Many people believe that the average number of Facebook friends is 120. The population standard deviation is 39.2. A random sample of 47 high school students in a particular county revealed that the average number of Facebook friends was 145. At a = 0.01, is there sufficient evidence to conclude that the mean number of friends is greater than 120? Part 1 of 5 State the hypotheses and identify the claim with the correct hypothesis. Hotu = 120 not claim Hu> 120 claim This hypotheses test is a one-tailed ▼ test. Part: 1/5 Part 2 of 5 0.0 ▼ Find the critical value(s). Round the answer to two decimal places. If there is more than one critical value, separate them with commas. Critical value(s): X ▼ S

Q: survey by the National Retail Federation found that women spend on average R146.21 on a Saturday…

A: given data  normal distribution  μ = 146.21σ = 29.44P(x<160) = ?

Q: About 62% of people who are murdered knew the person who committed the murder. Suppose that…

A: From the provided information, About 62% of people who are murdered knew the person who committed…

Q: s=1.99

A: Hypotheses: H0:μ=7Ha:μ<7 This is a left-tailed test as the direction of alternative hypothesis is…

Q: Find the value of the test statistic. Find the p-value. (Round your answer to three decimal places.)…

A: Null Hypothesis: H0: There is no difference in the average ratings among the three products.…

Q: Choose the most appropriate answer. Write down the letter that represents the correct answer next to…

A: "Since you have posted a question with multiple subparts, we will solve first 3 sub-parts for you.…

Q: You believe the population of difference scores is normally distributed, but you do not know the…

A:

Q: Trisha has received the following grades this term: 75, 87, 90, 88, 79. If she wishes to earn an 85…

A: Given values: 75 87 90 88 79 Consider, the average value for above grades, SPSS Procedure: Enter…

Q: Suppose that Y₁, Y₂, ..., Y₁ is a random sample from a normal distribution with parameter mean 0 and…

A:

Q: You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe…

A: given data σ= 52.299% ci for μ.  E = 2.5n = ?

Q: b) Suppose that a random variable X has a probability density function given as (2(ß-x) 0 < x <B B²…

A:

Q: iii) What is the value of the sample size m, if P(|Ỹ — µỹ| ≥10) < 0.04?

A: First we have to determine the mean and variance of Y and then use Chebychev's inequality to get the…

Q: a) From the Statistics Canada dataset you have chosen, calculate the measures of central tendencies…

A: The given data set is displayed below.

Q: For the standard normal variable Z, find the probability P(3.58 < Z < 3.93): P(3.58< Z<3.93) =…

A: In question, Given that Z is a standard normal variable, then We'll find P(3.58 &lt; Z &lt; 3.93).…

Q: i) Find the sampling distribution of the statistic W = X₁ + 2X₂ X3 + X₁ + X5. ii) What is the value…

A:

Q: R3.1-R3.18. What design? Analyze the design of each research example reported. Is it a sample…

A: Given Information: Consider the given study.

Q: Using the following information select the number that better estimates the upper 90% confidence…

A: From given data we have : Observation Date xi 1 79 2 78 3 85 4 79 5 79 6 78 7 76…

Q: else i) Use an appropriate method to show that W = is a pivotal quantity. B ii) Construct a 90%…

A: A quantity is said to be pivotal quantity if it's distribution is free from parameter.

Q: Listed below are speeds​ (mi/h) measured from traffic on a busy highway. This simple random sample…

A: Obtain the 95% confidence interval estimate of the population standard deviation.   The 95%…

Q: You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based…

A: given data σ= 38.699% cii for μ. E =10n = ?

Q: The table lists the smoking habits of a group of college students. Sex Non-smoker Regular Smoker…

A: sex non smoker regular smoker heavy smoker total man 135 57 5 197 woman 187 21 12 220 total…

Q: 2. Data Set "Speed Dating" includes "attractive" ratings of male dates made by the female dates. The…

A:

Q: 6. The following histogram gives the times taken by a random sample of workers of a company to…

A: It is given that the histogram gives the time taken by a random sample of workers of a company to…

Q: At age 9, the average weight (21.3 kg) and the average height (124.5 cm) for both boys and girls are…

A:

Q: Let x = (x₁,...,xn) be a data set, and denote its sample standard deviation with sx. Let y₁ = ax; +…

A:

Q: 18. Use the information in Figure 2 below to answer questions 18 through to 22. The data in Figure 2…

A: Solution: From the given information,

Q: 2. The following data represent the height of plants using 4 different materials of pots after one…

A: Given the data represent the height of plants using 4 different materials of pots after one month in…

Q: Question 2 Suppose it is reported that 74 % of people subscribe to a cable or satellite television…

A: Given that  p = 74% = 0.74  n = 135

Q: a) Let 3,1,3,0,3,2,2,0, 1, 2 be ten independent observations from a binomial experiment of four…

A: X~Bin(n=4, β) Sample size=10

Q: Regression Example Suppose you want to predict your average HC/LO score across your next day of…

A: D. Given that the regression model is, b=C+Mt Here, b=output C and M are the coefficients of the…

Q: Calculate the approximate quantity relatives to two decimal places for the MTN and Cell C stocks…

A: Consider the following table: Stock Price p0 Qty q0 Price p1 Qty q1 p0q0 p0q1 p1q0…

Q: A major company would like to assess the impact of using a professional trainer to conduct a…

A: The given mean for control group is 17.5, and workshop is 22.7, the sample sizes are 8 for each.

Q: Espano Total blood cholesterol level was measured for each of 10 adults. Here are the 10…

A: Data given  218,174,239,201,260,218,262,251,223,201

Q: a) b) c) What is the parameter space of 8? Find the maximum likelihood estimator (MLE) of 0. What is…

A: It is given that the probability density function of X is f(x; θ) = { ( θ + 1 )•xθ,  0 &lt; x &lt; 1…

Q: a) Let 3,1,3,0,3, 2, 2, 0, 1, 2 be ten independent observations from a binomial experiment of four…

A: X~Bin(n=4, β) Sample size=10

Q: i) Show that the standard score of the sample mean X, is equal to Y. ii) Show that the mean and…

A: It is given that  X follows N(θ, 1), then E(X) = θ and V(X) = 1, And the moment genarating function…

Q: i) Find the sampling distribution of the statistic W = X₁ + 2X₂ - X3 + X₁ + X5. ii) What is the…

A:

Q: 2.5.5. Find the probability of the union of the events a < X₁ <b, -∞0 < X₂ <∞0, and -∞ < X₁ <∞, c<…

A:

Q: An experiment analyzes imperfection rates for two processes used to fabricate silicon wafers for…

A: Note: Since multiple subparts are posted, we are solving first three subparts for you. Kindly repost…

Q: The director of surgery at a local hospital is interested in understanding his unit’s costs. An…

A: Introduction: The partial regression analysis output is given for predicting the surgical unit cost,…

Q: 6.8 Given a normal distribution with = 30 and σ = 6, find a. the normal curve area to the right of a…

A: As per our guidelines we are suppose to answer only three sub parts. Given,Mean(μ)=30standard…

Q: Columbia Computer Maintenance (CCM) is a venture to establish a new service organization for the on-…

A: Given Information: Consider the given dataset:   Units Minutes 1 23 2 29 3 49 4 64 4 74…

Q: a) Let 3,1,3,0, 3, 2, 2, 0, 1, 2 be ten independent observations from a binomial experiment of four…

A: Given  X~Bin(n=4, β) Sample size=10

Q: 5. Consider the following frequency distribution of x-values: x: 5 10 20 25 f: 3 78 2 The mean of…

A: As per our guidelines we are suppose to answer only one question. X 5 10 20 25 f 3 7 8 2

Q: K The data show the chest size and weight of several bears. Find the regression equation, letting…

A: From the above data  The independent variable X is Chest size (niches)  The dependent variable Y is…

Q: Calculate approximately to 3 decimal places the composite quantity index for all three stocks for…

A: Consider the following table: Stock Price p0 Qty q0 Price p1 Qty q1 p0q0 p0q1 p1q0…

Q: I need an APA write up description of the descriptives of this data set  (EXAMPLE: “The total sample…

A: Statistics are broadly classified into two types. They are inferential statistic and descriptive…

Q: The timber harvests in a particular forest have decayed approximately exponentially from 403 million…

A:

Q: consider seven randomly selected men. Determine the probability that exactly 3 men renew their car…

A: It is given that  p = 40% = 0.4 n = 7 The pmf of Binomial distribution is  P( X = x ) =…

Q: Calculate the standard deviation and the co-efficient of variation respectively for the distribution…

A: standard deviation and the co-efficient of variation respectively for the distribution given in…

Q: 11:17 The following data represent the dividend yields (in percent) of a random sample of 28…

A: Given data…