What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in the southwestern United States gave the following information about prehistoric extended family group of 96 members on what is now a Native American reservation. For this community, estimate the mean age expressed in years, the sample variance, and the sample standard deviation. For the class 31 and over, use 35.5 as the class midpoint. (Round your answer to one decimal place.) Average range(years) 1-10 11-20 21-30 31 and over   # of individuals  36 22 24 14   Mean= S2= S=

Calculate the standard score (z-score) of the given sample mean. Round your answer to two decimal places. u = 23 and o = 7; n = 72; ī = 22

Please answer

A random sample of Californians has a mean age of 34.4, but you want to know the mean age of all Californians. It sounds like you want to generalize from a ________ to a _________, and therefore you need to worry about ________. a. population; sample; descriptive statistics b. statistic; parameter; sampling error c. central tendency measure; variability measure; random selection d. sample; population; operational definitions

The average income in a state was ​$64 comma 64,000 per person per year. Suppose the standard deviation is ​$29 comma 29,000 and the distribution is​ right-skewed. Suppose we take a random sample of 100 residents of the state. Complete parts​ (a) and​ (b) below. a. What value should we expect for the sample​ mean? Why?   b. What is the standard error for the sample​ mean?

What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in the southwestern United States gave the following information about prehistoric extended family group of 85 members on what is now a Native American reservation. For this community, estimate the mean age expressed in years, the sample variance, and the sample standard deviation. For the class 31 and over, use 35.5 as the class midpoint. (Round your answer to one decimal place.) Average range(years) 1-10 11-20 21-30 31 and over   # of individuals  35 23 16 11   Mean=S2= S=

Suppose six pet food stores in the area were surveyed, and the following data shows how many types of pet food each of them carries. 7,7,9, 9, 11, 11 Calculate the sample mean and the sample standard deviation. Round your answers to three decimal places. T = Number Number S=

Find the (a) mean, (b) median, (c) mode, and (d) midrange for the data and then (e) answer the given question. Listed below are the jersey numbers of 11 players randomly selected from the roster of a championship sports team. What do the results tell us? 15 26 89 80 37 83 73 72 32 78 70 D a. Find the mean. The mean is 59.5. (Type an integer or a decimal rounded to one decimal place as needed.) b. Find the median. The median is 72. (Type an integer or a decimal rounded to one decimal place as needed.) c. Find the mode. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. The mode(s) is (are) (Type an integer or a decimal. Do not round. Use a comma to separate answers as needed.) B. There is no mode. d. Find the midrange. The midrange is 52. (Type an integer or a decimal rounded to one decimal place as needed.) e. What do the results tell us? OA. The midrange gives the average (or typical) jersey number, while the mean and median give two…

Using your calculator, find the range and standard deviation, round to two decimals places:The table below gives the number of hours spent watching TV last week by a sample of 24 children. 90 50 46 31 52 83 51 90 72 47 25 57 53 62 65 89 35 49 32 21 77 30 91 13 Range = Standard Deviation =

Find the mean for the given sample data. Unless otherwise specified, round your answer to one more decimal place than that used for the observations. The students in Hugh Logan's math class took the Scholastic Aptitude Test. Their math scores are shown below. Find the mean score. 572 529 346 346 557 356 359 592 470 482