Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of O°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find the probability of obtaining a reading between -2.307°C and -0.388°C. P( – 2.307 < Z < - 0.388)

Assume that z-scores are normally distributed with a mean of 0 and a standard deviation of 1.If P(−b<z<b)=0.1904, find b.

Suppose that the TSH (Thyroid Stimulating Hormone) levels among healthy individuals are normally distributed with a mean of 3.2 units/mL. Suppose also that exactly 95% of healthy individuals have TSH levels below 5.8 units/mL. Find the standard deviation of the distribution of TSH levels of healthy individuals. Carry your intermediate computations to at least four decimal places. Round your answer to at least two decimal places. units/mL

Ages of Gamblers The mean age of a sample of 25 people who were playing the slot machines is 49.9 years, and the standard deviation is 6.8 years. The mean age of a sample of 33 people who were playing roulette is 55.5 with a standard deviation of 3.2 years. Can it be concluded at =α0.10 that the mean age of those playing the slot machines is less than those playing roulette? Use μ1 for the mean age of those playing slot machines. Assume the variables are normally distributed and the variances are unequal. State the hypotheses and identify the claim with the correct hypothesis. H0:    Claim or not a claim H1:   Claim or not a claim This Hypothesis test is a one-tailed or two-tailed test. Find the critical value(s). Round the answer to at least two decimal places. If there is more than one critical value, separate them with commas.  Critical Value(s): Compute the test value. Always round z score to at leat 2 decimal places.  z= Make the decision reject or accept the null hypothesis.…

Assume that adults have IQ scores that are normally distributed with a mean of mu equals 100μ=100 and a standard deviation sigma equals 20σ=20. Find the probability that a randomly selected adult has an IQ between 84 and 116.

Assume that z-scores are normally distributed with a mean of 0 and a standard deviation of 1. If P(- b < z < b) = 0.9008, find b. b =

Assume that z-scores are normally distributed with a mean of 0 and a standard deviation of 1.If P(−b<z<b)=0.98P(-b<z<b)=0.98, find b.

A distribution is given as X~U (2,10).What is the 75th percentile? What is the 40th percentile? What is the mean? What is the standard deviation?     (Round to 2 decimal places.)

A population of scores has µ=44. In this population, a score of X= 40 corresponds to z= - 0. 50. What is the population standard deviation?

The annual rainfall in a certain region is modeled using the normal distribution shown below. The mean of the distribution is 36.9 cm and the standard deviation is 4.8 cm. In the figure, V is a number along the axis and is under the highest part of the curve. And, U and W are numbers along the axis that are each the same distance away from V. Use the empirical rule to choose the best value for the percentage of the area under the curve that is shaded, and find the values of U, V, and W. Percentage of total area shaded: (Choos 20 25 30 35 0 40 0 45 50 55 ( cm) Check Save For Later Submit 2021 McGraw Hill LLC. A Rights Reserved. Terms of Use | Privacy Center MacBook 80 F3 88 F4 44 esc F1 F10 FS FB F9 @ 23 $ & 3 5 6 7 8 9 Q E T. Y P A F G H K ock C V alt alt MOSISO command optic ontrol option command