Assume that thee readings at freezing on a bundle of thermometers are normally distributted with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find the probability of obtaining a reading greater than -1.031°C P(Z > - 1.031) = ________________

A normal population has mean  =μ9  and standard deviation  =σ5 . Find the proportion of the population that is greater than  4 . Round the answers to at least four decimal places.     The proportion of the population that is greater than  4  is    .

The mean exam score for 44. male high school students are 19.9 and the population standard deviation is 5.2. The mean exam score for 55female high school students is 19.4 and the population standard deviation is 4.9. At α=0.01​, can you reject the claim that male and female high school students have equal exam​ scores? Complete parts​ (a) through​ (e).   ​(a) Identify the claim and state H0 and Ha.   What is the​ claim?   A. Male high school students have lower exam scores than female students.   B. Male and female high school students have different exam scores.   C. Male and female high school students have equal exam scores.   D. Male high school students have greater exam scores than female students.   What are H0 and Ha​?   Find the critical​ value(s) and identify the rejection​ region(s). The critical​ value(s) is/are   Find the standardized test statistic z for μ1−μ2.

Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15. Click to view page 1 of the table, Click to view page 2 of the table. Step 1 теan(u) s tan dard o 90 115 The area of the shaded region is (Round to four decimal places as needed.) Step 2 Required pr X-µ = P = P (Z < 1 = P (Z < 2 = 0.9773 Enter your answer in the answer box and then click Check Answer. %3D All parts showing Clear All Final Check P Type here to search hp

Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find the probability of obtaining a reading less than -2.451 C. P(Z < - 2.451) (Round your answer to 4 decimal places.) Submit Question 9. 3 y W e

Calcium levels in people are normally distributed with a mean of 9.7 mgdL and a standard deviation of 0.5 mgdL . Individuals with calcium levels in the bottom 10% of the population are considered to have low calcium levels. Find the calcium level that is the borderline between low calcium levels and those not considered low. Carry your intermediate computations to at least four decimal places. Round your answer to one decimal place.

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A population of score has μ  = 44. in this population, a score of X = 40 corresponds to z = -0.50. What is the population standard deviation?