A random sample of 411 high school students was selected in order to compare the heights, in centimeters (cm), of vegetarians and nonvegetarians. The relative-frequency histograms below show the distributions of heigh for the 15 students who said that they were vegetarian and for 396 students who said they were not vegetarian. Vegetarian 0.4 0.3 0.2 0.1 - 0.0 (a) What are the observational units? What are the variables, and what type of variable are they 140 150 160 170 180 190 200 Height (cm) (b) Write a few sentences comparing the distributions of height for the vegetarians and nonvegetarians. Not a Vegetarian 0.4 (c) Explain why it is better to use relative frequencies (proportions) rather than frequencies (counts) when comparing the vegetarians and nonvegetarians. 0.3 0.2 equency of Height (cm) Relative Frequency of Height (cm)

We have a distribution with a mean of ? = 78.0 and ? = 12.5. Find the raw score equivalents for the following z-scores: -3.10, -1.55, -1.00, 0.55, 1.76. 2.33, 3.90

A researcher wanted to know the relationship between sales per 24h in a department store, the amount of rain that day (in mm) and the mean age of 1000 customers. The SPSS output is presented below. What is the correct way to report the correlation between sales per 24h and rainfall that day in APA style?   Question 24 options:   r(16) = -.909, p<.001   r(18) = -.909, p=.000   r(18) = -.909, p<.001   r(16) = -.909, p=.000

According to Our World in Data, male heights follow a normal distribution with µ =178.4 cm and o= 7.6 cm. What is the 99th percentile height for men? Select the correct Excel command. =NORM.DIST(0.99, 178.4, 7.6) =NORM.INV(0.99, 178.4, 7.6) =NORM.INV(1-0.99, 178.4, 7.6) =NORM.DIST(1-0.99, 178.4, 7.6)

Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest speed measured was 73.6 Mbps. The complete list of 50 data speeds has a mean of x = 16.39 Mbps and a standard deviation of s = 19.16 Mbps. a. What is the difference between carrier's highest data speed and the mean of all 50 data speeds? b. How many standard deviations is that [the difference found in part (a)]? c. Convert the carrier's highest data speed to az score. d. If we consider data speeds that convert to z scores between -2 and 2 to be neither significantly low nor significantly high, is the carrier's highest data speed significant? a. The difference is Mbps. (Type an integer or a decimal. Do not round.) b. The difference is standard deviations. (Round to two decimal places as needed.) 1 c c. The z score is z= (Round to two decimal places as needed.) 1 of d. The carrier's highest data speed is comp

The maximum weights (in kilograms) for which one repetition of a half-squat can be performed and the jump heights (in centimeters) for 12 international soccer players are given in the accompanying table. The correlation coefficient, rounded to three decimal places, is r=0.707. At & = 0.05, is there enough evidence to conclude that there is a significant linear correlation between the variables? Click the icon to view the soccer player data. Determine the null and alternative hypotheses. Ho:p = 0 Ha:p # 0 Determine the critical value(s). to = (Round to three decimal places as needed. Use a comma to separate answers as needed.)

Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest speed measured was 78.6Mbps. The complete list of 50 data speeds has a mean of x=15.15 Mbps and a standard deviation of s=21.46Mbps.   a. What is the difference between​ carrier's highest data speed and the mean of all 50 data​ speeds? b. How many standard deviations is that​ [the difference found in part​ (a)]? c. Convert the​ carrier's highest data speed to a z score. d. If we consider data speeds that convert to z scores between−2and 2 to be neither significantly low nor significantly​ high, is the​ carrier's highest data speed​ significant?

For a data set of the pulse rates for a sample of adult​ females, the lowest pulse rate is 38beats per​ minute, the mean of the listed pulse rates is x =73.0 beats per​ minute, and their standard deviation is sequals=23.2 beats per minute.   a. What is the difference between the pulse rate of 38 beats per minute and the mean pulse rate of the​ females? b. How many standard deviations is that​ [the difference found in part​ (a)]? c. Convert the pulse rate of 38 beats per minutes to a z score. d. If we consider pulse rates that convert to z scores between minus−2 and 2 to be neither significantly low nor significantly​ high, is the pulse rate of 38 beats per minute​ significant?

For a data set of the pulse rates for a sample of adult females, the lowest pulse rate is 39 beats per minute, the mean of the listed pulse rates isx= 78.0 beats per minute, and their standard deviation is s = 20.7 beats per minute. a. What is the difference between the pulse rate of 39 beats per minute and the mean pulse rate of the females? b. How many standard deviations is that [the difference found in part (a)]? c. Convert the pulse rate of 39 beats per minutes to a z score. d. If we consider pulse rates that convert to z scores between - 2 and 2 to be neither significantly low nor significantly high, significant? the pulse rate of 39 beats per minute a. The difference is beats per minute. (Type an integer or a decimal. Do not round.) b. The difference is standard deviations. (Round to two decimal places as needed.) c. The z score is z = (Round to two decimal places as needed.) d. The lowest pulse rate is

Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest speed measured was 73.3 Mbps. The complete list of 50 data speeds has a mean of x = 18.04 Mbps and a standard deviation of s = 17.52 Mbps. a. What is the difference between carrier's highest data speed and the mean of all 50 data speeds? b. How many standard deviations is that [the difference found in part (a)]? c. Convert the carrier's highest data speed to a z score. d. If we consider data speeds that convert to z scores between – 2 and 2 to be neither significantly low nor significantly high, is the carrier's highest data speed significant? a. The difference is Mbps. (Type an integer or a decimal. Do not round.) b. The difference is standard deviations. (Round to two decimal places as needed.) c. The z score is z=. (Round to two decimal places as needed.) d. The carrier's highest data speed is not significant.