Compute the range and sample standard deviation for strength of the concrete​ (in psi).     3940​, 4100​, 3300​, 3100​, 2920​, 3870​, 4100​, 4060

Compute the range and sample standard deviation for strength of the concrete (in psi). 3910, 4050, 3200, 3000, 2930, 3840, 4050, & 4060. The range is = Psi S= Psi

Assume that a randomly selected subject is given a bone density test. Those test scores are normally distributed with a mean of 0 and a standard deviation of 1. Draw a graph and find the probability of a bone density test score greater than -1.62. Sketch the region. Choose the correct graph below. O A. 1.62 Q The probability is (Round to four decimal places as needed.) OB. Q -1.62 -1.62 ♫ OD. Q -1.62 1.62 Ε

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Assume that a randomly selected subject is given a bone density test. Those test scores are normally distributed with a mean of 0 and a standard deviation of 1. Draw a graph and find the probability of a bone density test score greater than - 1.89. Sketch the region. Choose the correct graph below. O A. OB. C. O D. 1,89 -1.89 -1.89 -1.89 1,89 The probability is (Round to four decimal places as needed.)

Any quantity that is computed from a sample is called

Assume that a randomly selected subject is given a bone density test. Those test scores are normally distributed with a mean of 0 and a standard deviation of 1. Find the probability that a given score is between - 2.18 and 3.86 and draw a sketch of the region. Sketch the region. Choose the correct graph below. O A. В. OC. O D. -2.18 3.86 2.18 3.86 -2.18 3.86 -2.18 3.86 The probability is (Round to four decimal places as needed.) Click to select your answer(s). 山T00④ NOV 2. 1377 14 X P W MacBook Air esc 80 888 F3 F4 F7 FB F9 F10 $4 & 4 80 Q E Y A F G H. K /2x cv C V B D. 林 wwww wwwww

the driving distances (miles) to wor of 30 people are shown below. assume the population standard deviation is 8 miles. Find: 12, 9, 7, 3, 27, 21, 2, 30, 7, 4, 1, 10, 2, 9, 2, 28, 7, 10, 13, 6, 13, 7, 3, 13, 6, 6, 3, 13 ,12, 16, 18 a) the point estimate of the population mean  b) the margin of error for a 95% confidence interval  c) contruct a 95% confidence interval for the population mean.

The shelf life of a batteries produced by one major company are normally distributed with a mean of 4.3 years and a standard deviation of 0.6 years. The figure below shows the distribution of shelf lives of batteries produced by one major company. Calculate the shaded area under the curve. Answer: