a consumer research group is interested in testing an automobile manufacturer’s claimthat a new economy model will travel at least 25 miles per gallon of gasoline (h0: m $ 25).a. with a .02 level of significance and a sample of 30 cars, what is the rejection rule basedon the value of x for the test to determine whether the manufacturer’s claim should berejected? assume that s is 3 miles per gallon.b. what is the probability of committing a type ii error if the actual mileage is 23 milesper gallon?

Q: Ms. Berry is concerned about the average amount of food Fred, the elephant, eats each day. Zookeeper…

A:

Q: Researchers in education are performing a study to see if listening to soothing music while taking a…

A: The population mean is 79. We have to test whether listening to soothing music while taking a…

Q: Why are the formulas and procedure for the paired samples t-test different from those of the…

A: Option a, "to account for lack of balance in the design," is not correct because the paired samples…

Q: uppose we are testing Ho: p=.20 vs Ha: p does not equal .20 and TS=2.34. What is the p-value?

A: given data  Ho : p = 0.20 Ha:p≠0.20 test statistic Z = 2.34 p value = ?

Q: A study by Hershey's indicated that Americans consumed an average of 12.4 pounds of chocolate per…

A: Given that  X~N( μ = 12.4 , ? = 3.9) μ = 12.4 , ? = 3.9 Z-score =( x - μ )/?

Q: According to a survey conducted by the Association for Dressing and Sauces, 85% of American adults…

A: H1  = Alternative hypothesis

Q: Perform a hypothesis test to test whether there is a difference in the average price. Use a = 0.05

A: Let μ1 and μ2 are the average prices of couches at two different stores. Given that,…

Q: Costs for standard veterinary services at a local animal hospital follow a Normal distribution with…

A: GIVEN DATA normal distributionμ = 89σ = 23P(45<x<132) = ?

Q: d. The p-value = 0.4238 x (Please show your answer to 4 decimal places.) e. The p-value is sa f.…

A: GIVEN DATA, claim:p>0.56x=170n=278p^=xn=170278=0.6115here we have to find out the p-value for the…

Q: The weekly demand for Baked Lay’s potato chips at a certain Subway sandwich shop is a random…

A: Here the given information is        The weekly demand for Baked Lay’s potato chips at a certain…

Q: he average price of a home in your community is $200,000 with a standard deviation of $30,240…

A:

Q: A sample of n=30 college sophomores was drawn to assess the number of times per day they open some…

A: Obtain the Z-score for the random variable M equals 40 The Z-score for the random variable M equals…

Q: For an error level of 5% in a two-way test of a sample with 15 freedom in the Student t…

A: From the given information, α = 0.05, df = 15 and it is a two-tailed test.

Q: A researcher wanted to determine if carpeted rooms contain more bacteria than uncarpeted rooms. The…

A: Given :

Q: mally distributed with a mean of $2.39 and a standard deviation of $0.15. 1. What is the…

A: Given: Population mean μ=2.39 Population standard deviation σ=0.15 Let X ~ N (2.39, 0.152)

Q: Blood glucose levels are normally distributed with a mean of 85 mg/dl and a standard deviation of 25…

A: Answer: Given that:   ‘x’ is Normally distributed with                 Mean  µ =85       standard…

Q: random sample of 20 young men was taken. One half of the group was given coffee containing caffeine…

A: Given n1=12 n2=8 S1-SQUARE=31.11 S2-square=28.67

Q: The World Health Organization's (W.H.O.) recommended daily minimum of calories is 2600 per…

A: given data  W.H.O. minimum calories = 2600 μ = 2460σ = 500n = 49P(x¯ >2600) = ?

Q: Provide an appropriate response. 21) One year, professional sports players salaries averaged $1.9…

A:

Q: 5. Did the movie "Jaws" scare you out of the water or the movie "Psycho" change your shower habits?…

A: sample size(n)=150No.of students said they still experience "residual anxiety" from ascary movie or…

Q: According to the American Red Cross, 9.3% of all Connecticut residents have Type B blood. A random…

A: The Standard deviation of the random variable X is given by

Q: A survey claims that 9 out of 10 doctors (i.e., 90%) recommend brand Z for their patients who have…

A:

Q: The annual per capita consumption of bottled water was 30.5 gallons. Assume that the per capita…

A: We have given that.   X~N( μ , ?^2 )   μ =30.5 , ? =13   Z-score =( x - μ )/?   NOTE:- According to…

Q: a. Let the random variable ? be the number of chips per biscuit. Identify the distribution of ? and…

A: As per our guidelines, we are allowed to answer three sub-parts Here it is given : a) The mean…

Q: Is the proportion of teenagers with Back pain the same as those without back pain? A random sample…

A: We have to perform test for proportion.

Q: According to a 2015 article, 37% of Americans aged 25 years or older have been arrested. An Orange…

A: Given that sample size n = 120 Number of persons who have been arrested, X = 48 Level of…

Q: fitness magazine advertises that the mean monthly cost of joining a halth club is $25. you want to…

A: The hypothesis to test the claim that the mean monthly cost of joining a halth club is $25 or not…

Q: A publisher reports that 46% of their readers own a Jaguar. A marketing executive wants to test the…

A: Given,   Sample size = 220 Sample proportion = 0.50   The null and alternative hypothesis is:

Q: A medical school claims that more than 28% of its students plan to go into general practice. It is…

A:

Q: The annual per capita consumption of bottled water was 33.5 gallons. Assume that the per capita…

A: "Since you have posted a question with multiple subparts we will provide solutions only to the first…

Q: 国 The annual per capita consumption of bottled water was 30.5 gallons. Assume that the per capita…

A: Given Data : Population Mean,μ = 30.5 Population Standard Deviation,σ = 13

Q: A recent study found that 27% of adults often purchase used items istead of new ones. Assume a…

A: Given information Probability that the adults often purchase used items instead of old ones = 0.27…

Q: A researcher measured how far 100 students from York (mean = 30 kilometers, SD = 5.2 kilometers) and…

A:

Q: Investigators are trying to determine if the contamination of a town well led to significant…

A: Given Information: Before shut down of contaminated well: There were x1=16 birth defects among…

Q: A researcher wants to know whether athletic women are more flexible than non - athletic women. For…

A:

Q: Keith wonders if pet groomers in his area charge, on average, less than $50, the national average.…

A: Here the given information is       Keith wonders if pet groomers in his area charge, on average,…

Q: Stephen has developed a diagnostic tool that predict the probability of having the eye disease. He…

A: Given Data :

Q: When a sample contains 100 or more cases, what is the correct probability distribution to use?

A: Given: When a sample contains 100 or more cases, what is the correct probability distribution to…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.