ANOVA
Q: When several women are not hired at the Telektronics Company, they do some research and find that am...
A: Given that randomly selecting 20 people from a large pool of applicants (30% of whom are women) i.e....
Q: Salaries of Governors Here are the salaries (in dollars) of the governors of 23 randomly selected st...
A: The class width calculated using, Class width = (max – min) / n where, max is the maximum value in...
Q: The median is a (choose the right alternative!): A) quartile b) percentile c) both a quartile and a ...
A: The second quartile, Q2, is the median. 50th percentile is the median.
Q: A standard deck of cards contains 52 cards. One card is selected from the deck. (a) Compute the prob...
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Q: In case of LSD, each row and each column should be a complet Column. Block. Row. Design
A: In the given question, we'll choose the correct option based on the nature of Latin Square Design.
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A: The range is the difference between maximum value and the minimum value. Mode is the value that occ...
Q: Under what condition below, the steady state EWMA chart is identical to MA chart (hint: meaning that...
A: Correct option : a) λ=2/(w+1)
Q: The is a measure of the strength of the linear relationship between two sets of variables. O Coeffic...
A: Explanation: Correlation of Correlation is defined as the measure of strength of linear relations...
Q: A manufacturer knows that their items have a normally distributed length, with a mean of 12.1 inches...
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Q: n =10; 2 x, = 67;2 x = 493; 2y; = 85; 2 x,y; =603 , find_ (x; – x)´ = ? Also, please i=1 find regres...
A: Given information: n=10 ∑Xi=67∑Xi2=493∑Yi=85∑XiYi=603
Q: A company that manufactures smartphones developed a new battery that has a longer life span than tha...
A: Let X denote the battery life, given that X follows normal distribution with mean 30 and standard de...
Q: The party store sell balloons in 9 different colors. In how many ways can you make a selection of 15...
A: Given, Number of balloons n=15 Different colors r=9 In how many ways can you make a selection of 15 ...
Q: 4. The data set below shows the amount of trash generated by ten households (in pounds per day). Ass...
A: Given,sample size(n)=10mean(x)=10.91standard deviation(s)=4.7365degrees of freedom(df)=n-1=10-1=9
Q: Can you find the mean and the standard deviation with this data?
A: Given: Data on Index finger length for female. Step-by-step procedure to obtain the mean and the sta...
Q: A large sports team claims that, on average, 14500 fans attend a game at their stadium. A company th...
A: INTRODUCTION: small sample test for population mean we have to test the null hypothesis H0 : μ = μ0...
Q: How does ANOVA decrease Type 1 error (vs. using t-tests) in a 1-factor design with 4 levels?
A: Type 1 error is that rejecting a true null hypothesis. Generally, there is a 5% chance to commit typ...
Q: Match each step on the left with the procedure at that step on the right. Step 1 2 6 7 Procedure a. ...
A: Step 1 Identify test type Step 2 Write null and alternative hypothesis Step 3 Calculate test statist...
Q: If a seed is planted, it has a 70% chance of growing into a healthy plant. If 11 seeds are planted, ...
A: Given: Probbaility (Grow)= 70% = 0.70 Probaility (Dont grow) = 1-0.70 =0.30 n = 11
Q: Students in a high school statistics class wanted to see if the distribution of the colors of a popu...
A: From the provided information, Test statistic = 12.59 The p value is 0.05.
Q: Phonics is an instructional method in which children are taught to connect sounds with letters or gr...
A: Given that, Point estimate = sample mean = x¯= 34.09 sample standard deviation = S = 23.13 sample s...
Q: HOW do I solve this? P(-0.34 <Z <2.06) in three decimal places. I keep forgetting how to s...
A: the PDF of normal distribution is = 1/σ * √2π * e ^ -(x-u)^2/ 2σ^2standard normal distribution is a ...
Q: Use the following information: n = 6 , Σ x = 16, Σ x2 = 72. Find the variance S2, standard deviation...
A: Given : n = 6 , Σ x = 16, Σ x2 = 72. Mean is calculated as : x¯=∑xn=166=2.6667 Mean = 2.6667 Sam...
Q: 21
A: 21. The unemployment rate in the state of alaska by month is given in the table below : Jan Feb M...
Q: Q2: Let f(x) = 2x e¬*“,x > 0 and Let Y = X².Find G(y)and g(y). %3D %3D
A:
Q: You wish to test the following claim (HA) at a significance level of a = 0.1. H.:µ > 52.6 HA:µ < 52....
A: As the population standard deviation is known, we will use the z test. The null and alternative hypo...
Q: Statistics Question
A: Table that shows the necessary calculations: x x−¯x (x−¯x)2 11 3 9 6 -2 4 10 2 4 6 ...
Q: 1. Determine the 15t™ percentile of the waiting times of the sample of café customers presented in t...
A: 1 Data is 7,8,8,9,9,9,9,9,10,10,10,11,12,14,14,15 n = 16 , k ( the percentile ) = 15% k ×n = 0.15...
Q: In market research, when populations of individuals or households are surveyed by mail questionnaire...
A: Given: The sample number of households are n1=n2=250. The number of responses for the Questionnaires...
Q: 8. Given IQ scores are approximately normally distributed with a mean of 100 and standard deviation ...
A: Since you have asked multiple question, we will solve the first question for you. If you want any sp...
Q: Twenty years ago, 52% of parents of children in high school felt it was a serious problem that high ...
A: The hypothesis tests, contain two hypothesis: null hypothesis and alternate hypothesis. The alternat...
Q: Test the claim that the mean GPA of night students is smaller than 2.2 at the 2% significance level....
A: From the provided information, Sample size (n) = 31 Sample mean (x̅) = 2.17 Population standard devi...
Q: According to phys.org, Black and Hispanic females are underrepresented in STEM programscompared to n...
A: Given that,sample one, x1 =12, n1 =300, p1= x1/n1=0.04n1*p1>5, 300*0.04> 5 => 12>5n1*(1-...
Q: Kindly answer items 5, 6 and 7. Please choose the correct option. Thank you.
A: 5. Given: μ=65 and σ=5. Now, using empirical rule, the z-value for 68% in both sides is z=1. Then,Lo...
Q: 8.1.11 Determine from the given parameters of the population and sample size. H and o; u= 62, o = 20...
A: Sampling is a process used in statistical analysis in which a predetermined number of observations a...
Q: 2. Find the area under the standard normal distribution for each. a. Between z = 1.10 and z = -1.80 ...
A: As per our guidelines we are suppose to answer first question.Required probability is P(-1.80<Z&l...
Q: Use t3 I calculator.
A: To test:H0:p1=p2H1:p1<p2
Q: Construct a categorical frequency distribution for the data. Class Frequency Caramel Hazelnut Mocha ...
A: It is given that C-caramel, H-Hazelnut, M-Mocha, P-plain and V-Vanilla.
Q: A consumer products company wishes to test at the 0.05 significance level whether its newly reformul...
A: Given that : μ = 439σ = 25n = 57
Q: Compute a one-way ANOVA on the following data using 0.05 significance level. Group A Group B ...
A: ANOVA: ANOVA is useful method to check the Significance difference between 3 or more than 3 group me...
Q: 2. Students may be interested in whether the cost of a TI-84 plus calculator varies from store to st...
A: Given , n = 40 , s = 12
Q: then P(X<6)%3D
A: A discrete random variable is defined as a variable that takes particular values which are either fi...
Q: You sample 33 people to see if they own a dog, and find that 42% of them (rounded) do own a dog. Wha...
A: The random variable X follows binomial distribution. X ~ B (n, p) = > X ~ B (33, 0.42). We have t...
Q: Normal distribution #5 and #6
A: Given data; Mean = 104 Standard deviation = 14, Here, population is normally distributed X~ N(104,...
Q: Assume that a sample is used to estimate a population proportion μμ. Find the margin of error M.E. t...
A: Given data,n=83x=72.3σ=7.3z-value at 90% CI is Zc=1.645
Q: Please Asap, and correct
A: From the provided information, The probability distribution function is as follow:
Q: 26
A: The formula of weighted mean: Weighted mean=∑w*X∑w
Q: The district manager of four different restaurants wanted to investigate whether the four restaurant...
A: It is given that the p-value is 0.092 and the level of significance is 0.05.
Q: The times it takes students to finish an exam is normally distributed, with a mean of 85minutes, and...
A: Given dataμ=85σ=18
Q: Suppose that 20% of all M&Ms are yellow. We will choose a random sample of 11 M&Ms from thi...
A: Let x follows binomial distribution with parameters n = 11 and p = 0.20 The pdf of binomial distri...
Q: a survey is conducted about 15% of the people have hearing trouble in texas. a sample of 111 people,...
A: Given data, p15%=0.15 n=111 P(p<0.09)=?
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- Olympic Pole Vault The graph in Figure 7 indicates that in recent years the winning Olympic men’s pole vault height has fallen below the value predicted by the regression line in Example 2. This might have occurred because when the pole vault was a new event there was much room for improvement in vaulters’ performances, whereas now even the best training can produce only incremental advances. Let’s see whether concentrating on more recent results gives a better predictor of future records. (a) Use the data in Table 2 (page 176) to complete the table of winning pole vault heights shown in the margin. (Note that we are using x=0 to correspond to the year 1972, where this restricted data set begins.) (b) Find the regression line for the data in part ‚(a). (c) Plot the data and the regression line on the same axes. Does the regression line seem to provide a good model for the data? (d) What does the regression line predict as the winning pole vault height for the 2012 Olympics? Compare this predicted value to the actual 2012 winning height of 5.97 m, as described on page 177. Has this new regression line provided a better prediction than the line in Example 2?What does the y -intercept on the graph of a logistic equation correspond to for a population modeled by that equation?Question 3. Answer “YES “ or “No” to the following questions a. In ANOVA completely randomized design if you have more than two missing values, Analysis Toolpak in EXCEL will calculate F.YESNO b. In ANOVA you cannot use log transformed values if there are “zeros” in the data YESNo c. In ANOVA correction term can be larger than ƩY2 YESNO d. In ANOVA , my calculated F value was – 23.4. This is perfectly OK.YESNO e. In ANOVA, my raw data was multiplicative and so I log-transformed them and it became additive. Is this procedure correct? YESNO
- QUESTION 3 Which of the following can cause OLS estimators to be biased? Explain each of the following points: Heteroscedasticity Omitting an important variable A sample correlation coefficient of 0.95 between two independent variables both included in the model.Question 12: Spam: A researcher reported that 71.8% of all email sent in a recent month was spam. A system manager at a large corporation believes that the percentage at his company may be 68% . He examines a random sample of 500 emails received at an email server, and finds that 361 of the messages are spam. Can you conclude that the percentage of emails that are spam is greater than 68%? Use both a=0.10 and a=0.01 levels of significance and the P-value method with the TI-84 Plus calculator. Part 1: State the appropriate null and alternate hypotheses. H0: H1: This hypothesis test is a (BLANK) test. Part 2: Compute the value of the test statistic. Round the answer to at least two decimal places. z=(BLANK) Part 3: Compute the P-value. Round the answer to at least four decimal places. P-value: (BLANK) Part 4: (d) Determine whether to reject H0. At the a=0.10 level, ▼(Choose one) the null hypothesis H0. At the a=0.01 level, ▼(Choose one) the null hypothesis H0. Part 5:…Question 4 Multi-Server QueueA supermarket manager is trying to decide how many cashers to employ for the peak time. The service times for check outs are exponentially distributed with a mean service time of 3 minutes. Customer arrivals to cashiers follow a Poisson arrival process with an average 110 customers per hour.a. What is the minimum number of cashers that would be needed to have the utilization less than one?b. If the waiting time is too long, customers might leave the store or even do not enter the store. It is estimated that for every minute of waiting time, the supermarket loses a potential profit of 50 HKD every hour from lost sales. The hourly wage for a casher is 80 HKD / hour. How many cashers should the supermarket employ to maximize its profit? (Keep four decimal places.
- QUESTION 12 Historically, the proportion of people who trade in their old car to a car dealer when purchasing a new car is 48%. Over the previous 6 months, in a sample of 115 new-car buyers, 46 have traded in their old car. To determine (at the 10% level of significance) whether the proportion of new-car buyers that trade in their old car has statistically significantly decreased, what can you conclude concerning the null hypothesis? Reject the null hypothesis Fail to reject the null hypothesisquestion 4 Chen et al. (2000) examined the foraging behaviour of northern elephant seals (Mirounga angustirostris) that breed along the west coast of Mexico and the USA. They attached platform satellite transmitter terminals (PTTs) to 22 male seals and recorded, for each seal, the distance (km) to its main feeding area offshore and the amount of time (days) it spent at the feeding area. The results are presented below: What two null hypotheses are being tested with the output shown above? What statistical conclusions would you draw about these hypotheses? Complete the regression equation by filling in the blanks (to the nearest 3 decimal places). duration = + * distance What is one biological interpretation of this relationship between duration and distance ? What % of the variation in duration at main feeding area was explained by distance to feeding area?QUESTION 11 An educator estimates that the dropout rate for seniors at high schools in Colorado is 15%. Last year in a random sample of 300 Colorado seniors, 34 withdrew from school. At α = 0.10 level of significance, is there enough evidence to reject the educator’s claim? Yes, because the p-value is 0.075 Yes, because the z-statistic is 1.6 No, because the p-value is 0.038 Yes, because the p-value is larger than 0.15
