braking distances from 30 to 0 miles per hour for two makes of automobiles, a…

A: Given that  α=0.10That is,α=10%Level of significance =10%

Q: In a county male height is normally distributed with a mean of 175 cm and a standard deviation of 6…

A: Given that.   X~N( μ , ?^2 )   μ=175   , ?=6   Z-score =( x - μ )/?

Q: A particular fruit's weights are normally distributed, with a mean of 464 grams and a standard…

A: Let "x" be the weight of the fruit in grams. Sketch the normal curve and shade the area of 0.18…

Q: The carapace length of an adult is normally distributed with a mean of 17.55 mm and a standard…

A:

Q: The National Center for Health Statistics reports that the LDL cholesterol for adults has a mean of…

A: Sample size n=23 Sample mean=144.3 Population standard deviation =40

Q: the average reoair cost of a microwave oven is $55, with a standard deviation of $8. the costs are…

A: Solution: Let X be the cost. From the given information, X follows normal distribution with mean…

Q: Let X be the resting heart rate of a physically fit man. Assume that the resting heart rate for fit…

A: Let X be the resting heart rate of a physically fit man. Assume that the resting heart rate for fit…

Q: A particular fruit’s weights are normally distributed, with a mean of 712 grams and a standard…

A: Given,mean(μ)=712  gramsstandard deviation(σ)=28  grams

Q: A custodian wishes to compare two competing floor waxes to decide which one is best. He believes…

A:

Q: The time needed for college students to complete a certain maze follows a normal distribution with a…

A: t-test: If the given sample size is less than or equal to 30 and sample standard deviation is given.…

Q: The mean number of English courses taken in a two-year time period by male and female college…

A: Given: Sample size of males, n1 = 29 Sample size of females, n2 = 16 Standard deviation for males,…

Q: Suppose that a certain brand of water filter has a mean life of 600 gallons and a standard deviation…

A: Mean = 600 Standard deviation = 53

Q: A sample of 77 subjects went on a low-carbohydrate diet for six months. At the end of that time, the…

A: Given that  Sample size n1=77 , n2=79 Sample means x1=4.7 , x2=2.6 s1=7.16 , s2=5.9