The distribution of IQ scores of the population is normally distributed with a mean of 100 and a standard deviation of 15 for a particular data value. Since the population is normally distributed all sampling distributions will also be normally distributed. Find the z-scores for each of the following. Make sure to pay attention to the distribution you should use. Write exact answers as decimals. A single person with an IQ of 121: Z-score = 1.40 Mean of a sample of 4 IQ's is 121: Z-score = 2.80

Q: Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those…

A: given data, normal distribution , μ=100σ=15we have to find out the shaded region for the given…

Q: There are five people in a room, ages 10, 10, 15, 20 and 20. If the 15 year old leaves the room, the…

A:

Q: . Two groups of experimental rats were injected with tranquilizer at 1.0 ng dose and at 1.5 mg dose,…

A: Given : Alpha=0.01 Dosage A(1.0 mg) Dosage B(1.5mg) 9.8 12 13.2 7.4 11.2 9.8 9.5 11.5…

Q: You throw a ball as far as you can 5 times, recording the distance for each throw: 165 feet, 184…

A: since only 5 observation is given we will consider them as sample (n = 5)and population (N = 100)…

Q: Scores on a test have a mean of 86 and a standard deviation of 13. Jerrica has a score of 94.…

A:

Q: , calculate the z score

A: The z score ia defined as Z = (X - mean)/SD

Q: The weights of men in their 30s are normally distributed with a mean of 190 pounds and a standard…

A: From the provided information, Population mean (µ) = 190 pounds Population standard deviation (σ) =…

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A:

Q: A nutritionist wants to determine how much time nationally people spend eating and drinking Suppose…

A: According to the given information in this question, we need to answer part c

Q: For a group containing 100 observations, the arithmetic mean and the standard deviation 9 a nd-/1O5…

A: In the given situation, there are 100 observations. The arithmetic mean is 8 and the standard…

Q: Assume that the readings on the thermometers are normally distributed with a mean of 0° and standard…

A:

Q: Calculate the sample standard deviation for this data set: 65, 48, 70. The formula for the sample…

A:

Q: Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those…

A:

Q: sume that the readings on the themometers are normally distributed with a mean of 0" and standard…

A: We have find givan normal distribution...

Q: Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those…

A: normal distribution μ = 100σ = 15 P(85<x<110) = ?

Q: Assume that the readings on the thermometers are normally distributed with a mean of 0° and standard…

A:

Q: Below represents the amounts that a random sample of employees reported that they spent on dinner…

A:

Q: Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those…

A:

Q: 1. The average test score of entire school is 78 with standard deviation 10. A teacher took a random…

A: (1) Average or mean (μ) = 78 and standard deviation (σ) = 10 and sample size (n) = 75 Note:…

Q: e the table. Round values to the nearest tenth as needed. Midpoint x x-X (x-x)2 (x-x)?f 70.5 92.5…

A:

Q: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

A: We have given that.    X~N( 0 , 1 )    μ = 0    , ? = 1

Q: O E atistic is | (Round to two decimal places as needed.)

A: For medium lead level: sample size (n1) = 11 sample mean (x̄1) = Σx1 /n1 =999/11 = 90.82 sample…

Q: The amount of caffeine in a sample of five-ounce servings of brewed coffee is shown in the…

A: Solution:  The frequency distribution for the data is  f Midpoint x xf 2 70.5 141 10 92.5 925…

Q: We have provided simple data sets for you to practice the basics of finding measures of variation.…

A:

Q: The area of the shaded region is (Round to four decimal places as needed.)

A: mean = 100 standard deviation = 15

Q: The heights of adult women are normally distributed with a mean of 64.5 inches and a standard…

A: The question is about normal distributionGiven :Mean height of adult women (  ) = 64.5…

Q: .... The indicated IQ score, x, is (Round to one decimal place as needed.)

A:

Q: 5. These are the heights of randomly selected graduating undergraduate students in cm. 160 171 171…

A: Let X denotes the height of the students. Then, the mean, variance, and standard deviation are given…

Q: The middle 95% of a group of 1000 students got scores ranging from 50 to 90 on a math test. If the…

A: Normal Distribution: Understand the properties of the normal distribution, including the mean (μ)…

Q: The distribution of IQ scores of the population is normally distributed with a mean of 100 and a…

A: Given that  The data is normally distributed with  Mean (μ) = 100 Standard deviation (σ) = 15   We…

Q: The distances golf balls travel under laboratory testing conditions are normally distributed. The…

A:

Q: Mark went around the neighborhood collecting spare change for charity. The 7 families gave: $5.00 ,…

A: The spare change amount given by families for charity is:- $ 5.00 $ 4.00 $ 4.00 $ 6.00 $…

Q: Assume that the readings on the thermometers are normally distributed with a mean of 0" and standard…

A:

Q: me results of a certain medical test are normally distributed with a mean of 127 and a standard…

A: Given data,Mean μ=127sd     σ=12P(X>133)=?

Q: The average age of senators in the 108th Congress was 62 years. If the standard deviation was 12.5…

A: Solution: Let X be the age of senator. From the given information,

Q: Find the are of the shaded region. The graph depicts the iq scores of adults and those normally…

A:

Q: A California lake has been stocked with rainbow trout. These trout have an average length of 24…

A: Given Information: Mean μ=24 Standard deviation σ=3 Someone goes fishing and catches a trout that is…

Q: DECIMAL FORM: 15 17 18 19 20 21 22 23 24 P(X) 0.03 0.09 0.18 0.18 0.15 0.26 0.6 0.03 0.03

A: Formula used.  E(x)= ∑x×p(x) E(x2 )=∑x2 ×p(x) Var(x)=E(x2 ) - [E(x)]2

Q: Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest…

A: The formula for calculation of z – score is shown below                   z = (x – xbar)/sd where, x…

Q: You want to know the percentage of utility companies that earned revenue greater than 94 million…

A: Given Mean(μ)=60standard deviation(σ)=15

Q: 7. A group of fish specialists are trying to gain information about the population of trout in a…

A:

Q: A final exam in Seaturtle Research Studies has a mean of 78 and a standard deviation of 3. If 36…

A:

Q: The amount of caffeine in a sample of five-ounce servings of brewed coffee is shown in the…

A: