To test the effect of a new diet on weight loss, a cardiologist has all his patients follow the diet for 8 weeks. At the end of the 8-week period, eighty percent (80%) of the patients experienced statistically significant weight loss. The cardiologist concludes that the new diet is an effective treatment for losing weight, but his conclusion is questionable because the weight loss experienced by the patients may have been due to the placebo effect. In this one-track experiment, the explanatory variable and the placebo effect are     Confounded     Valid     Reliable     Stratified

Q: Where do you live? The U.S. Census Bureau computed the proportion of U.S. residents who lived in…

A: It is needed to check whether the proportions of people living in the various regions changed…

Q: x is a normally distributed random variable with mean 23 and standard deviation 7. What is the…

A: Mean(μ)=23 standard deviation(σ)=7

Q: A local health clinic surveys 50 patients about their water drinking habits. It found the data is…

A: n=50 Mean=62 Standard deviation=5.2 Confidence level=95%

Q: Normal approximation to estimate the probability of getting exactly 51 girls in 100 births. Assume…

A: Given, Both boys and girls are equally likely P(B) = 0.5 P(G) = 0.5 Sample size n = 100 By normal…

Q: Another measure of central tendency that is rarely used but is easy to calculate is the midrange. It…

A: Answer:- Given data table is,

Q: The following frequency table contains the total number of deaths worldwide as a result of…

A: Solution: We have given frequency table that contains the total number of deaths worldwide as a…

Q: The table shows the annual compensation of 40 randomly chosen CEOs (millions of dollars).   5.32…

A: Data : 5.32, 1.90, 23.67, 8.66, 14.01, 6.67, 3.14, 4.13, 192.46, 19.07, 26.40, 7.65, 12.11, 14.75,…

Q: List all outcomes of this experiment.

A: An experiment consists of rolling a pair of fair dice, one red and one green. An outcome is an…

Q: Five students taking a Business Statistics module at MANCOSA were asked to provide an example of a…

A: given  Student Variable Lungani The body temperature Nsika price of technology Thembekile…

Q: Jse normal approximation to estimate the probability of getting less than 47 girls in 100 births.…

A: n=100, p=1/2, q=1/2 μ=n×p=100×1/2=50 σ=√(n×p×q)=√(100×1/2×1/2)=5

Q: A matched-subjects study and an independent-measures study both produced a t statistic with df = 10.…

A: For t statistic with df=10 We have to find how many individuals participated in each study

Q: on an exam are Normally distributed with a mean of 343 and a standard deviation of 48. According to…

A: let x be the scores of students on an exam are normally distributed with a mean μ = 343. and…

Q: The number of pizzas consumed per month by university students is normally distributed with a mean…

A: normal distribution μ = 9σ = 2

Q: 4.    In one of Mendel’s early genetics experiments, he observed two traits on each of 556 garden…

A: Round Yellow      315Round Green      108Angular Yellow   101Angular Green    32

Q: A consumer products company is formulating a new shampoo and is interested in foam height (in…

A: Suppose the population mean height of foam is µ.

Q: A variable of a population has a mean of μ = 200 and a standard deviation of o = 42. a. The sampling…

A: It is given that for the specified population distribution, μ=200 and σ=42.  In order to answer…

Q: In Exercise 5.8, we derived the fact that { Show that Cov(Y₁, Y₂) = 0. Does it surprise you that…

A: We have to show that  Cov(y1,y2)=0 and it surprise that it is zero why or why not

Q: Five hundred consumers are surveyed about a new brand of snack food, Crunchicles. Their age group…

A: The table is given we need to answer the question by using the given values in the table   Since you…

Q: Random samples of resting heart rates are taken from two groups. Population 1 exercises regularly,…

A: Population 1: 65, 66, 72, 73, 70, 73, 69 Population 2: 72, 80, 73, 71, 76, 73, 75, 79 n1=7 n2=8

Q: Let the test statistic T have a t distribution when Ho is true. Give the P-value for each of the…

A: From the provided information, a) Ha: µ > µ0, df = 15, t = 2.864 b) Ha: µ < µ0, n = 24, t =…

Q: 2. We have n = 100 many random variables X;'s, where the Xi's are independent and identically…

A: It is stated that, the random variables Xi' s are iid Bernoulli random variables, i=1,2, ,.., 100 .…

Q: round to the nearest hundreths

A: MC(x) MC2(x2) 14 196 9 81 7 49 14 196 15 225 13 169 10 100 17 289 11 121 18 256…

Q: Grear Tire Company has produced a new tire with an estimated mean lifetime mileage of 36,500 miles,…

A: The normal distribution is given by,                           f(x) = e-12x - μσ22π ; 0 < x <…

Q: Divide the following and express the answer in four decimal places if necessary. a. 2 + 15 b. 3 + 20…

A: “Since you have posted multiple questions, we will provide the solutiononly to the first question as…

Q: The table to the right contains observed values and expected values in parentheses for two…

A: Given                      Y1          Y2          Y3 X1               32           40          50…

Q: CONDITIONAL AND MARGINAL PROBABILITY - Statistics and probability 1) Calculate the probability of…

A: The experiment is rolling a die. The event E is obtaining an even number The event B is obtaining a…

Q: Determine whether the data set is a population or a sample. Explain your reasoning. The age of each…

A: It is needed to define whether the given data set is a population or a sample.

Q: A school district wants to know how many students in the district have peanut allergies. Use a 90%…

A: Standard deviation=σ=9 Margin of error=E=0.8

Q: Given that X is a random variable having a Poisson(λ) distribution, compute the following:…

A: λ=6 X~Poisson(λ=6)

Q: ASSIMILATION At two-tailed graph, locate in the T-distribution table the entries for different…

A: The percentile is the measure which separates the entire data set into 100 parts in an equal way. It…

Q: Given that X is a random variable having a Poisson (A) distribution, compute the following: d) P(X <…

A: poisson distributionλ = 6P(x&lt;3) = ?

Q: how did you get the number 14 for the people that only enjoy acting thats not even possible

A: The number of people acting is 71, the number of people acting and crosswords is 20 , the number of…

Q: The following data represents the percentage of people without health insurance for a sample of the…

A: given People without insurance 8.6 10.6 13 15.5 18.1 19.4 22.2 9.2 10.9 13.3…

Q: 3. Let f be the density function of a random variable X, and let Y= (Y₁, Y2, Y3) be a continuous…

A: This question involves working with random variables and their density functions. Specifically, we…

Q: It has long been stated that the mean temperature of humans is 90.0 T.T ever, two less than 98.6°F.…

A: It has long been stated that the mean temperature of humans is μ=98.6 F. They measured the…

Q: Kim wants to determine a 95 percent confidence interval for the true proportion p of high school…

A: Margin of error =E =0.03

Q: The cumulative distribution function of the continuous uniform distribution between con- stants a…

A: a) The probability density function f(x) is the derivative of the cumulative distribution function…

Q: As player salaries have increased, the cost of attending baseball games has increased dramatically.…

A: For a grouped frequency distribution with continuous classes who's graphical representation is…

Q: What is the probability that more than 5 cars arrive within a two hour period?

A: Given that the number of cars that arrive at an inspection station within a time period of one hour…

Q: In a previous year, 56% of females aged 15 and older lived alone. A sociologist tests whether this…

A: X=214 n=400

Q: Below is my script for some problems I am doing in RStudio. How do I code to get the statistical…

A: Here is the code to get the statistical data that shows how the male tv hours differ to the female…

Q: Extra #2. For a fully discrete whole life insurance on 1000 on the select life [60] (a) Ultimate…

A: To calculate the net premium policy value at the end of year 5 for this insurance, we need to use a…

Q: The height of women ages 20-29 is normally distributed, with a mean of 64.4 inches. Assume o = 2.4…

A:

Q: (a) P(X 6) when A= 4.5 P(X= 6) = (b) P(X 9) when A = 5 P(X ≤9) = (c) P(X>6) when A = 3 P(X> 6) =

A: We know that, The probability mass function is,  P(X=x) = (e-λ×λx)/x!  Where,  λ &gt; 0  x = 0, 1,…

Q: The table gives the amount of money (in dollars) spent on football by a major university. Letting a…

A: The question is about regression Given :   To find : 1 ) Eq. of the line of best fit 2 ) Pred.…

Q: An investigation was carried out to study possible consequences of the high incidence of head…

A: The test is to check whether the means for Hopkins score are not the same for the three student…

Q: counting techniques and probability - Statistics and probability 1) A friend of mine is going to…

A: 8 Bottles of Zinfandel 10 bottles of merlot 12 bottles of cabernet

Q: For each problem, select the best response. (a) The P-value of a test of a null hypothesis is OA.…

A: Statistical test of significance: The test of significance is a procedure in that an analyst…

Q: am looking for assistance in solving part (d) and (e) of the attached problem.  Thank you in…

A: k=0.75 (from previous solution )

Q: A learn-to-type software program claims that it can improve your typing skills. To test the claim…

A: We make the following table for the difference from the given information  Typing Speeds (in Words…