Find two z values, one positive and one negative, that are equidistant from the mean so that the areas in the two tails total 4%. Use the Standard Normal Distribution Table and enter the answers rounded to 2 decimal places, separated by a comma if needed.A box is provided with a label "z =" for entering the values, along with options for input and reset. There are no graphs or diagrams present.

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Answered: Find two z values, one positive and one…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Aleks spins a 9 sided spinner 56 times. Each of the nine sides has a different colour on it. He records the number of times that he spins the colour purple. What values need to be determined in order to use a normal approximation? Determine these values.
Use the normal distribution of IQ scores , which has a mean of 90 and a standard deviation of 14, and the following table with the standard scores and percentiles for a normal distribution to find the indicated quantity. view the table: Standard Scores and Percentiles for a Normal Distribution (cumulative values from the left) Full data set Open in StatCrunch + Copy to Clipboard + Open in Excel + Standard score % Standard score % minus−3.0 0.13 0.1 53.98 minus−2.5 0.62 0.5 69.15 minus−2 2.28 0.9 81.59 minus−1.5 6.68 1 84.13 minus−1 15.87 1.5 93.32 minus−0.9 18.41 2 97.72 minus−0.5 30.85 2.5 99.38 minus−0.1 46.02 3 99.87 0 50.00 3.5 99.98 The percentage of scores between 62 and 118 is ________%. Round to two decimal places as needed.
Hayley has 120 apple trees of a certain variety in her orchard. She estimates the population of apples has a mean of 9 seeds per apple with a standard deviation of 2 seeds. The distribution in the number of seeds per apple has a shape that is approximately normal. The table gives the standard normal distribution. What percent of Hayley's apples have between 5 and 11 seeds? Enter your answer in the box rounded to the tenths place.
A normal distribution has a mean of µ-32 with a 4. What score separates the highest 40% of the distribution from the rest of the scores? Select one: O a. X-43 O b. X-42.67 Oc. X-33 O d. X-54.4
Use the table below to find the percentage of data items in a normal distribution that lie a. below and b. above a z-score of negative 1.00 −1.00.
Researchers wanted to determine if carpeted rooms contained more bacteria than uncarpeted rooms. To determine the amount of bacteria in a room, researchers pumped the air from the room over a Petri dish at the rate of 1 cubic foot per minute for eight carpeted rooms and eight uncarpeted rooms. Colonies of bacteria were allowed to form in the 16 Petri dishes. The results are given in the table below. Assume the distribution to be approximately normal. Do carpeted rooms have more bacteria than uncarpeted rooms? Carpeted Rooms Uncarpeted Rooms 11.7 12.0 8.2 8.3 7.1 3.8 13.1 7.3 10.6 12.0 10.1 11.1 14.8 10.3 14.0 13.7 What is the critical value(s) for this hypothesis test if group 1 is the carpeted rooms and group 2 is the uncarpeted rooms. 1.895 2.306 2.365 1.833 1.860
Find Pas, that is find 90 percentile of z-score from the standard normal distribution. 6.
Find the z-score boundaries that separate a normal distribution as described in each of the following. (4 points) The middle 36% from the 64% in the tails. The middle 60% from the 40% in the tails.
Exactly 95% of a normal distribution is located between z = +1.96 and z = -1.96. How much of the distribution is located in the tail beyond z = +1.96?
For each z score that follows, find the percentage of scores at that value or higher in the normal distribution: + 1.67 -2.02 + 0.08

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Find two z values, one positive and one negative, that are equidistant from the mean so that the areas in the two tails total 4%. Use OThe Standard Normal Distribution Table and enter the answers rounded to 2 decimal places, separated by a comma if needed.