he work week for adults in the US that work full time is normally distributed with a mean of 47 hours. A newly hired engineer at a start-up company believes that employees at start-up companies work more on average then most working adults in the US. She asks 12 engineering friends at start-ups for the lengths in hours of their work week. Their responses are shown in the table below. Test the claim using a 1% level of significance. Give answer to at least 4 decimal places.   Hours 47 45 59 53 50 62 51 48 49 49 55 53

A study analyzed the sustainability behaviors of CPA corporations. The level of support for corporate sustainability​ (measured on a quantitative scale ranging from 0 to 160​ points) was obtained for each in a sample of 984 senior managers at CPA firms. The CEO of a CPA firm claims that the true mean level of support for sustainability is 66. Complete parts a through e.     What is a Type II error in this​ problem?     A. A Type II error would be to conclude that the true mean level of support for sustainability is 66 ​when, in​ fact, the mean is not equal to 66.   B. A Type II error would be to conclude that the sample mean level of support for sustainability is less than 66 ​when, in​ fact, the sample mean is greater than 66.   C. A Type II error would be to conclude that the true mean level of support for sustainability is not 66 ​when, in​ fact, the mean is equal to 66.   D. A Type II error would be to conclude that the sample mean level of support for…

Cris Turlock owns and manages a small business in San Francisco, California. The business provides breakfast and brunch food, via carts parked along sidewalks, to people in the business district of the city. Being an experienced businessperson, Cris provides incentives for the salespeople operating the food carts. This year, she plans to offer monetary bonuses to her salespeople based on their individual mean daily sales. Her first task is to see if there is a significant difference in the mean daily sales among the different salespeople. She chooses a "sample" of days for each salesperson and records the sales for each day. She then runs a one-way, independent-samples ANOVA test to determine whether or not she can conclude that at least one salesperson's performances is significantly different from the others. (Otherwise, she'll split the bonuses evenly among all the salespeople.) In her ANOVA, the "groups" are the different salespeople, and the variable of interest is the daily sales…

A congressperson wants to come up with a single value to describe the prices of homes in their district. However, their district consists of a few homes that are extremely expensive compared to the others. Which descriptive statistic should they use? a. Range b. Mode c. Median d. Mean

In a city with three high schools, all the ninth graders took a Standardized Test, with these results: High School Mean score on test Number of ninth graders Glenwood 76 272 Central City 93 325 Lincoln High 73 180 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was 80.7 . Of course, that is incorrect. What is the mean score for all ninth graders in the city? Round to one decimal place.mean of all ninth grader's scores =

A retail survey asked college students how much they planned to spend in various categories during the upcoming academic year. One category is the amount students planned to spend on school supplies. The data below show the amount of money students planned to spend on school supplies. 58, 60, 67, 69, 70, 73, 74, 77, 78, 80, 83, 84, 87, 89, 94, 96, 97, 100, 102, 105 USE SALT (a) Calculate the mean and median for the distribution of money students planned to spend on school supplies. mean median (b) What is the 75th percentile of the distribution? (c) Determine the five-number summary. minimum Q₁ median Q3 maximum

A mother is creating the family budget for next year and wants to come up with a single value to estimate the cost of the water bill every month based on the total from last year divided by 12 months. Which descriptive statistic should she use? O Mode O Median O Mean