Refer to the accompanying data display that results from a sample of airport data speeds in Mbps. Complete parts (a) through (c) below. TInterval E Click the icon to view a t distribution table. (13.046,22.15) X= 17.598 Sx = 16.01712719 n= 50 a. What is the number of degrees of freedom that should be used for finding the critical value t,12? df =O (Type a whole number.) b. Find the critical value t,/2 corresponding to a 95% confidence level. (Round to two decimal places as needed.) c. Give a brief general description of the number of degrees of freedom. O A. The number of degrees of freedom for a collection of sample data is the number of sample values that can vary after certain restrictions have been imposed on all data values. O B. The number of degrees of freedom for a collection of sample data is the number of sample values that are determined after certain restrictions have been imposed on all data values. O C. The number of degrees of freedom for a collection of sample data is the total number of sample values. O D. The number of degrees of freedom for a collection of sample data is the number of unique, non-repeated sample values.

Use the provided information to calculate the t statistic and critical t values.

Calculate the correct t-statistics based on the information below.   X1 = 200   X2 = 198   n1 = 17   n2 = 17   s1 = 2.45   s2 = 2.35   Let us assume that two groups of students at Tarleton are being compared on their average weights. Do you think the groups are different in terms of weight (measured in pounds)?

Q1. A study was conducted to investigate the relationship between premature birth and mental development at 12 months. The infant's birth weight was used as an index of prematurity. At age 12 months, the child's mental development was recorded. The results are shown below (the weights are in pounds): Birth 4 6 7 8 Weight(x) Developmental 85 Quotients(y) 88 87 94 96 Summary: n = 5, £x=30, £x² = 190, Ey= 450, Ey² = 40590, Exy = 2728 . a. Find the least square prediction equation, y on x. b. Obtain a 95% confidence interval for the average value of y when x 6.5 (i.e., a C.I. for E(y|x= 6.5)). c. Obtain the coefficient of correlation (r) and interpret the result. d. Test the hypothesis that H, :p= 0 vs. H, : p0. Use a =0.05.

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k. Find the p nding to the data speed 5.9 Mbps. 0.2 0.2 0.2 03 05 E 0.7 0.9 1.5 1.7 2.2 2.4 37 3.9 4.3 5.7 91 94 94 10 5 11.3 12.3 13.7 14 9 15.3 25 8 Percentile of 5.9 =0.2 (Round to the nearest whole number as needed.) LO O 2N O o N 5 O 2N

Maps PQ Lawmaker's Trial Is.. C Home | Chegg.com M class Jose M - ilmar. V Citation Machine.8 Healthcare Spendin.. An experiment was conducted to measure the effectiveness of various feed supplements on the growth rate of chickens. A five number summary of the weights of the chicks in grams six weeks after hatching is as follows. Source: Anonymous (1948) Biometrika, 35, 214. • Min = 109 • Q1 = 194 ge rces Median = 253 Q3 = 314 Max = 413 ices 1. About percent of the chicks weigh more than 194. 2. About percent of the chicks weigh more than 253! 3. About percent of the chicks weigh more than 314. 4. About percent of the chicks weigh between 194 and 314. Submit Question ! 64°F search 144 -back 1% 6. 7