The average mpg usage for a 2017 Toyota Prius for a sample of 7 tanks of gas was 43.5 with a standard deviation of 1.8. For a 2017 Ford Fusion, the average mpg usage for a sample of 7 tanks of gas was 39.9 with a standard deviation of 2.0.   Assuming equal variances, at α = .05, is the true mean mpg lower for the Ford Fusion?   (a-2) Calculate the tcalc. (Round your answer to 4 decimal places.)   tcalc  ____________    (b) Calculate the p-value using Excel. (Round your answer to 4 decimal places.)   p-value  ___________

Q: An article presents the results of a study in which the weights of 295 eggs from 27 week-old…

A:

Q: Glpha Value = 0s A standard deviation of fuel consumption of a certain automobile is hypothesized to…

A: From the provided information, Sample size (n) = 20 Level of significance (α) = 0.05 Sample standard…

Q: Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2700 grams and…

A: Suppose that the random variable x defines the weight of babies.

Q: A marine biologist claims that the mean length of mature female pink seaperch is different in fall…

A: we have given that  n1=10 ,n2=2 ,xbar1=111,xbar2=105,and s1=12 ,s2=14 Note : according to bartleby…

Q: It takes an average of 10.3 minutes for blood to begin clotting after an injury. An EMT wants to…

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

Q: Have American males (AMs) gotten heavier over the last 20 years? A random sample 77 AMs in 2019 had…

A: Central Limit Theorem for mean: If a random sample of size n is taken from a population having mean…

Q: A manufacturer claims that their calculators are 6.800 inches long. A random sample of 39 of their…

A: Null hypothesis:µ=6.8.Alternative hypothesis:µ≠6.8This is a two tailed test.Since the population…

Q: A manufacturer claims that the calling range (in feet) of its 900-MHz cordless telephone is greater…

A: From the provided information,

Q: Based on this, we should      the null hypothesis. Thus, the final conclusion is that ... The data…

A: Given data : sample size, n =69 sample mean, x̄ = 12.4 sample standard…

Q: Many people believe that the average number of Facebook friends is 130. The population standard…

A: GivenMean(x)=140standard deviation(σ)=32sample size(n)=50α=0.01

Q: For this study, we should use The null and alternative hypotheses would be: H0:H0:…

A:

Q: Suppose babies born after a gestation period of 32 to 35 weeks have the mean weight of 2800 grams…

A: To determine which baby weights are more relative to the gestation period, for that it is needed to…

Q: Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2600 grams and…

A: We have given thatfor 32 to 35 weeks Mean()= 2600standard deviation() =600andfor 40 weeks mean()=…

Q: It takes an average of 12.8 minutes for blood to begin clotting after an injury.  An EMT wants to…

A: We want to find the p value

Q: The math test scores of 16 students from one high school showed a mean of 107, with a standard…

A: There are two independent samples which are high school 1 and high school 2. We have to test whether…

Q: A manufacturer of light bulbs claims that his light bulbs have a mean life of 1150 or more hours.…

A: Null hypothesis: µ=1150. Alternative hypothesis: µ≠1150. Here, the sample mean, is 1137. Population…

Q: marine biologist claims that the mean length of mature female pink seaperch is different in fall and…

A: (a) The claim is  that the mean length of mature female pink seaperch is different in fall and…

Q: A standardized test is given to a sixth grade class. Historically the mean score has been 143 with a…

A: Suppose σ is the population standard deviation of the performance scores.

Q: ck music that is continuously playing compared to being ar classical music? The 54 seeds that were…

A: Given The 54 seeds that were exposed to rock music took an average of 30 days to germinate. The…

Q: a. For this study, we should use Select an answer b. The null and alternative hypotheses would be:…

A: We want to find null hypothesis,  alternate hypothesis and  test statistics. Note: According to…

Q: A researcher claims that the average wind speed in Ras Al Khaimah is 8 miles per hour. A sample of…

A: One sample t test:

Q: A fast food restaurant estimates that the mean sodium content in one of its breakfast sandwiches is…

A: Solution: Given information: n= 42 Sample size  x=915 Sample mean μ=923 Population mean σ=24…

Q: A survey taken several years ago found that the average time a person spent reading the local daily…

A: Introduction: Denote μ as the true mean time that a person spends reading the local newspaper in the…

Q: A researcher at Central Hartford University is testing out a new super long-lasting chewing gum.  He…

A:

Q: It takes an average of 14.8 minutes for blood to begin clotting after an injury.  An EMT wants to…

A: Define X: random variable for the no. of minutes for the blood to begin clotting after an injury…

Q: begin clotting after an injury.  An EMT wants to see if the average will decline if the patient is…

A:

Q: A marine biologist claims that the mean length of mature female pink seaperch is different in fall…

A: Given data is appropriate for testing of hypothesis to test t-test for difference of means because…

Q: One study revealed that a child under the age of 10 watches television 4.5 hours per day. A group of…

A: The null and alternative hypothesis is given by; H0: μ=4.5ag.Ha: μ<4.5The given level of…

Q: Assume that the data come from normal populations with unequal variances. Round your answers to…

A: It is given that the data of two samples. •). For night students: Sample mean = 2.86 Sample standard…

Q: was 10 days. The 44 seeds that were exposed to classical music took an average of 30 days to…

A: Given Data : For Sample 1 x̄1 = 26.0 s1 = 10.0 n1 = 50 For Sample 2…

Q: A manufacturer claims that the mean lifetime of its fluorescent bulbs is 1000 hours. A homeowner…

A: Let Xi : Lifetime of ith bulb, i = 1(1)n.Step 1:- Construction of test statistic,Xi ~ N(u,σ2), i =…

Q: Have American males (AMs) gotten heavier over the last 20 years? A random sample 77 AMs in 2019 had…

A: g) First sample (2019): x1-bar = 189.030, (s1)2 = 14.04, n1 = 77. Second sample (1999): x2-bar =…

Q: A psychologist is studying smokers' self-images, which she measures by the self-image (SI) score…

A: From the provided information, Sample size (n) = 15 Sample mean (x̅) = 126 Sample standard deviation…

Q: The mean measured verbal IQ (IQV) score of a random sample of 20 children was 86.9 with a standard…

A:

Q: In a random sample of 7 cell phones, the mean full retail price was $548.40 and the standard…

A:

Q: 1. In the past, a chemical company produced 880 pounds of a certain type of plastic per day. Now,…

A: Given that  Sample size n =50 Sample mean =871 Standard deviation =21 Population mean μ =880

Q: In a region, the correlation coefficient between corn yield and peanut yield (planted in the same…

A: Solution: Given information. The independent variable is peanut yield  (x)  The depedent variable is…

Q: A company that makes cola drinks states that the mean caffeine content per​ 12-ounce bottle of cola…

A: (a)

Q: It takes an average of 9.8 minutes for blood to begin clotting after an injury.  An EMT wants to see…

A: Given: μ0=9.8n=52x¯=10.7s=1.98α=0.05

Q: A survey taken several years ago found that the average time a person spent reading the local daily…

A: Null hypothesis: Null hypothesis is the statement about parameter of population. Alternative…