An ice cream company owns two plants, namely A and B, and wants to test using a 5% significance level whether there is a difference in the production activities carried out in each plant in terms of mean kilos of ice cream produced per hour. Using a random sample of 35 paired observations, the sample means are 60 kilos for plant A and 75 kilos per hour for plant B. In which of the following scenarios can you reject the null hypothesis? a the sample standard deviation of the difference is 55 b the sample standard deviation of the difference is 75 c the sample standard deviation of the difference is 20 d the sample standard deviation of the difference is 45 e the sample standard deviation of the difference is 100

Q: Were the two laboratories measuring the same thing? (Assume normality and common variance.) Be sure…

A:

Q: What are four main functions of statistics?

A: Find: The four main functions of statistics.

Q: mean score for the most recent applicants is lower than 70. He randomly samples the scores of 10…

A:

Q: A statistics professor takes a random sample of 25 students who have taken a special statistics…

A: From the provided information, Sample size (n) = 25 Sample average (x̄) = 86 Sample standard…

Q: Consider the following set of samples obtained from two normally distributed populations whose…

A: First calculate mean and standard deviation of both samples .  For sample 1 : The sample size is…

Q: A test concerning economic literacy was administered to two groups, on consisting of college…

A: Given data: College graduates: n1=75x¯1=77.5s1=6.2 High school graduates: n2=75x¯2=50.4s2=9.4 Level…

Q: n a random sample of​ males, it was found that 25 write with their left hands and 219 do not. In a…

A: given data, male:25-write with left hands219- do not 244-   total malex= no. of left…

Q: An article in the San Jose Mercury News stated that students in the California state university…

A: We have given the following information.  Hypothesized population mean = 4.5 Sample mean =5.1 Sample…

Q: (DEPENDANT ON or INDEPENDANT OF?) the age of the person taking the pill. (CLAIM OR NOT CLAIM?) 2.…

A:

Q: The following is sample information. We are asked to test the hypothesis at the 5% significance…

A:

Q: Assume two populations, one of size 15 and variance 12 and the other one of size 10 and variance…

A: Given, n1=15, n2=10, σ12=12, σ22=7.6 The combined standard deviation is given by,…

Q: A special academic program for skilled students conduct an admission exam to select their new…

A: Given  Mean score=66 Sample size=n=18 Sample mean=X_bar=62 Sample standard deviation=s=8.7 Level of…

Q: A computer information systems manager is debating which of two similarly priced laptop battery…

A:

Q: we are interested in how much time young adults spend on social media. in one statistical study . we…

A: Given: In the statistical study, the researcher wants to know how much time young adults spend on…

Q: A test concerning economic literacy was administered to two groups, on consisting of college…

A: From the given information, College graduates: N1=75, X1¯ =77.5 and s1=6.2 High School graduates:…

Q: calculate a 99% confidence interval for the difference in the average functioning time of the two…

A: HERE AS PER POLICY I HAVE CALCULATED FIRST MAIN QUESTION Based on two independent random samples,…

Q: A car leasing firm's records indicate that the mean number of miles driven annually in its cars has…

A: GivenA car leasing firm's records indicate that the mean number of miles driven annually in its cars…

Q: According to a technician's study, male coworkers had 11.4 hours per month of overtime last year, on…

A: Given that, μ = 11.4x = 10.7s= 1.5 n = 15 H0: μ = 11.4   Vs   Ha: μ ≠ 11.4 which is two tailed test.…

Q: Determine the decision rule for rejecting the null hypothesis H0H0. Round the numerical portion of…

A: Given that  Sample sizes n1=70      , n2=85       Sample means X̄1=8.84     , X̄2=9.05      ?1 =0.30…

Q: Which of the following tests will reject the null hypothesis that the two samples come from…

A: It is given that:  For sample-1: x¯1=50, s1=10, n1=20. For sample-2: x¯2=60, s2=15, n2=25

Q: ket analyst believes that the average price of two securities (Stock A and Stock B) are equal. The…

A: As the population standard deviation is not known, we will use a t-test. The null and alternative…

Q: A sample of 20 from a population produced a mean of 66.0 and a standard deviation of 10.0. A sample…

A: The sample of size n1=20 has a mean x¯1=66.0 and standard deviation s1=10.0. The sample of size…

Q: Using traditional methods it takes 8.2 hours to receive a basic flying license. A new license…

A: The null and the alternative hypotheses are given below:

Q: n engineer asserts that Battery A outperforms Battery B in terms of overall performance. Type A and…

A:

Q: A medical researcher administers a new medication to a random sample of 70 flu sufferers, and she…

A: From the provided information, The degree of freedom = n1 + n2 – 2 = 70 + 50 – 2 = 118 As, the…

Q: 5. Suppose a tire company developed two new brands of tires and would like to compare the…

A: Suppose a tire company developed two new brands of tires and would like to compare the variability…

Q: A consumer-research company selects several models of cars each year to study fuel efficiency. This…

A: Option c is correct

Q: NOTE: If you are using a Student's t-distribution for the problem, including for paired data, you…

A: Let X1 be the random variable such that an average weight loss due to a power diet. x¯1 : The sample…

Q: We are interested in comparing the average study hours for economic majors at USC and UCLA. We drew…

A: As per guidelines we will solve first question only, please repost other questions for more answers.…

Q: 5. Suppose a tire company developed two new brands of tires and would like to compare the…

A: sample size 1 ,n1 = 30 Degree of freedom 1,df1= 29 sample variance 1,s1= 3700.0…

Q: A data set includes weights of garbage discarded in one week from 62 different households. The…

A: Correlation coefficient (r) is a measure of association or relationship between two variables. The r…

Q: Suppose a tire company developed two new brands of tires and would like to compare the variability…

A: a. The variance of mile covers by tire of Brand 1 is σ12 and the variance of mile covers by tire of…

Q: Independent random samples were selected from population 1 and population 2. The following…

A: Use the independent two sample t test

Q: You are interested in testing whether the average age of household heads is higher in the suburbs…

A: Given: For sample 1 (the household heads): Sample size (n1)=45Sample mean(x¯1)=44Standard deviation…

Q: Using traditional methods it takes 8.2hours to receive a basic flying license. A new license…

A: Null hypothesis:µ=8.2.Alternative hypothesis:µ<8.2.This is a left tailed test.Since the…

Q: out the respective averages and standard deviations, and he only remembers the latter, 0.7 and 0.86…

A: Faculty A B Population Parameters Mean 0.7 Standard Deviation 0.86 Null Hypothesis:…

Q: A test designed to measure mothers' attitudes toward their labor and delivery experiences was given…

A:

Q: A large international company with over 1.5 million employees wants to estimate how many of their…

A: Disclaimer: Since you have asked multiple questions, we will solve the first question for you. If…

Q: I need help on this practice problem

A: a. 0.0465b. we reject the null hypothesisc. the assumption for the validity of this result isThe…

Q: You have an independent-measures study where your first sample has an s² = 9 and your second sample…

A: Given : S12 = 9 S22 = 6

Q: a. Which hypothesis testing method can be used to compare the mean size of the two populations?…

A: The provided sample means are shown below: Xˉ1=10\bar X_1 = 10 Xˉ2=12\bar X_2 = 12 Also, the…

Q: According to a research study, college students spent 24.2 hours doing homework per week last year,…

A: According to a research study, college students spent 24.2 hours doing homework per week last year,…