Concept explainers
What was the average price of a room at two-star, three-star, and four-star hotels around the world during 2016? The file Hotel Prices contains the average hotel room prices in Canadian
For each of the three groups of hotels (two-, three-, and four-stars):
a. Construct frequency and percentage distributions.
b. Construct a histogram and a percentage
c. Construct a cumulative percentage distribution and plot a cumulative percentage polygon(ogive).
d. What conclusions can you reach about the cost of two-star, three-star, four-star hotels?
e. Construct separate
f. What conclusions can you reach about the relationship of the price of two-star, three-star, and four-star hotels?
Want to see the full answer?
Check out a sample textbook solutionChapter 2 Solutions
Basic Business Statistics, Student Value Edition (13th Edition)
- Do heavier cars really use more gasoline? Suppose a car is chosen at random. Let x be the weight of the car (in hundreds of pounds), and let y be the miles per gallon (mpg). Complete parts (a) through (e) after verifying that Σx = 302, Σy = 173, Σx2 = 12,116, Σy2 = 4,077, Σxy = 6,100, and r ≈ −0.8787. (a) Draw a scatter diagram displaying the data. please answer ALL parts of a-e.arrow_forwardLet x be per capita income in thousands of dollars. Let y be the number of medical doctors per 10,000 residents. Six small cities in Oregon gave the following information about x and y. Complete parts (a) through (e) after verifying that Σx = 53.1, Σy = 84, Σx2 = 472.63, Σy2 = 1,286.66, Σxy = 759.42, and r ≈ 0.9277. (a) Draw a scatter diagram displaying the data. answer ALL parts a-e please.arrow_forwardAn economist is studying the job market in Denver area neighborhoods. Let x represent the total number of jobs in a given neighborhood, and let y represent the number of entry-level jobs in the same neighborhood. A sample of six Denver neighborhoods gave the following information (units in hundreds of jobs). Complete parts (a) through (e) after verifying that Σx = 196, Σy = 25, Σx2 = 7,478, Σy2 = 145, Σxy = 988, and r ≈ 0.8176. (a) Draw a scatter diagram displaying the data. Find x (in hundreds). (Round your answer to four decimal places.) please answer ALL parts of a-b.arrow_forward
- Let x be the age in years of a licensed automobile driver. Let y be the percentage of all fatal accidents (for a given age) due to speeding. For example, the first data pair indicates that 37% of all fatal accidents of 17-year-olds are due to speeding. Complete parts (a) through (e) after verifying that Σx = 329, Σy = 121, Σx2 = 18,263, Σy2 = 2955, Σxy = 4,187, and r ≈ −0.9647. (a) Draw a scatter diagram displaying the data. please answer parts a-e.arrow_forwardLet x be the number of different research programs, and let y be the mean number of patents per program. As in any business, a company can spread itself too thin. For example, too many research programs might lead to a decline in overall research productivity. The following data are for a collection of pharmaceutical companies and their research programs.Complete parts (a) through (e) after verifying that Σx = 90, Σy = 8, Σx2 = 1,420, Σy2 = 11.46, Σxy = 113.4, and r ≈ −0.8857. (c) Graph the least-squares line. Be sure to plot the point (x, y) as a point on the line. (d) Find the value of the coefficient of determination r2. (Round your answer to four decimal places.) Suppose a pharmaceutical company has 15 different research programs. What does the least-squares equation forecast for y = mean number of patents per program? (Round your answer to two decimal places.) Please answer ALL parts of C-E.arrow_forward4. The average July temperature (in °C) was measured at several cities for both La Niña and El Niño years. The results are as follows City1 City2 City3 City4 City5 City6 El Nino La Nina 25 27 23 25 24 24 23 26 23 22 23 21 Is there evidence that the average temperatures are significantly different in La Niña and El Niño years? Also, find a 90% CI for the difference.arrow_forward
- 2. A nutritionist claims that 75% of the preschool children in a certain country have protein deficient diets. A sample survey reveals that 206 preschool children in a sample of 300 have protein deficient diets. Test the claim at the 0.02 level of significance. Also, estimate the p-value.arrow_forward5. The mean protein intake was measured for three groups of women: (1) women eating a standard American diet (STD), (2) women eating a lacto-ovo-vegetarian diet (LAC), and (3) women eating a strict vegetar- ian diet (VEG). The mean and sd for protein intake (mg) are below. Group Mean ad STD 74 16 n 10 LAC 56 16 10 VEG 55 9 10 Are there significant differences among groups? If so, which pairs of groups are different?arrow_forward(Q3) For this part of your project, you are doing some more advanced level of statistical analysis. Choose any dataset uploaded in the "Datasets" folder which contains at least two variables. (25) (a) Consider any two variables from your dataset. You should have a series of data for each variable. Try to work with a bigger sample size and select data where the variables have some causal relationship. Like one is a dependent and the other is an independent variable. Oklahoma sales and use tax data (2019 and 2020) 2019 2020 69,789,164.72 61,297,049.85 49,426,938.44 52,949,409.21 58,208,863.52 53,778,028.78 59,555,751.89 62,134,634.89 56,000,708.29 61,787,411.70 58,794,507.68 65,964,278.87 58,021,609.42 65,929,818.66 64,110,664.49 65,413,297.33 58,055,253.43 64,759,629.42 60,359,151.50 64,007,100.08 61,350,441.43 71,557,697.75 61,297,049.85 78,861,854.89arrow_forward
- 1. A job placement director claims that mean starting wage for nurses in New Mexico is $25 per hour. We suspect that this number is too opti- mistic. A random sample of 20 nurses' wages has a mean $22.6 and a standard deviation of $1.2 per hour. Is there enough evidence to reject the director's claim at a = 0.01? Also, estimate the p-value.arrow_forward6. For a group of students, their scores for English course (7) and for Cal- culus course (y) were recorded. Student ID English(x) | Calc.(y) | (± − T)² | (y — D)² | (1 − 1)(y – V) 1 2.5 2.5 0.25 0.25 0.25 2 1 3 1 0 0 3 3 2.5 0 0 1 3.5 4 0.25 1 0.5 LO 5 2 3 1 0 0 Sum 15 15 1.5 0.75 (a) Fill in the blanks (b) Compute the standard deviation of y (c) Compute the correlation coefficient r. Is it significantly different from 0? (d) Estimate the least squares line.arrow_forwardNot use ai pleasearrow_forward
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw HillBig Ideas Math A Bridge To Success Algebra 1: Stu...AlgebraISBN:9781680331141Author:HOUGHTON MIFFLIN HARCOURTPublisher:Houghton Mifflin HarcourtHolt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGAL