Calculate the following probabilities using the z-score tables (four decimal places): P(z < 1.33) = %3D %3D P(-1.48 < z< 0.57) = %3D mod/quiz/summary.php?attempt=2125666&cmid%3D1872380
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- Assume that adults have IQ scores that are normally distributed with a mean of 98.8 and a standard deviation of 15.2. Find the probability that a randomly selected adult has an IQ greater than 122.2. (Hint: Draw a graph.) The probability that a randomly selected adult from this group has an IQ greater than 122.2 is (Round to four decimal places as needed.)2Assume that adults have IQ scores that are normally distributed with a mean of 104.3 and a standard deviation of 15.6. Find the probability that a randomly selected adult has an 1Q greater than 125.0. (Hint: Draw a graph.) The probability that a randomly selected adult from this group has an 1Q greater than 125.0 is (Round to four decimal places as needed.)
- Solve and DRAW the corresponding graph. Asap pleaseAssume that adults have IQ scores that are normally distributed with a mean of 104.9 and a standard deviation of 16. Find the probability that a randomly selected adult has an IQ greater than 132.8. (Hint: Draw a graph.) The probability that a randomly selected adult from this group has an IQ greater than 132.8 is (Round to four decimal places as needed.)Assume that different groups of couples use a particular method of gender selection and each couple gives birth to one baby. This method is designed to increase the likelihood that each baby will be a girl, but assume that the method has no effect, so the probability of a girl is 0.5. Assume that the groups consist of 45 couples. Complete parts (a) through (c) below. a. Find the mean and the standard deviation for the numbers of girls in groups of 45 births. The value of the mean is μ=nothing. (Type an integer or a decimal. Do not round.) The value of the standard deviation is σ=nothing. (Round to one decimal place as needed.) b. Use the range rule of thumb to find the values separating results that are significantly low or significantly high. Values of nothing girls or fewer are significantly low. (Round to one decimal place as needed.) Values of nothing girls or greater are significantly high. (Round to one decimal place as needed.) c. Is the result of 31 girls…
- Assume that adults have 1Q scores that are normally distributed with a mean of 103.1 and a standard deviation of 24.4. Find the probability that a randomly selected adult has an IQ greater than 131.3. (Hint: Drawa graph.) The probability that a randomly selected adult from this group has an IQ greater than 131.3 is (Round to four decimal places as needed.)An accounting firm annually monitors a certain mailing service's performance. One parameter of interest is the percentage of mail delivered on time. In a sample of 346,000 items mailed between Dec. 10 and Mar. 3—the most difficult delivery season due to bad weather and holidays—the accounting firm determined that 241,300 items were delivered on time. Use this information to make a statement about the likelihood of an item being delivered on time by that mailing service. Assuming a confidence level of 95%, the likelihood of an item being delivered on time (when it was mailed between Dec. 10 and Mar. 3) is in the interval (enter your response here,enter your response here). (Round to four decimal places as needed.)Assume that different groups of couples use a particular method of gender selection and each couple gives birth to one baby. This method is designed to increase the likelihood that each baby will be a girl, but assume that the method has no effect, so the probability of a girl is 0.5. Assume that the groups consist of 44 couples. Complete parts (a) through (c) below. a. Find the mean and the standard deviation for the numbers of girls in groups of 44 births. The value of the mean is (Type an integer or a decimal. Do not round.) The value of the standard deviation is o = (Round to one decimal place as needed.) b. Use the range rule of thumb to find the values separating results that are significantly low or significantly high. Values of girls or fewer are significantly low. (Round to one decimal place as needed.) Values of girls or greater are significantly high. (Round to one decimal place as needed.) c. Is the result of 35 girls a result that is significantly high? What does it…
- Assume that adults have IQ scores that are normally distributed with a mean of 104.7 and a standard deviation of 24.1. Find the probability that a randomly selected adult has an IQ greater than 137.1. (Hint: Draw a graph.) The probability that a randomly selected adult from this group has an IQ greater than 137.1 is (Round to four decimal places as needed.)Suppose the returns on a particular asset are normally distributed. Also suppose the asset had an average return of 12.1% and a standard deviation of 26.6%. Use the NORMDIST function in Excel to determine the probability that in any given year you will lose money by investing in this asset. (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.): Probability 32.46 %A fast food restaurant boasts that their mean wait time in the drive-thru line is less than 3 minutes. Does the restaurant's claim hold true if the average wait time for 125 drive-thru customers is 2.82 minutes? (Assume σ = 1.16.)