Question

Madeline is skeptical of her friend's claim that Gerald's Café has different level of coffee (in terms of caffeine content) than Sabine's Beans does. So, Shelby takes a random sample of large coffees from both shops, and measures the amount of caffeine content in each coffee. Here is a summary of the results:

(see Pic)

Formulate the hypothesis test (?=0.05) and test if Madeline is right. Write the conclusion of the hypothesis test.

 

Expand

Expert Answer

1 Rating

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Math
Statistics

Hypothesis Testing

Related Statistics Q&A

Find answers to questions asked by students like you.

Q: Suppose administrators at a large school district decide to institute mandatory study halls at their...

A: Click to see the answer

Q: n each part, find the area under the standard normal curve that lies between the specified z-score, ...

A: It is a fact of probability . It is widely used .

Q: Find the z-score, to the nearest hundredth, that satisfies the given condition. 0.206 square unit of...

A: The standard normal variable z follows normal distribution with mean 0 and standard deviation 1.

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no ...

A: Click to see the answer

Q: Find the z-score, to the nearest hundredth, that satisfies the given condition. 0.198 square unit of...

A: P(Z<z)=0.198 square unit z=?

Q: For a one-sample ? test with ?? = 40, find the P-values of the following hypothesis tests.  (a) ?0 :...

A: The p-value can be obtained by using the t-distribution table. (a) The test is two-tailed as the alt...

Q: The living districts of a class of 28 students are recorded in the following table   A B C Numb...

A: Given: The table representing the division of boys and girls is given below   A B C Number of b...

Q: The standard deviation of SAT scores for students at a particular Ivy League college is 250points. T...

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer one question at a ti...

Q: Researchers recruited a sample of 40 female and 40 male heterosexual Caucasian undergraduate student...

A: The sample size is 40, population mean is 18.5, sample mean is 18.85, and sample standard deviation ...

Q: if you roll a pair of fair dice, what is the probability of getting a sum of 1?

A: Roll a pair of fair dice, Sample space = S= (1,1) (1,2) (1,3) (1,4) (1,5) (1,6)(2,1)(2,2)(2,3)(2,4)(...

Q: Do cars get better gas mileage on the highway? The table shows the mileage per gallon of cars on cit...

A: Given, the mileage per gallon of cars on city streets and the mileage per gallon of cars on the high...

Q: To perform a certain type of blood analysis, lab technicians must perform two procedures. The first ...

A: The total number of experimental outcomes exist in this blood analysis using two procedures: Procedu...

Q: I am having trouble with this question please please help!

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case yo...

Q: 1,500 women followed the Atkin’s diet for a month. A random sample of 29 women gained an average of ...

A: From the provided information, Sample size (n) = 29 Sample mean (x̅) = 6.7 Population standard devia...

Q: how you recognize when an inferential statistics problem involves either a confidence interval estim...

A: Click to see the answer

Q: Needed Answer: d. only

A: Click to see the answer

Q: In 2017, the entire fleet of light-duty vehicles sold in the United States by each manufacturer must...

A: Given information- Population mean, µ = 78 mg/mi Population standard deviation, σ = 6 mg/mi We have ...

Q: Assume a member is selected at random from the population represented by the graph. Find the probabi...

A: Here μ = 20.9 and  σ = 5.2 We Know that, Z = X-μσ then, When X= 27,                     Z= 27-20.95....

Q: The standard deviation of SAT scores for students at a particular Ivy League college is 250points. T...

A: Given, σ = 250Margin of Error = 25         To find, a) Find sample ize for raina's 90% confidene int...

Q: Chapter 5 Part A: A university found that 20% of its students withdraw without completing the introd...

A: From the provided information, 20% of its students withdraw without completing the introductory stat...

Q: A simple random sample from a population with a normal distribution of 104 body temperatures has x= ...

A: Click to see the answer

Q: In our Condor Cafe, the Oxnard College Culinary Program offers the most delicious and affortable bre...

A: From parts a and b, p^-ME=0.347........(1)p^+ME=0.578.........(2) Add equation (1) and (2) 2p^=0.347...

Q: Last year a company received 50 complaints concerning carpet installation. The data in the accompany...

A: Solution: n= 50 Sample size ∑xi=2239x=∑xin=223950=44.78 Sample means2=∑(xi-x)2n-1=1704.828   Sample ...

Q: Suppose that the age of students at George Washington Elementary school is uniformly distributed bet...

A: Given: Sample size (n) = 42 Age limits - 5 to 11

Q: An independent random sample is selected from an approximately normal population with an unknown sta...

A: Click to see the answer

Q: we consider the change in the number of days exceeding 90 degrees F from 1948 and 2018 at 197 random...

A: Given: The number of days exceeding 90 degrees F between 1948 and 2018  n=197x¯=2.9 dayss=17.2 daysα...

Q: Average length of stay of a sample of 20 patients discharged from a general hospital was 7 days with...

A: Click to see the answer

Q: A market researcher wants to evaluate car insurance savings at a competing company. Based on past st...

A: Given that, A market researcher wants to evaluate car insurance savings at a competing company. Base...

Q: Does Hypnotism Relieve Pain? The table shows the pain levels of patients before and after hypnotism....

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case yo...

Q: From a box containing four 5-Peso coins and three 10-Peso coins, three coins are selected at randomw...

A: Click to see the answer

Q: Is there a difference between the ages of Actors and Actresses? The table shows the ages of Actors a...

A: The difference between the ages of Actors and Actress when they received first Oscar is, Actor(ye...

Q: You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe t...

A:   The sample size can be calculated as: n=z×σE2 Here, z = desired confidence level E = The all...

Q: The table below shows the scores of a group of students on a 10-point quiz. Test Score Frequency ...

A: Test Score(x) Frequency(f) x*f 3 2 6 4 2 8 5 1 5 6 5 30 7 2 14 8 1 8 9 0 0 10 1 10...

Q: In a recent poll, 290 people were asked if they liked dogs, and 61% said they did. Find the Margin o...

A: Given: Sample size (n) = 290 Sample proportion p^=0.61 Confidence level = 0.90 So, α=1-0.90=0.10

Q: Assume that human body temperatures are normally distributed with a mean of 98.22°F and a standard d...

A: (a) The percentage of normal and healthy persons would be considered to have a fever is P(X>100.6...

Q: At the 5% level of significance, which variables are statistically significant?  If the price of cem...

A:                  At the 5% level of significance, the variables Pc (Price of cement per yard), M (Co...

Q: Country Country Country Construct a 95% confidence interval for the population proportion of adults ...

A: The sample proportion 0.33, and sample size is 1,013. Computation of critical value: 1-α=0.95α=0.05α...

Q: Educational Television In a random sample of 205 people, 143 said that they watched educational tele...

A: Click to see the answer

Q: if you roll a pair of fair dice, what is the probability of getting a sum of 5?

A: Suppose (i,j) represents the outcome i on first die and j outcome on second die. Then,  a sum of 5 c...

Q: A person wants to determine which of two routes to drive has the shorter average driving time. Time ...

A: a) Null Hypothesis: H0: The mean score for A is not less than the mean score for B. Alternative Hypo...

Q: Statistics Question

A: Here it is given that , In a representative study, a sample of n = 100 adolescents with a history of...

Q: The following probability distributions of job satisfaction scores for a sample of information syste...

A: (a)   Obtain the expected value of the job satisfaction score for senior executives.   From the info...

Q: The herb ginkgo biloba is commonly used as a treatment to prevent dementia. In a study of the effect...

A: Obtain the right hand critical value at the 99% confidence interval Here, confidence level is 0.99. ...

Q: Three randomly selected households are surveyed the numbers of people in the household or 14 and 10 ...

A: Given, 1,1 1,4  1,10 4,1 4,10 10,1 10,4 10,10 Median: x¯Md=n+12thobservation

Q: 6.5.2 Q waves on the electrocardiogram, according to Schinkel et al. (A-15), are often considered to...

A: Given, The proportion of region expected, p = 118/202 = 0.584 n = 202 The z score for 90% confidence...

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no ...

A: Obtain the sample size of a no preliminary estimate for p. The formula of sample size is, Use EXCEL...

Q: do the red circle one

A: a) f(x)=2βxe-βx2 for x>0

Q: question 15 I am not understanding how to find the t value and p value

A: Question 15: The test statistic is, t=x¯differenceSEdifference=-21.3493833.59961=-0.635 Thus, the te...