Let , , n=40
Now , the sampling distribution of the sample mean is ,
Therefore ,
; From standard normal distribution table
Therefore , the probability that the their mean is above 215 is 0.0287
8! standard deviation of 50. If 40 different applicants are randomly selected, find the probability that...
Use the given data to find the equation of the regression line. Round the final values to tenths, if necessary. Points: 5 17) 1.2 1.4 1.6 1.8 2.0 54 53 55 54 56 How did you find the equation of the regression line?
Use the information to make each prediction. If the prediction is not reliable, state so. Round the final values to three decimal places, if necessary, 2) x 1.2 1.4 1.6 1.8 2.0 y 54 53 55 54 56 T0.6934 2) y = 50.4 +2.50% a.) Find the predicted value of y for x = 6.1 b.) Find the predicted value of y for x = 1.3 c.) Find the predicted value of y for x = 2.3
Use the information to make each prediction. If the prediction is not reliable, state so. Round the final values to three decimal places, if necessary. 2) 1.2 1.4 1.6 1.8 2.0 y 54 53 55 54 56 r=0.6934 y = 50.4 + 2.50x 2) a.) Find the predicted value of y for x = 6.1 b.) Find the predicted value of y for x = 1.3 c.) Find the predicted value of y for x = 2.3
Use the information to make each prediction. If the prediction is not reliable, state so. Round the final values to three decimal places, if necessary. 2) 1.2 1.4 1.6 1.8 2.0 y 54 53 55 54 56 r=0.6934 y = 50.4 + 2.50x 2) a.) Find the predicted value of y for x = 6.1 b.) Find the predicted value of y for x = 1.3 c.) Find the predicted value of y for x = 2.3
1 A+ L At a hazelnut spread factory in Chelsea, 12 jars are randomly selected and examined. The following percentage of impurities are reported: 2.3 1.9 2.1 2.8 2.3 3.6 1.8 2.1 3. 2 2 1.9 1.4 a. Find a point estimate for u, the average percentage of impurities. b. Find a point estimate for 02, the variance of percentages of impurities. C. Find a 90% confidence interval for u. d. Find a 95% confidence interval for o?. At a...
Check my work The following data show the retail price for 12 randomly selected laptop computers along with their corresponding processor speeds in gigahertz. Computers Speed 2.0 1.6 1.6 1.8 2.0 1.2 2.0 1.6 2.0 NOWN Price $1008.50 461.00 532.00 971.00 1068.50 506.00 1098.50 693.50 1057.00 1001.00 468.50 435.50 Click here for the Excel Data File a. Develop a linear equation that can be used to describe how the price depends on the processor speed. (Negative value should be indicated...
Use the given data to find the equation of the regression line. Round the final values to three significant digits, if necessary. Two different tests are designed to measure employee productivity and dexterity. Several employees are randomly selected and tested with these results (please type answer for easy clarity). Productivity 23 25 28 21 21 25 26 30 34 36 Dexterity 49 53 59 42 47 53 55 63 67 75
Statistics Midterm Assessment In-Class Section 1.) Assume this is a randomly selected list of the toeal points sooeed in twenty-four Super Bowls: 6 37 37 39 39 41 43 44 44 47 50 53 54 55 56 56 57 59 61 61 65 69 6975 a.) Find the four "measures of center" and the standard deviation b.) Give the valuey efthe 5-number summary c-) Are there any ścores thar woulJ be considered d.) Based on the dsfinition involving the interquartile...
The table below gives the number of hours ten randomly selected students spent studying and their corresponding midterm exam grades. Using this data, consider the equation of the regression line, yˆ=b0+b1xy^=b0+b1x, for predicting the midterm exam grade that a student will earn based on the number of hours spent studying. Keep in mind, the correlation coefficient may or may not be statistically significant for the data given. Remember, in practice, it would not be appropriate to use the regression line...
solvel only E F G H below is pat data 3. A hospital administrator wished to study the relation between patient satisfaction (Y) and patients age (Xi, in years), severity of illness (X2, an index) and anxiety level (X3, an index). The administrator randomly selected 23 patients and collected the data in pat, where larger values of Y, X2 and X3 are, respectively, associated with more satisfaction, increased severity of illness and more anxiety. The data is saved in Moodle2...