Which histogram shows a standard deviation of roughly 5? 40 50 60 10 20 30 0 0 10 20 30 40 50 60 A OA OB OC OD 10 15 20 25 30 35 40 9 11 13 15 17 19 21 10 20 30 40 50 60 0 50 30 0 10 B D -5 10 25 40 55 70 85 -60 -40 -20 0 20 40 60

Q: For a certain wine, the mean pH (a measure of acidity) is supposed to be 3.50 with a known standard…

A: To calculate the power of the test, we need to find the probability of correctly rejecting the null…

Q: uppose Var(X) = 93, Var(Y) = 98, and X and Y are independent. What is Var(.6X + .4Y)?

A: Answer: - Given,  Var(X) = 93, Var(Y) = 98, and X and Y are independent.                 What is…

Q: A statistical program is recommended. You may need to use the appropriate technology to answer this…

A: Given data: Average monthly gas bill Age Square footage Rooms 70.2 16 2537 6 81.33 2 3457 8…

Q: A set of exam scores is normally distributed with a mean = 78 and standard deviation = 6. Use the…

A: empirical rule :   according to empirical  rule 68%,95% and 99.7% of the data fall within one, two…

Q: The arrows can only be dragged to z scores that are accurate to 1 place after the decimal point…

A: a) Sketch the region corresponding to the statement P(Z >0.7)

Q: Suppose a manufacturing plant produces light bulbs with a mean lifespan of 800 hours and a standard…

A: Suppose a manufacturing plant produces light bulbs with a mean lifespan of 800 hours and a standard…

Q: ran is training for her first marathon, and she wants to know if there is a significant ifference…

A: From the provided information, n1 = 34 n2 = 42 Xbar1= 41.7 Xbar2= 40.3 S1= 3.7 S2= 2.2 Significance…

Q: A manager at a store performed a study to determine the probability distribution for the number of…

A: The question is about discrete probability distribution Given :   To find : Mean of prob. dist. and…

Q: Nationally, the amount of debt from college student loans is exceeded only by mortgage debt and is a…

A: a) given that mean (µ) = 28045 , σ =3604 = p(x>25000) = p(z > 25000-280453604) = p(z>-0.84)…

Q: what is the probability that they will get all three rings?

A: 4) Since we are assuming that each ring is equally likely to land around the neck of any of the…

Q: Complete the following statements. The first quartile (Q1) corresponds to the percentile. The median…

A: The given statement is about percentile.

Q: A researcher develops a test for identifying intellectually gifted children. It has a μ=56 and σ=8.…

A: Given that.   X~N( μ , ?)   μ=56 , ?=8   Z-score =( x - μ )/?

Q: The following data gives the weights in Kg of a random sample of 44 students in a physics class. The…

A: Given information: Female weights Male weights 123 195 115 138 119 179 148 180 147 179…

Q: Find the area of the shaded region under the standard normal distribution to the left of the given…

A: We have to find the area to the left of P(z < 1.44)

Q: ? = 6; ? = 2 P(5 ≤ x ≤ 8)

A: Solution Let X is normal distribution

Q: If the p-value is more than the declared significance level for the hypothesis test, what is the…

A: First talk about p value and level of significance. The p value is the level of marginal…

Q: Use the data below in answering the tasks for PT2. Situation: A student conducted a survey on the…

A: The given data is Respondent Sex Age Vaccination Status 1 M 49 4 2 M 60 2 3 M 71 3 4  F…

Q: The University of Michigan is interested in determining if the performance of students in Advanced…

A: Given information: The data for the final grades of 15 students who attended classes online and for…

Q: This is wrong. Please check the population in region A. It is 56 051. Please recheck again. Thank…

A: Given data of five regions and their populations as shown below

Q: Suppose a university has 10,000 students, of which 55% are female and 45% are male. If 40% of the…

A:

Q: A certain company has been an authorized dealer for C&D marine radios for the past seven years.…

A: Here, we have the given the sales data of different quarters of different years.

Q: z scores that are accurate to 1 place after the decimal point (these values correspond to the tick…

A: Given that.   X~N( 0 , 1 )   μ=0 , ?=1 (for standard normal distribution)   Z-score =( x - μ )/?

Q: There is popular belief that herbal remedies such as Ginkgo Biloba and Ginseng may improve learning…

A: Given that, The sample size  n=36 The sample mean x¯=84 The population mean μ=80 The population…

Q: What is the test statistic and what is the critical value statistic?

A: we need to use a t-distribution since we have a small sample size (n = 10) and do not know the…

Q: The overhead reach distances of adult females are normally distributed with a mean of 195 cm and a…

A: Given that Mean =195  Standard deviation =8.6  We have to find a... Probability that an individual…

Q: The mean price for a pound of bananas is $0.57 with a standard deviation is $0.02. Assuming that the…

A: GIVEN DATA, mean :μ=0.57standard  deviation :σ=0.02normal distributionproce for a pound of bananas…

Q: A sack contains 30 red balls, 20 green balls, 10 blue balls and 5 yellow balls.  If we mix them…

A: Answer:- Given, A sack contains , number of red balls = 30 ; number of green balls = 20 ;  number of…

Q: The prices paid for a model of a new car are approximately normally distributed with a mean of…

A: We have given that Mean(µ) = 17000Standard deviations (σ) = 500X ~ N (µ, σ )= N(17000, 500)  Now, by…

Q: The scores on a test are normally distributed with a mean of 83 and a standard deviation of 4. Find…

A: given data, normal distributionμ=83σ=4p(80<X<90)=?

Q: A poll is given, showing 46% are in favor of a new building project. Let X be the number of people…

A: The question is about discrete prob. distribution Given : Prop. of people in favor of a new building…

Q: (a) Consider the following poisson mass function for the future lifetime of a newborn: -λ f₁(k) =…

A: “Since you have asked multiple questions, we will solve the 3 subparts of the first question for…

Q: For the following set of scores, what is the percentile for a score of 24?  22, 23, 19, 25, 26, 22,…

A: Given that data  22, 23, 19, 25, 26, 22, 19, 25,  22, 20, 21, 23, 23, 24, 18, 20,  22, 24, 21, 21,…

Q: Find the value of zα.   Z=0.16

A: We have given that α = 0.16

Q: Which of the following tests is used w doing a hypothesis test about the vari z-test O t-test…

A: We have given that,  Which of thr following test is used when  doing a hypothesis test ?

Q: The greek symbol show in this question refers to which type of error in hypothesis testing? * O Type…

A: Here the given symbol is.

Q: 7. Catholic and non-catholic students were randomly interviewed to determine whether or not they…

A: Given that: Observed frequency: Religion Response Catholic Non-catholic Total Favor 17 22 39…

Q: Determine the boxplot for the men's pulse rate data. OA. O C. 111 40 50 60 70 80 90 100110 O C. 184…

A: Given information: Men's Pulse Rates 60 61 69 70 60 87 86 75 78 76 87 53 88 67 66 55 82 60 73 78 53…

Q: A random survey of 500 students was conducted from a population of 2,300 students to estimate the…

A: We have given that,  Sample size (n) = 500 and Favorable cases(x) = 245 Then,  We will find the 90%…

Q: Find the mean of the data summarized in the given frequency distribution. Compare the computed mean…

A: Given Information: The frequency distribution is, Speed (miles per hour) Frequency 42-45 29…

Q: A set of exam scores are approximately normally distributed with mean = 71 and standard deviation =…

A:

Q: The heights of 10-year-old girls follow a normal distribution with a mean of 54 inches and a…

A: We have given information, Let X=The heights of 10-year-old girls The random variable X follows a…

Q: e mean annual cost for car insurance is normally distributed. For a used car, the mean annual cost…

A: Solution

Q: The following table provides a probability distribution for the random variable x. X = 8 16 24 f(x)…

A: Answer:- Given The probability distribution table for the random variable X is, x f(x) 8 0.25…

Q: Determine the mean (in students per computer) of the sampling distribution of the sample mean.…

A: Let X be the random variable for the number of students per computer for the 2007-2008 school year.…

Q: Do you believe that the advice given by physicians is effective? Why or why not?

A: Since in part (C)  The p-value is greater than level of significance. We Fail to reject null…

Q: Using the t tables, software, or a calculator, estimate the values asked for in parts (a) and (b) a)…

A: given data, we have to find out the ctitical value for the given data. here we use excel for find…

Q: A researcher is interested in measuring the memory recall of students. Twenty students were given…

A: Since you have posted question with multiple sub parts, we have provided the solution only to the…

Q: In a population of normally distributed data, the mean is 68 and the standard deviation is 12.75.…

A: given data normal distributionμ = 68σ = 12.75sample size (n) = 25P(70<x¯<75) = ?

Q: Construct a 95% and 99% confidence interval of the age of adults with at most 3 vaccine shots.…

A: The given data is Respondent Sex Age Vaccination Status 1 M 49 4 2 M 60 2 3 M 71 3 4  F…

Q: A researcher would like to determine whether any particular age group has a greater risk of…

A: First, we need to calculate the expected frequencies for each age group based on the population…