In order to determine whether or not there is a significant difference between the mean hourly wages paid by two companies (of the same industry), the following data have been accumulated.                                                              Company A            Company B sample size                                                       80                       60 Sample Mean                                                   $16.75                $16.25 Population Standard Deviation                        $1.00                       $.95 a. A Point estimation for the difference between the two population means is b. The test statistics is c. At the 5% level of significance, the null hypothesis should

Question

In order to determine whether or not there is a significant difference between the mean hourly wages paid by two companies (of the same industry), the following data have been accumulated.

                                                             Company A            Company B
sample size                                                       80                       60
Sample Mean                                                   $16.75                $16.25
Population Standard Deviation                        $1.00                       $.95

a. A Point estimation for the difference between the two population means is

b. The test statistics is

c. At the 5% level of significance, the null hypothesis should

Expert Answer

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

Data

Hypothesis Testing

Measures

Other

Related Statistics Q&A

Find answers to questions asked by students like you.

Q: A fair coin flipped 3 times in a row.Find the probably of the coin coming up tails at least twice

A: When 3 coins are tossed the sample space is   S={HHH, HHT, HTH, HTT, THH, THT, TTH, TTT}   Let E be ...

Q: The internal auditing staff of a local manufacturing company performs a sample audit each quarter to...

A: Click to see the answer

Q: If X1 and X2 are independent random variables havingexponential densities with the parameters θ1 and...

A: Given: Using the above information, we can say:

Q: Answer true or false to each of the following statements and explain your answers. a. In a two-way A...

A: a. Interaction effect: The interaction effect between factor A and B means that the effect of one fa...

Q: (Yi, X1i, X2i) satisfy the assumptions of the attachment in addition,var(ui | X1i, X2i) = 4 and var(...

A: Given, Regression Model

Q: Do you tailgate the car in front of you? About 30% of all drivers will tailgate before passing, thin...

A: Given information is as follows; Let  " r "  represent the a driver will tailgate the car in front o...

Q: Illustrate the two types of quasi-experiments by following examples? Example #1: Labor market effect...

A: Quasi experiment are the experimental design which involves manipulation of independent variable wit...

Q: Recently, a university surveyed recent graduates of the english department for their starting salari...

A: Click to see the answer

Q: Exercise5:The annual salaries of employees in a large company are approximately normally distributed...

A: Note: Hi there! Thank you for posting the question. As your question has more than 3 parts, (sub-par...

Q: A fan of country music plans to make a custom CD with 14 of her 26 favorite songs. How many differen...

A: Click to see the answer

Q: What is the purpose of a hypothesis test?

A: Hypothesis: Hypothesis is an assumption about the parameter of the population which will be made on ...

Q: a. Find the quartiles. b. Find the interquartile range. c. Identify any outliers. 646457555565565954...

A: Sort the data in ascending order: 54, 55, 55, 56, 56, 57, 59, 60, 61, 62, 62, 64, 64, 65, 79. When ...

Q: Events A and B are independent. Find the indicated Probability.P(A) = 0.99P(B) =    (round answer to...

A: If two events A and B are independent, then P(A and B) = P(A)P(B).

Q: (Ch. 1) The melting point (in degrees Celsius) of 12 specimens of a certain type of plastic was reco...

A: Sample range = Maximum-Minimum From the given data, the maximum value is 182.4 & the minimum val...

Q: A financial manager made two new investments—one in the oil industry and one in municipalbonds. Afte...

A: The manager made two investments-one in oil industry and one in municipal bonds. Each investment fur...

Q: Snow After an unusually dry autumn, a radio announceris heard to say, “Watch out! We’ll pay for thes...

A: Click to see the answer

Q: Scientists and Engineers. The U.S. National Science Foundation collects data on science and engineer...

A: The percentage of S&E degrees awarded were for Bachelor’s degrees is 75.2% and the percentage of...

Q: The distribution function of the random variable X isgiven byF(x) = 1 − (1 + x)e−x for x > 00 for...

A: The required probabilities are as follows:

Q: A deck of cards contains RED cards numbered 1,2,3,4,5,6 and BLUE cards numbered 1,2,3. Let R be the ...

A: Click to see the answer

Q: Describe what does a mean square in the numerator reflects.

A: In ANOVA, “SS” stands for “sum of squares”, “df” stands for degrees of freedom, F is for the test st...

Q: How does an observed sample mean qualify as a common outcome?

A: Click to see the answer

Q: 1. Measures of location - Percentiles, deciles, and quartiles A growth chart is a plot of the pe...

A: We have been given data on weights for the sample of 12 baby girls at the age of 16 months. Baby ...

Q: The owner of a company has recently decided to raise the salary of one employee, who was already mak...

A: GIVEN , The owner of a company has recently decided to raise the salary of one employee, who was alr...

Q: Suppose that A and B are events such that P(A) = 1/3, P(A or B) = 1/2, and P(A&B) = 1/10. a. Are...

A: Mutually Exclusive Events: Two events are said to be mutually exclusive if they cannot occur at the ...

Q: Skating A figure skater tried various approaches to herSalchow jump in a designed experiment using 5...

A: Click to see the answer

Q: Annual sales, in millions of dollars, for 21 pharmaceutical companies follow.8408 1374 1872 8879 245...

A: a) Concept Used: The five-number summary is the lowest value, Quartile-1, median, Quartile-3 and hig...

Q: Fill in the blanks. a. In the Mallows’ Cp criterion, the value of p is _______. b. In all-subsets re...

A: Click to see the answer

Q: Identify the population in the given scenario.  A recent poll of 12151215 corporate executives showe...

A: Click to see the answer

Q: Figure 1 shows sample means from samples of size n=30 from a population. Estimate the value of the p...

A: Click to see the answer

Q: Why do all cells in two-factor studies should have equal sample sizes?

A: Two factor or two-way ANOVA compares the differences of mean between groups which have split into tw...

Q: which is cheaper: eating out or dining in? the mean cost of a flank steak, broccoli, andrice bought ...

A: Click to see the answer

Q: The XO Group Inc. conducted a survey of 13,000 brides and grooms married in the UnitedStates and fou...

A: Click to see the answer

Q: For random samples from an infinite population, whathappens to the standard error of the mean if the...

A: Note: Thank you for the question. Since multiple subparts are posted, according to our policy, we ar...

Q: Suppose that C and D are mutually exclusive events such that P(C) = 0.14 and P(D) = 0.32. Determine ...

A: Given, P(C) = 0.14  P(D) = 0.32  P(C or D)=?    

Q: Student: Period: Date: Analyzing Numerical Data: Estimating Large Numbers 1.C Student Activity Sheet...

A: Click to see the answer

Q: What does experimental confirmation of a correlation?

A: Click to see the answer

Q: Oakland passengers revisited In Chapter 8, Exercise15, we created a linear model describing the tren...

A: Click to see the answer

Q: 3. Column titles in a table should describe which of the following? A) The independent variable B) T...

A: Click to see the answer

Q: can you please analyis this for meit is rlated to corona virose in one week in OMAN

A: Let us try to analyse each chart separately. Let us start with the bar graph titled “new cases”. Thi...

Q: The following table represents gas well completions during 1986 in North and South America. Source: ...

A: Click to see the answer

Q: Gay marriage. In May 2012, a CNN/ORC Poll asked arandom sample of 1009 U.S. adults this question:Do ...

A: Click to see the answer

Q: Trial best fits which of the following descriptions? Select the correct answer below:   a s...

A: The trial is a process to perform an experiment which can be infinitely times repeated and have well...

Q: Define the term Mean.

A: Mean is the average of the observations or numbers in the data. It is referred as sample mean or pop...

Q: Calculate the 30th percentile of the data shown x 2 4.7 4.8 8.6 12.3 16.8 19.2 ...

A: Given information- We have given a data set- X - 2, 4.7, 4.8, 8.6, 12.3, 16.8, 19.2, 20.7, 21.7 We h...

Q: What does the p-value for a test result represents?

A: Click to see the answer

Q: Sixty-five randomly selected car salespersons were asked the number of cars they generally sell in o...

A: Click to see the answer

Q: Use the given categorical data to construct the relative frequency distribution.   Natural births ra...

A: Click to see the answer

Q: Define discrete probability distribution

A: Discrete probability distribution is defined as the probability of occurrence of each value of a dis...

Q: A researcher says that there is a 75% chance a polygraph test (lie detector test) will catch a perso...

A: Click to see the answer

Q: What is difference between mean, median and mode?

A: Mean: The arithmetic mean (also called the mean) is the most commonly used measure of central tenden...