The average take-out order size for Ashoka Curry House restaurant is shown. Assuming equal variances, at α = 0.05, is there a significant difference in the order sizes?  Customer Order Size (dollars) Statistic Friday Night Saturday Night Mean order size x⎯⎯1x¯1 = 22.32 x⎯⎯2x¯2 = 25.56 Standard deviation s1 = 4.35 s2 = 6.16 Number of orders n1 = 13 n2 = 18   (b) Specify the decision rule. (A negative value should be indicated by a minus sign. Round your answers to 3 decimal places.) Reject the null hypothesis if tcalc >  or tcalc <  . (c) Find the test statistic tcalc. (A negative value should be indicated by a minus sign. Do not round your intermediate values and round your final answer to 4 decimal places.) tcalc           (e-1) Use Excel to find the p-value. (Round your answer to 4 decimal places.) p-value

Q: Do a two-sample test for equality of means assuming unequal variances. Calculate the p-value using…

A: Denote μ1, μ2 as the true average GPA for college juniors and seniors, respectively. The null and…

Q: A group of students (large group) took a test in mathematics and the final scores have a mean of 68…

A: Given information: The final scores in a mathematics test has Normal distribution. Considering the…

Q: or two brands of CD players (assuming the distribution of prices is normal for both orands). The…

A: An F-test for equality of variances is a hypothesis test that is used to assess whether two…

Q: Assume a data set D is observed by three models M₁, M2, and M3 which all follow a normal…

A: We can use Bayesian inference and calculate the posterior probabilities based on the given prior…

Q: Is there a difference in mean daily consumption of coffee between males and females? A random sample…

A:

Q: Assume a researcher recruits 150 African American and Caucasian individuals taking warfarin to…

A: Given: n1 = 75 X1 = 6.1 S1 = 1.7 n2 = 75 X2 = 4.3 S2 = 0.9 Sp = 1.10 Formula Used: Sp =…

Q: Assume that the wavelengths of photosynthetically active radiations (PAR) are uniformly distributed…

A: From the provided information,Wave lengths of photosynthetically active radiations (PAR) are…

Q: For a random sample of 36 data pairs, the sample mean of the differences was 0.72. The sample…

A: The summary of statistics is, Null and the alternative hypothesis: The value of t- test statistic…

Q: Lecture(10.3c): Identify the test statistic used for  the ANOVA procedure  and how it is…

A: We want to tell you which one is the correct choice

Q: Assume thAt scores on a standardized test are known to follow a bell shaped distribution with a mean…

A: L

Q: Data and Two-Way ANOVA Results If appropriate, test for an effect from the row factor. Choose the…

A: The question is about two way ANOVA Given : Test stat of Interaction = 3.35172 Test stat of Row…

Q: If the variance of the Electrical Engineering board examination result is 36, what is the minimum…

A:

Q: Data on the weights​ (lb) of the contents of cans of diet soda versus the contents of cans of the…

A: Given information   Diet Regular n 32 32 Mean 0.79835 lb 0.81004 lb…

Q: Diet Regular Data on the weights (Ib) of the contents of cans of diet soda versus the contents of…

A: a. The test statistic is,…

Q: Using the conf interval...calculate average and standard deviation of the paired differences. Please…

A: The two groups here are stree score at baseline and follow-up.Here difference can be defined asd =…

Q: otal plasma volume is important in determining the required plasma component in blood replacement…

A:

Q: Birth weight at a local hospital for the past year had a normal distribution with a mean of 106…

A: The given information is that, the mean birth weight is 106 ounces and standard deviation is 6…

Q: A sample of final exam scores is normally distributed with a mean equal to 20 and a variance equal…

A:

Q: (b-2) Based on the above data choose the correct decision. O Do not reject the null hypothesis O…

A:

Q: A sample of n=4 has test scores of 0, 0, 12, 12 What is the range, the variance and the standard…

A: Given information- Sample size, n= 4 Given test scores are- 0, 0, 12, 12 We know that- Range =…

Q: Data is collected to compare two different types of batteries. We measure the time to failure of 10…

A: Given that, Mean1, X1 bar= 8.65 Mean2, X2bar=11.23 Variances are equal so standard deviations will…

Q: When calculating an ANOVA, if the research hypothesis is in fact true, then. variance due to group…

A:

Q: A random sample of 84 products is selected and sample mean and standart deviation are found to be…

A: We have to find level of confidence.

Q: A marketing study was conducted to compare the variation in the age of male and female purchasers of…

A: According to the given information, we have Female: Sample size = 31Sample mean = 50.30Sample…

Q: You are testing the claim that having lights on at night increases weight gain (abstract). A sample…

A: Let μ1 denotes the population mean of x1, and μ2 denotes the population mean of x2. The clam of the…

Q: Calculate the z-score for sample means (single-sample z-test) using this data set. You can assume…

A: Mean = 10 Standard deviation = 5

Q: Suppose that house prices in a city (measured in thousands of dollars) are normally distributed with…

A: It is required to find the z-score for a house price of 333 units.

Q: Suppose the number of off springs a female eagle raises during its lifetime has a distribution with…

A: Given information: µ=18 σ2=4 n=45 The total number of off-springs produced by the eagles can be…

Q: A researcher randomly sampled 100 graduates of an MBA program and recorded data concerning their…

A: From the provided information, n1=50x1=85500s1=10000n2=50x2=78000s2=8000α=0.05

Q: In the past Grades (G) of the police academy entrance exams in NYC was distributed normal with mean…

A: Claim:Test whether this data comes from a normal distribution with mean 66.5 and variance of 100 or…

Q: A certain type of thread is manufactured with a mean tensile strength of 71.8 kilograms and a…

A: Solution  Given That , A certain type of thread is manufactured with a mean tensile strength of 71.8…

Q: Highway engineers in Ohio are painting white stripes on a highway. The stripes are supposed to be…

A: Null Hypothesis: A hypothesis which is tested for plausible rejection is called the Null Hypothesis…

Q: Diet Data on the weights (Ib) of the contents of cans of diet soda versus the contents of cans of…

A: Given: Data on the weights of contents of cans of diet soda and the content of cans of the regular…

Q: Lecture(10.3): Identify the test statistic used for the ANOVA procedure and how it is…

A: Identify the test statistic used for  the ANOVA procedure  and how it is calculated.

Q: What conditions are necessary in order to use the dependent samples t​-test for the mean of the…

A: Necessary conditions for dependent samples in t-test, and for the difference in the means of two…

Q: An ecologist is studying the impact of local polluted waters on the growth of alligators. The length…

A: Length of adult male alligators follows a normal distribution with µ and standard deviation 2. n…

Q: The test statistic is:

A: Given : n=25 , X-bar=3.56  , s2=11.77 , μ0=1.63  We want to find the value of the test statistic.

Q: A coffee-dispensing machine is supposed to deliver 8 ounces of liquid into each paper cup, but a…

A: Claim:The actual mean amount of coffee-dispensing machine is less than 8. Null hypothesis:H0 : μ…

Q: Birth weight at a local hospital for the past year had a normal distribution with a mean of 106…

A: Given information- Mean, μ = 106 ounces Variance, σ2 = 36 So, standard deviation, σ = 6 Middle, c =…

Q: Suppose the number of off springs a female eagle raises during its lifetime has a distribution with…

A: Let X denote the number of off springs a female eagle raises during its lifetime. Given that X…

Q: Do a two-sample test for equality of means assuming unequal variances. Calculate the p-value using…

A:

Q: An engineer designed a valve that will regulate water pressure on an automobile engine. The engineer…

A: