An auto magazine wants to compare the battery range of two highly completive cars. As cars are expensive, each manufacturer gives them 10 cars to test. The first manufacturer has an average battery range of 408 miles with a standard deviation of 10 miles. The second manufacturer has a range of 398 miles with a standard deviation of 40 miles. At the 5% significance level, determine if the first manufacturer has a better battery range than the second. Take the first manufacturer as population 1.

Q: The test statistic is enter your response here.

A:

Q: Aspirin prevents blood from clotting and helps prevent strokes. The Second European Stroke…

A:

Q: A professor wants to determine how the GPAs of his students in his statistics class differ from the…

A: The objective of the question is to identify the appropriate statistical test that the professor…

Q: Describe the differences between a probability sample and a nonprobability sample

A: Introduction: A probability sample involves the use of probabilistic concepts to collect the sample,…

Q: Use the following data to answer the problem below. Subject Ms Chemistry 70 12 Math 28 7 Betty…

A: From the provided information, Subject M s Chemistry 70 12 Math 28 7

Q: When a data set has one or two values that are much higher than all of the others which of our 3…

A: As Mean is found by adding all the values and dividing by the number of values So if one or two…

Q: When the IV and DV are both numeric, which statistical test is most appropriate to use for…

A: Regression analysis is used to estimate the relationship between variables. There will be one…

Q: Does this statement make sense or not? our study measured the birth weights and incidents of…

A: Here we want to Know that the given statement make sense or not.

Q: Write a simple research question that can be answered with an independent samples

A: The Independent samples t-test compares the means of two independent groups in order to determine…

Q: For the data presented below, use SPSS to conduct a Pearson r test to determine if a significant…

A: Introduction:Assume that the data are at least approximately normal.The null and alternate…

Q: Aspirin prevents blood from clotting and helps prevent strokes. The Second European Stroke…

A: It is given that both sample sizes are 200, number of strokes for aspirin alone is 60 and number of…

Q: does question say to bring the sample donw by 1/2 or the mean down by 1/2

A: Given the question want to reduce the margin of error from slightly more than half an hour to…

Q: Which do you think would have more variation: the GPA's of students in an honors college with a…

A: There are two cases: 1. the GPA's of students in an honors college with a prestigious university, 2.…

Q: Would it be unusual for the sample mean to be less than 2 ?

A: Would it be unusual for the sample mean to be less than 2 ?

Q: Three hundred participants were asked to think of colors and write them down. After a 15 minute…

A: The hypothesis test is used for testing a claim which helps in making important business decisions.

Q: Aspirin prevents blood from clotting and helps prevent strokes. The Second European Stroke…

A: Given ,  Aspirin alone :  Sample size = n1 = 200  Number of strokes = x1= 60 Sample proportion = p^1…

Q: In the following situation we want to compare the mean responses in several populations.Are you a…

A: From the provided information, Morning people = 17 Evening people = 35 Number of people who were…

Q: On a nationwide math test, the mean was 72 and the standard deviation was 7. If Roberto scored 90,…

A: Given that, Mean = 72 Standard deviation = 7

Q: Find the test statistic for the problem?

A: It is given that Sample size n = 450 Number of patients had a successful knee surgery operation, X =…

Q: Yessica thought that there was a correlation between the amount of time students slept the evening…

A: From the given information assume that x defines the sleep time the evening before the final exam…

Q: In the following situation we want to compare the mean responses in several populations.Are you a…

A: Given information- Number of groups (K) = 3 Total sample size, (N) = 111   Calculation of the degree…

Q: Which of the following z-score values represents the location farthest from the mean? Question 21…

A: Solution-:Which of the following z-score values represents the location farthest from the mean?(a)…

Q: eights were measured from 35 college students in September and April of th ar.What statistical test…

A: Weights is the continuous quantity and if the population follow normal distribution then the two…

Q: A university administrator obtains a sample of the academic records of past and present students at…

A: Hypothesis testing is an act in statistics whereby an analyst tests an assumption regarding…

Q: The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.25…

A: Given,n=1908x=439p^=xnp^=4391908=0.2301

Q: ppose you are interested in testing whether the mean earning of men in California differs…

A: It is given that n1 is 123 and n2 is 88.

Q: A researcher conducts a study to investigate whether the obesity rate rural communities differ from…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: when you have means from two different samples, it is best to conduct a what test?

A: When there is mean from two different samples, two types of test can be conduced:

Q: A software company is interested in improving customer satisfaction rate from the 55% currently…

A: The following information is provided: The sample size is N=247N = 247, the number of favorable…

Q: Five students took a self-confidence test. Their deviation scores were –4, +3, +1, –2, and +2.…

A: Given ,deviation scores were –4, +3, +1, –2, and +2

Q: Two samples are randomly selected from a population. One sample has n = 5 and the second has n = 30.…

A: In this case, there are two samples. One sample has size of n = 5 and another has size of n = 30.

Q: In a population of 150 pea plants, there are 89 tall-purple plants, 25 short-purple plants, 28…

A: From the given information, Category Observed frequency Proportion Expected frequency=total…

Q: An Excel assignment counts for 0-10 points. The scores in a class of 12 students are recorded as…

A: Use the given data to form the excel table:   Scores x-x x-x2   1 -6 36…

Q: What is the standard deviation for these students' quiz scores

A: Let X denote the score on the quiz. We have to calculate the SD of X.