Find the minimum sample size n needed to estimate u for the given values of c, o, and E. c= 0.90, o = 8.8, and E = 2 Assume that a preliminary sample has at least 30 members. (Round up to the nearest whole number.)
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- е. Sample region 6. Question: In a hypothesis test, what does the values of T(0) signify? a. Smallest level of significance for rejection of Null Hypothesis. b. Largest level of significance for rejection of Null Hypothesis. c. Smallest level of significance for acceptance of Null Hypothesis d. Largest level of significance for acceptance of Null Hypothesis 3Consider the following population of ten digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. a. Find 3 random samples of the five digits from the list. Record the elements of each sample. b. find the arithmetic average of each sample. (Hint: to find the average, sum the data enteries and divide the sum by the number of enteries in the sample.) there is a line over each of these x1 = x2= x3= c. comment on how your results compare with the average of the entire population.The coefficient of determination for the following sample data is: x 420 610 625 500 400 450 550 650 480 565 y 2.80 3.60 3.75 3.00 2.50 2.70 3.50 3.90 2.95 3.30 a) 0.104 b) 0.958 c) 0.979 d) 0.5
- 3. Can SAT scores predict college performance? Let x be a variable that represents SAT score of a computer science major, and let y be a variable that represents a student’s GPA upon graduation. A random sample of n =15 computer science majors provided their SAT scores and GPAs: x 1232 1070 1086 1287 1130 1048 1121 1095 1135 1208 1333 1160 1186 1243 1261 y 3.52 2.91 2.4 3.47 3.47 2.37 2.4 2.24 3.02 3.32 3.59 2.54 3.19 3.71 3.58 The scatter diagram for the SAT score and GPA is given below: (a) Find the sample correlation coefficient r. Truncate to two decimal places. What does the value tell you about the data? (b) Find the equation of the least squares line . Truncate to four decimal places. What does the slope mean? (c) Find the value of the coefficient of determination . Truncate to two decimal places. What does this number mean? (d) What is the predicted GPA if a computer science major got a…Consider the idea of a sampling distribution in the case of a very small sample from a very small population. The population is 10 students in a certain class: Student 1 3 4 6. 7 8 9. Weight 136 99 118 129 125 170 130 128 120 147 The mean weight in pounds u in this population is the parameter of interest. la) Finish filling in the frequency distribution table: Counts (Frequency) 90-109.9 1 110-129.9 130-149.9 150-169.9 170-179.9 Total: 10 1b) Find the population mean u.Consider the following information. Sample 1 19 11 9 14 Sample 2 15 14 7 11 Calculate the differences, d,. (Use Sample 1 Sample 2.) Sample 1 19 11 9. 14 Sample 2 15 14 11 d; Calculate the values for d and s. (Round your answer for s, to three decimal places.) II
- A population consists of the following N= 6 scores: 0, 4, 6, 1, 3, and 5. Compute u and o for the population. Find the z-score for each score in the population. Transform the original population into a new population of N=6 scores with µ = 50 and o = 10.2. Find the 99% and 95% CIs for each of the following samples: a. X = 15, N = 17, s = 5 b. EX = 240, N = 40, s = 1.6 c. N = 170, EX = 1,445, EX? = 12,343.25 %3D %3D %3D %3DGiven Range of x - 20, Risk of x =25> IQR 15 Find the sample Variance, %3D A) B 400 c) 100 D) 625 225
- Suppose a certain retailer sells several models of refrigerators. A random sample of the models sold by this retailer and their corresponding cubic feet (cu. ft.) and list price can be found below. Model Model 1 Model 2 Model 31 with Thru-the-Door Ice and Water. Model 4 Model 5 Model 6 with Thru-the-Door Ice and Water Model 7 Model 8. Model 9 with Thru-the-Door Ice and Water Model 10 with Thru-the-Door Ice and Water Model 11 with Thru-the-Door Ice and Water Model 12. Model 13 with Thru-the-Door Ice and Water Model 14 Model 14 Model 15 Model 16 with Thru-the-Door Ice and Water Model 17 Model 18 with Thru-the-Door Ice and Water Model 19 with Thru-the-Door Ice and Water Model 20 with Thru-the-Door Ice and Water Model 21 Cu.Ft. List Price 18.3 Ho: B₂ 20 H₂: B₁ 0 ⒸH₁: B₁ = 0 H₂: P₁0 24.8 25.4 19.3 17.3 19.6 25.0 25.4 26.0 25.6 18.0 25.0 20.2 24.5 $1,299.99 20.2 15.5 28.2 27.8 $899.99 23.6 $1,799.99 $1,799.99 $749.99 $599.99 $1,619.99 $999.99 $1,299.99 $1,299.99 $1,099.99 $679.99 $2,199.99…6. Given the following sample of n = 10 scores, for each individual score calculate the following: a) z-score b) a new standardized score with M = 50 and s = 20 X 19 10 2 16 13 4 11 6 18 15 X 19 10 2 6341618 15 z-score Standardized ScoreExample 20.15) Calculate (a) a weighted average of price relatives and (b) a weighted aggregate price index, both for year 2 (based on year 1), for the following commodities: Price (Rs) Commodity Weight Year 1 Year 2 A 5 215 210 B 10 250 275 C 4 1,100 1,300 D 8 950 950 E 13 170 200
