Why n-1 is used in the denominator for the variance for a normally distributed continuous RV

Q: In the entire population of a certain type of tree, the mean height of the trees is μ = 168.8 ft and…

A: The given mean is 168.8 and standard deviation is 43.6.

Q: If np greater than or equals 5 and nq greater than or equals 5 ​,estimate Upper P left parenthesis…

A: Given that n =13,p =0.6 p(x< 5 ) =?

Q: c) What is the probability that the person is firstborn and a Human Ecology student? (Round to three…

A: From the provided information, College 1 or Only 2 or more Total Arts & Sciences 40 24 64…

Q: Suppose that the amount of time that students spend studying in the library in one sitting is…

A: Given that mean 48 minutes and standard deviation 22 minutes and Number of student=18

Q: A genetic experiment with peas resulted in one sample of offspring that consisted of 435 green peas…

A: It is given that 435 green peas and 157 yellow peas.

Q: K The probability of flu symptoms for a person not receiving any treatment is 0.028. In a clinical…

A: Given and  Probability of success p=0.028 Number of trials n=1077

Q: A minority group (A) and a majority group (B) took the Fire Captain Examination.  It has been…

A: The question is about categorical data analysis Given : No. of people passed the test from group  A…

Q: 2) Consider a standard normal random variable X and Y~Exp(ß = 1). If W = 2Y and √2x √W' then a)…

A: Y~exp(β=1) Note: According to Bartleby guidelines expert solve only one question and maximum three…

Q: Use the sample data and confidence level given below to complete parts (a) through (d). K A research…

A: Given information We have given that; in the poll out of 929 respondents 582 said yes. Sample size…

Q: Consider the following data for two variables, x and y. x 22 24 26 30 35 40 y 13 20 33 34 40 35 (a)…

A:

Q: The average daily rate of a hotel in Canada as of August 2018 was $172.85. Assume the average daily…

A: GivenMean(μ)=172.85standard deviation(σ)=26.60

Q: A research report presents the results of the ANOVA as follows: F(2, 27) 5.36, p < .05. Based on…

A: Given: The result of ANOVA is given as; F(2,27)=5.36, p&lt;0.05 We need to conclude whether the…

Q: Genetics: A geneticist is studying two genes. Each gene can be either dominant or recessive. A…

A: Given Sample=100

Q: Let X ∼ N(2, 9). Compute P(X ≥

A: Given that  X ∼ N(2, 9) X~N( μ , ?2) μ= 2    , ?=3   Z-score =( x - μ )/?

Q: Direct Satellite Television It is believed that 25% of U.S. homes have a direct satellite television…

A: According to the given information in this question We need to find sample size

Q: You obtain 61.3% successes in a sample of size n₁ = 488 from the first population. You obtain 70.1%…

A: given data,α=0.05H0:p1 = p2Ha:p1&lt; p2n1=488n2 =…

Q: why not? wny 52. Foot Locker Store Productivity. Foot Locker uses sales per square foot as a measure…

A:

Q: Annual high temperatures in a certain location have been tracked for several years. Let X represent…

A: Given that data  x y 4 27.54 5 28.65 6 27.46 7 30.07 8 33.38 9 34.29 10 36.8 11…

Q: The probability distribution model of winning a gambling game is given as: $40 X P(X) 1 6 $0 5 36…

A:

Q: Medicare Hospital Insurance The average yearly Medicare Hospital Insurance benefit per person was…

A: The mean is 4064 and the standard deviation is 460.

Q: The following three independent random samples are obtained from three normally distributed…

A: Given that                   We have to find  Groups means  F statistic value  P value

Q: If you randomly select a professional basketball player, what is the probability that the player's…

A: The objective is to determine the probability that a randomly selected player's average points per…

Q: Given that X is a continuous random variable that has a uniform probability distribution, and 2.7 <…

A:

Q: Suppose a researcher is interested in determining the average length of gestation among pregnant…

A: given data  point estimate for standard deviation = σ = 14.25 95% ci for population mean.  interval…

Q: In an analysis of variance, df between is determined by counting the number of treatment conditions…

A: Analysis of variance (ANOVA) is a very useful statistical method that is used to test the difference…

Q: The following table is the quarterly seasonal indexes for the sales data of the Trending Trading…

A: Solution: According to the guidelines first question should be answered when there are multiple…

Q: A  =  {E2, E4} B  =  {E1, E3} C  =  {E1, E4, E5} P*A=0.4 P*B=0.4 P*C=0.6 P(A U B)=0.8 Find  AC.…

A: Solution-: Given:  A={E2,E4} B={E1,E3} C={E1,E4,E5} We want to find  (a) Ac=? (b) Cc=? (c) A∪Bc=?

Q: Question 22 ▼ < Assume that a procedure yields a binomial distribution with n = 678 trials and the…

A: We have given that,  Number of trials (n) =679 and probability of success (q) =0.13

Q: Compute the median for the following measurements: 182, 981, 623, 634, 9, 12942, 802

A: given data 182,981,623,634,9,12942,802arrange data in ascending order…

Q: More than 37% of people mind if others smoke near a building entrance. Express the null and…

A: claim : p&gt;37% we have to find null and alternative hypothesis in percentages.

Q: A publisher wants to estimate the length of time (in minutes) all adults spend reading newspapers.…

A: According to given question,   We have :-   data set 11, 9, 8, 10, 10, 9, 7, 11, 11, 7, 6, 9, 10, 8,…

Q: a recent court case it was found that during a period of 11 years 893 people were selected for grand…

A: Given n=893, p^=42%, p=81%

Q: What is the minimum sample size needed assuming that no prior information is​ available? n= ___…

A: It is given that  Margin of error, E = 5% = 0.05 Confidence interval = 95%

Q: A recent study indicated that 26% of the 170 women over age 55 in the study were widows. Round up…

A: Given that  Population proportion p=26%=0.26 Margin of error =E=0.05 95%.

Q: Direct Satellite Television It is believed that 25% of U.S. homes have a direct satellite television…

A: According to the given information in this question We need to find sample size

Q: Suppose you want to estimate the mean number of children desired by adults over the age of 25. A…

A: Here, mean is unknown and standard deviation is 1.81. Margin of error is 0.25.

Q: Given X = {0, 1} with X = 1 indicating disease. Given their status, a diagnostic test returns a…

A: Given information: Consider, the joint distribution for X and Y is,

Q: Assume that the traffic to the web site of Smiley’s People, Inc., which sells customized T-shirts,…

A: given data normal distributionμ = 4.54 millionσ = 880000 = 0.88 million

Q: 1. Complete the table and construct a histogram, frequency polygon and cumulative frequency polygon.

A: From given data we have : Class Limits  f 94-97 3 98-101 8 102-105 12 106-109 10…

Q: According to the most recent data, 10.6% of engineers (electrical, mechanical, civil, and…

A: Given  p=10.6%, n=75

Q: A coin flip: A fair coin is tossed three times. The outcomes of the three tosses are recorded. Round…

A: GivenA fair coin is tossed three times

Q: Allison's soccer penalty kick speeds vary uniformly between 57 and 78 miles per hour. Round answers…

A: As per bartleby policy I answered the a,b,c,e,f subparts

Q: 5. The time between requests to a web server is exponentially distributed with a mean of 0.61…

A:

Q: We got it, thanks! The number has to be below the notation and we had it next to it and not below in…

A: Given that A = {E2, E4} B = {E1, E3} C = {E1, E4, E5}  We have to find a...Ac b..Cc c ..P(AUBc)

Q: Annual high temperatures in a certain location have been tracked for several years. Let X represent…

A: Given that             We have to find    At the 0.05 significance level, does the data below show…

Q: (b) Sample size: Point estimate: 0 Sample standard deviation: Critical value: Compute 0.000 0.000…

A: It is given that the sample information. Here, need to find out the tabulated values for confidence…

Q: A somewhat outdated study indicates that the mean number of hours worked per week by software…

A:

Q: The following information has been supplied by the Sales department of an IT company in Dublin…

A: The values of sales for first, 2nd, 3rd and 4th quarter of 2012 are 110,121,133 and 107…

Q: The weekly television viewing time of children aged 2 – 11 years is normally distributed with a mean…

A:

Q: Find the standard deviation of a discrete random variable X which satisfies P(X=1)=0.1,P(X=-1)=0.6,…

A: