Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 19. Use the empirical rule to determine the following. (a) What percentage of people has an IQ score between 81 and 119? (b) What percentage of people has an IQ score less than 43 or greater than 157? (c) What percentage of people has an IQ score greater than 119? (a)% (Type an integer or a decimal.)

Q: Use the​ side-by-side boxplots shown to complete parts​ (a) through​ (e).   Two stacked horizontal…

A: Hint: Box plot tell us about various features of data such as outliers, quartiles, median, kurtosis,…

Q: Define mean absolute percent deviation?

A: The question is about error in forecasting  Introduction : There are following types of error in…

Q: n each of the following equations, solve to find the value of x. a) If 2x=82x=8 then x=x=  b) If…

A: Equations are solved using various method. There are three different solving equation methods are…

Q: The following is a partial relative frequency distribution of consumer preferences for four…

A: Introduction In the given scenario, two tables of frequency distribution show the consumer…

Q: In an effort to understand the feelings of American adults about the government, one thousand…

A: Given that:  When a random sample of 1000 American adults, i.e., n=1000, was asked if they approved…

Q: A random sample of 15 college students were asked​ "How many hours per week typically do you work…

A: we will form the frequency table of the given data after arranging them into ascending order

Q: Three associations are described below. In each case, indicate: (a) Whether the statement implies…

A: Introduction  The association helps in determining whether the two variables are related or not.…

Q: A pediatrician keeps some basic health information about all his patients. Here are four of the…

A: We know There are 4 types of variables Nominal Ordinal Interval Ratio

Q: Tara McCoy is the office administrator for the Departmentof Management at State University. The…

A: Given The data is as follows: Average lead time, L¯=2 Standard deviation of lead time, σLT=0.5…

Q: If the standard deviation of a variable is 4​, what is the​ variance?   ​(This is a reading…

A: Given information: The standard deviation of the variable is 4.

Q: elow are two scenarios.  One exhibits sampling bias, and one exhibits wording bias.  Identify the…

A: When a bias in the sampling that essentially influences the response due to ill-formed words may be…

Q: table below, the average number of chocolate ch products. Assume the population of the number of…

A: Given: For Brand A Sample meanx¯1=6.4Sample size(n1)=10Sample stanard deviation(s1)=1.1 For Brand B…

Q: Identify the kind of sample that is described. A salary committee for a Midwestern college sends an…

A:

Q: The following linear hypothesis can be tested using the F-test with the exception of: a. b. C. d.…

A: Given that         a) H0:b1b2=1 and b3b4=0         b) H0:b1+b2=1 and b2=1b4 which can be written as…

Q: Use the round-trip airfare table below to determine the percentile rank of $1,133 Round-Trip Airfare…

A: The objective is to determine the percentile rank of $1,133

Q: Suppose you are the president of the student government. You wish to conduct a survey to determine…

A: Given: The administration provides us with a list of names and phone numbers of 731 registered…

Q: solve the second question please , last question in the picture

A: Hint: Use the Conditional Probability theorem as; P(A|B)=PA∩BP(B)

Q: Risk and odds ratios 7/7: What do you conclude from the relative risk and odds ratio?

A: Of the 1518 randomly chosen immobilized patients given fragmin 42 experienced complications. I.e.…

Q: Another way of thinking about variability is as the _____ the distribution. a. difference betewwen…

A: Variability: It may be defined as the difference in the observation in a distribution. In…

Q: 120 psychology students took a standardized test. The scores are summarized in the GFDT below.…

A: Given: Scores Frequency 180 - 199 12 200 - 219 13 220 - 239 15 240 - 259 15 260 - 279…

Q: Can eating a yogurt a day cause people to lose weight (as compared to not eating yogurt)? In a study…

A: Introduction Statistics is a discipline which involves collection of the data, organizing and…

Q: The following data represent the miles per gallon for a particular make and model car for six…

A:

Q: ear.

A: A pie chart demonstrates the distribution of a total quantity across  levels of a categorical…

Q: Define the different components (y, x, a, and b) of a linearregression equation.

A: Introduction The regression shows the relationship between one dependent variable and one or more…

Q: In the last presidential election, a national survey company claimed that no more than 50% (i.e., ≤…

A: given data n = 400 x = 202 claim : p ≤0.50p^=xn=202400=0.505

Q: Given the following data in measuring a distance of a certain line. DISTANCE 740.53 740.59 740.57…

A: Given data: Distance No. of Measurements 740.53 4 740.59 3 740.57 6 740.53 7 Total 20…

Q: Complete the histogram for the x data below. Assume the possible x values range from 0 to 5. The…

A: The possible x values are 0 to 5.

Q: We would like to compare the effectiveness of the three treatments in preventing relapse. Which of…

A: As we have to compare the effectiveness of three treatments in preventing relapse, whether they are…

Q: # of Siblings Frequency Relative Frequency Cumulative Frequency 0 34 0.1545 34 1 58 0.2636 92 2 40…

A: From the provided information, # of Siblings Frequency Relative frequency Cumulative…

Q: Determine the magnitude of the vector difference V¹ = V₂ - V₁ and the angle 0x which V' makes with…

A: Here,

Q: About 5% of a stores customers respond to advertised sales. The other 95% shop when they have time…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: following two-way table. Female Male Total 10 42 7 19 45 108 In a relationship 32 It's complicated…

A: female male total in relationship 32 10 42 its complicated 12 7 19 single 63 45 108…

Q: Q 2 D please

A: Quantitative variable are numerical variable. It mostly used the single variable to make descriptive…

Q: 340 1390 2150 1300 270 1710 1850 2130 1770

A: Hi! Thank you for the question, As per the honour code, we are allowed to answer three sub-parts at…

Q: Scores 82 90 93 63 77 Compute the mean and the standard deviation

A: Scores 82 90 93 63 77

Q: You are dealt one card from a standard​ 52-card deck. Find the probability of being dealt the king…

A: Introduction: It is required to find the probability of obtaining the king of hearts, when dealt…

Q: Deep Water Financial of Duluth, Minnesota, has asked you to evaluate the stock price growth for a…

A: Deep Water Financial of Duluth, Minnesota, has asked you to evaluate the stock price growth for a…

Q: A sample of n = 5 scores has Σ X = 20 and Σ X2 = 180. For this sample, what is the value of the…

A:

Q: A student entering a doctoral program in educational psychology is required to select three courses…

A: Given: The list of courses is: EPR 695  EPR 654 EPR 646 EPR 699 EPR 668

Q: The joint PDF of two RVs X and Y is given by 11 marginal PDFs of X and Y. Are X and Y statistically…

A: The given pdf is f(x,y)=516x2y,   0<y<x<20,              otherwise

Q: Photoresist is a light-sensitive material applied to semiconductor wafers so that the circuit…

A: Given: Sample size n = 8 Significance level α = 0.05 Formula  Used: Test-statistic t =…

Q: The U.S. Geological Survey compiled historical data about Old Faithful Geyser (Yellowstone National…

A:

Q: Time left 0:24:11 The item refers to the Table below which shows the scores obtained by ten students…

A:

Q: "A look at the descriptive statistics for males and females show that male scores generally fall…

A: The statement that is WITHOUT DOUBT correct is ' the variance for females is larger  than the…

Q: Explain coefficient of determination?

A: In the regression equation, the dependent variable is interpreted to be best estimated through one…

Q: The defect length of a corrosion defect in a pressurized steel pipe is normally distributed with…

A: Concept: Z is known as Standard normal variable Z=(X-mean)/standard deviation Note: According to…

Q: For a standardized normal distribution, calculate the probabilities below a. P(Z < 1.3) b. P(z≥…

A: The random z value in a standard normal curve (i.e., distributed with mean 0 and standard deviation…

Q: Use the degree of confidence interval and sample data to find the confidence interval of the…

A: Given: a) Heights of women: 95% CI n=50x=63.4s=2.4 b) Heights of women: 85% CI n=50x=63.4s=2.4 c)…

Q: Among fatal plane crashes that occurred during the past 50 years, 490 were due to pilot error, 77…

A:

Q: The number of chocolate chips in a bag of chocolate chip cookies is approximately normally…

A: Introduction: Denote the random variable, Denote X as the number of chocolate chip cookies in a…