(20 pts)1. According to a salary survey, the average salary offered to computer science Majors who...
(20 pts)2. According to records, the average length of all long-distance calls placed in 1999 was 12.44 minutes. The company's management wanted to check if the mean length of the current long-distance calls is different from 12.44 minutes. A sample of 150 produced a mean length of 13.71minutes with a standard deviation of 2.65 minutes. Using the 5% significance level, can you conclude that the mean length of all current long-distance calls is different from 12.44 minutes? a. State the...
(20 pts)4. A university says the mean number of classroom hours per week for full-time faculty is 11.0. A random sample of the number of classroom hours for full-time faculty for one week is listed below. You work for a student organization and are asked to test this claim. At = 0.01, do you have enough evidence to reject the university's claim? 11.8 8.6 12.6 7.9 6.4 10.4 13.6 9.1 a. State the null and alternative hypotheses. b. Find the...
4) The ABC Company has recently replaced a machine critical to their manufacturing process. The average time for a worker to complete a certain task using the old machine was 16 mins. The times to complete the task using the machine are normally distributed with standard deviation 9 mins. The company wants to test if the average time to complete the task using the new machine has changed (i.e., is different). To this end, they timed 25 workers using the...
BBA 403 TEST 3: Name: Score:_ SOLVE AND THOROUGHLY INTERPRET YOUR ANSWER 1. A marketing manager conducted a study to determine whether there is a linear relationship between many spent on advertising and company sales. The data are shown on the table below. Display the data in a scatter plot, calculate the correlation coefficient, state a conclusion, and interpret the result Adverstising Company Expense, (1000s of s) (1000s of ) 2.4 16 2.0 26 14 1.6 2.0 2.2 184 220...
Use Excel Functions and show which functions you used. You may take screenshots. For Problems #1 through #9, consider the following information: According to product packaging, the calorie count for a single house brand premium milk chocolate chip pecan cookie baked exclusively for Sale Mart is 200 calories. A consumer health testing lab tech is double checking this claim, and has collected a random sample of 16 individual milk chocolate chip pecan cookies. The corresponding calories were as follows 193...
In a recent global survey across 16 major countries, overeating is cited as the third biggest health concern amid COVID-19 after underexercising and anxiety. The survey also revealed that women are more likely to admit they are overeating compared to men with the biggest gender gap resulting in Canada. A Canadian researcher is interested in finding if the proportion of females aged 25 or over suffering from emotional overeating (P1 ) is higher than the proportion of males suffering from...
Please Help me with this Questions A software design firm has developed a prototype educational computer game for children. One of the important factors in the success of a game like this is the time it takes the child to play the game. Two factors are important: the mean time it takes to play and the variability in time required from child to child. Experience indicates that the mean time should be 11 minutes or less and the standard deviation...
please show as much work as possible Page |1 EG e 2019 Please show your worlearly to eive fuires. ( Vor wants to study the effectiveness of the Statistics course to improve students' scores included a pre-testing score and post-testing score of each student. To compare the differences, I computed (post-testing score - pre-testing score). Seven students were randomly selected and completed both tests. The results follow. Let 1-a = 0.99 and a = 0.01. %3D Post-Testing score Pre-Testing score...
Question 2 25 points Save Answer Problem Solving #2. (Finding a Job Through Networking in a survey of randomly selected 40 workers, to the question what is the strategy for finding jobs after graduation?. their answers are given as follows: N-Networking R-Regular application A Advertisement 0Other means TRN N NON ANNNN O NA NRN N N N N N N N N N N (a) What is the underlying population of interest? What is the variable is the variable qualitative...
the bottom three are the same question ^ ^ ^ Find the probability and interpret the results. If convenient, use technology to find the probability. The population mean annual salary for environmental compliance specialists is about $64,500. A random sample of 44 specialists is drawn from this population. What is the probability that the mean salary of the sample is less than $62,000? Assume o = $6.200 The probability that the mean salary of the sample is less than $62,000...