CH7: Dr. Autumn conducts an experiment on a sample from a population with u = 65 ando = 10 and finds that the sample has a mean of M = 54. If the sample mean corresponds to az = -3.1, then how many scores are in the sample? (Hint: use standard rounding, e.g., 10.4 10; 10.5 = 11) %3D %3D %3D O a.n = 8 Ob.n = 11 Oc.n = 10 Od.n = 6 %3D O e. none of the options

The type of household for the U.S. population and for a random sample of 411 households from a community in Montana are shown below. Type of Household Percent of U.S.Households Observed Numberof Households inthe Community Married with children 26% 92 Married, no children 29% 121 Single parent 9% 31 One person 25% 102 Other (e.g., roommates, siblings) 11% 65 A) Find the value of the chi-square statistic for the sample. (Round the expected frequencies to two decimal places. Round the test statistic to three decimal places.)   B)Find or estimate the P-value of the sample test statistic. (Round your answer to three decimal places.)

The histogram (click the attacthed photo to view) shows the distribution of hurricanes that have hit a country from 1851 through​ 2015, where 1 is the weakest level and 5 is the strongest level.   A) The mean is? B) The variance is? C)The standard deviation is?

An analysis of variance produces SSbetween = 30, SSwithin = 60, and an F-ratio with df = 2, 15. For this analysis, what is the F-ratio? Question 14 options: 30/60 = 0.50 60/30 = 2.00 15/4 = 3.75 4/15 = 0.27

The distribution of male height (X) in the US is known to be normally distributed with mean of about 70 inches and variance of 25 inches. What is the IQR? (hint: think about what the IQR represents in a boxplot with regard to percentiles). The z tables can be found at the bottom of the written portion of the exam or at the end of Lecture Note 10. a.) 5.0 b.) 9.0 c.) 7.3 d.) 10.0 e.) 6.7

Steve's average golf score at his local course is 92.9 from a random sample of 60 rounds of golf. Assume that the population standard deviation for his golf score is 4.2. The standard error of the mean for this sample is ________. A)  0.54 B)  1.17 C)  1.56 D)  2.30