Company A has implemented new technologies to decrease the manufacturing cost of products. The old cost was $5.6 per unit. In order to find out whether the new technologies are effective or not, we decided to perform a hypothesis test at the significance level of 0.05. We collected a sample of 36 products and found the average cost is $5.5, and the sample standard deviation of the cost is $1.2. Please first choose the correct set of hypotheses and then choose the correct test statistics. HO: mean > 5.6 H1: mean <= 5.6 HO: mean = 5.6 H1: mean 5.6 HO: mean <= 5.6 H1: mean > 5.6 HO: mean > 5.6 H1: mean < 5.6 HO: mean < 5.6 H1: mean >=5.6 HO: mean 5.6 H1: mean - 5.6

Q: a) Persons who visit the restroom of a certain fast-food outlet were asked to state their opinion of...

A: Given : Claim : There is an association between the gender of persons and their opinion.

Q: Identify the data set's level of measurement. temperatures of 48 selected refrigerators O A. ratio O...

A: The temperatures of refrigerators are recorded in degrees Fahrenheit.

Q: Use a t-distribution and the given matched pair sample results to complete the test of the given hyp...

A: t-Test: Paired Two Sample for Means

Q: In this question, we investigate the relationship between the top (maximum) speed (mph) and maximum ...

A: The independent variable is Maximum Height. The dependent variable is Top Speed. We have to construc...

Q: The average salary of 81 random employees in a certain financial sector was 3400 USD. From past info...

A: GivenMean(x)=3400standard deviation(σ)=270sample size(n)=81confidence interval(c)=80%

Q: | | V * 00 Construct the indicated confidence interval for the population mean u using the t-distrib...

A:

Q: Given the two random variables X ~ Uniform(0, 1) and Y ~ Uniform(0, 1), with X LY, find the joint pr...

A: # random variable x and y follow uniform (0,1) let v=x^2 and v=xy then to find joint probability dis...

Q: Bivariate data for the guantitative variables x and y are given in the table below. These data are p...

A: Solution: The given data for X and Y is

Q: Assume the change is exponential and complete the table below. Radioactive iodine is used to determi...

A:

Q: In a survey of South African drivers, 79% of women drivers and 85% of men drivers said that they exc...

A:

Q: A machine is set to produce disc plates with a mean diameter of 14 mm. A sample of 8 discs gave a me...

A: i) The hypothesized mean is 14 mm.

Q: In a university where calculus is a prerequisite for the statistics course, a sample of students was...

A: Given: Calculus Statistics 62 83 67 72 92 87 84 78 87 79 84 79 75 85 55 60

Q: Bivariate data for the guantitative variables x and y are given in the table below. These data are p...

A: Solution: The given data for X and Y is

Q: 5. Let X and Y be random variables such that var(X)=16, var(Y) = 9, and p = cor(X,Y) = -0.5. %3D a. ...

A:

Q: d) Calculate the test statistic. e) State the conclusion.

A:

Q: Two different simple random samples are drawn from two different populations. The first sample consi...

A: From the provided information,

Q: for a confidence level of 95% with a sample size of 22% find the critical t-valu

A: Given that,sample size = n = 22  Degrees of freedom = df=n-1=22-1=21 

Q: Assume a normally distributed set of test scores with a mean of ? = 100 and a standard deviation of ...

A: Given: Mean = 100 Standard deviation = 18  

Q: The average salary of 81 random employees in a certain financial sector was 3400 USD. The sample sta...

A:

Q: A Gallup poll wants to determine the mean number of books Americans read each year. How many subject...

A:

Q: 10. Is there a significant difference in e-mail hours per week among the same educational groups? Us...

A: The level of significance is 0.05.

Q: When women were finally allowed to become pilots of fighter jets, engineers needed to redesign the e...

A: Let X be the weights of women which follows normal distribution with mean 165 lb and a standard devi...

Q: In a certain country, 47 percent of the population are on a strict diet. In a sample of 20 individua...

A: Let p be the probability that an individual is on a strict diet. Given that p = 47% = 0.47 Let X den...

Q: a) Explain the differences between qualitative and quantitative forecasting techniques with examples...

A: a. Qualitative forecasting techniques: This is the kind of the forecasting which does not use data i...

Q: In a recent poll, 240 people were asked if they liked dogs, and 69% said they did. Find the margin o...

A: Given,sample size(n)=240sample proportion(p^)=0.69α=1-0.90=0.1α2=0.05Z0.05=1.645    (from Z-table)

Q: Find a confidence interval for μ or p. In the year 2000, a survey of 1083 U.S. adults were asked wh...

A: Confidence interval is calculated using the values sample statistic and the margin of error. Margin ...

Q: Dr.Blume has trained observers to use frequency recording to record the behavior of 12 schizophrenic...

A: K = 0.47

Q: Determine the number of outcomes in the event. Decide whether the event is a simple event or not. A ...

A: GivenA computer is used to select randomly a number between 1 and 9sample space={1,2,3,4,5,6,7,8,9}L...

Q: 11 LL Complete parts (a) and (b) below. The number of dogs per household in a small town 11 Probabil...

A: Given data: To calculate: 1. Mean 2. Standard deviation

Q: Use the values on the number line to find the sampling error. x=49 u=5.45 44 4.8 52 5.4 56 5.8 4.2 4...

A:

Q: 2. V * 00 IM Next question Ps To test the effectiveness of a new drug that is Construct a 90% confid...

A: Solution To find the confidence interval we will use Excel

Q: A university employment office wants to compare the time taken by graduates with three different maj...

A: Let a treatment A be classified into k levels then, to test the equality of k levels means, we will ...

Q: birth weights (in pounds), x, and the lengths (in inches), y, for a set of newborn babies at a local...

A: NOTE:The data set is as follows; Birth Weight (in Pounds), x-12,10,88,11,11,33,55,44,77,66          ...

Q: A university employment office wants to compare the time taken by graduates with three different maj...

A: Given, A university employment office wants to compare the time taken by graduates with three differ...

Q: For the first set of questions, you will need to calculate the standard error for the sampling distr...

A: Formula :  

Q: REQUIREMENTS: 1. Determine what type of non-parametric test to use in the following problems. 2. Pro...

A: Given information: Student Pre-module score Post-module score 1 18 22 2 21 25 3 16 17 4 2...

Q: a. Determine the correlation coefficient r between the two variables. Answer in exact fraction, or r...

A: Let X denote the number of times shared, And Y denotes the count of likes on Facebook

Q: Answer all parts

A: Given : n = 26 s2 = 4.41 c = 0.95

Q: Assume you have noted the following prices for books and the number of pages that each book contains...

A: 1 The regression output for the given dataset, as obtained in excel, is as follows:   Coefficient...

Q: We have conducted a one sided hypothesis test with a significance level α = 0.02. We would like to a...

A: Given data we have conducted a one sided hypothesis test with a significance level α=0.02  

Q: 8 15 7 1 Y 10 21 28 ale prefer chocolate box? t least 4 decimal places flower pots, what proportion ...

A: *answer: 

Q: In a certain country, 47 percent of the population are on a strict diet. In a sample of 20 individua...

A:

Q: The amount of time spent commuting one-way to university by students follows a normal distribution w...

A:

Q: The monthly utility bill in a city are normally distributed , with a mean of $100 and a standard dev...

A:

Q: When the P - value is equal to the alpha level, the null hypothesis should be accepted.

A: P-value is the probability value which is derived from test statistic and it is useful to decide whe...

Q: 19) You run cross validation using the Caret package and get the following output. model log$results...

A: 19) Given cross validation output, From the given output, the accuracy indicates the average accura...

Q: The following histograms each represent binomial distributions. Each distribution has the same numbe...

A: The given histograms each represent binomial distributions. Each distribution has the same number of...

Q: Only about 18% of all people can wiggle their ears. Is this percent lower for millionaires? Of the 3...

A: Givenn=326x=49α=0.01p^=xn=49326=0.1503

Q: Let represent the percentage of all students who received a grade of B given they were male. Use a 9...

A:

Q: In an upper tail test about the population mean, where the population standard deviation is unknown,...

A: