Q1/A/ Calculate the lower and the upper quartiles and the coefficient of skewness based on Karl Pearson's method from the following distribution of marks obtained by (49) students in a class. Class( Marks group) Frequency (No. of students) 5-10 5 10-15 6 15-20 15 20-25 10 25-30 30-35 35-40 40-45 4 2 2 5

Q: Use the table below to find the standard deviation of the following data set: 17,18,19,30,32,48

A: Given that  Data set : 17,18,19,30,32,48  Sum of data values = 17 + 18 + 19 + 30 + 32 + 48  = 164…

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A: Using the given table we have to Calculate the incidence rate of Lupus in men older than 45 years…

Q: C.I=16.3 ±1.96 * 5.322=16.3 ± 2.21= 14.09, 18.51  it is wrong.

A: Confidence interval is the range where the true value of parameter range. It is calculated by the…

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A: Given X-bar=17.5 Standard deviations=5.2 n=65

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A: We have given that x̅d = 3.1  sd = 9.4 nd = 10 Significance level (α) = 0.05 The null and…

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Q: Quit Smoking: The New England Journal of Medicine published the results of a double-blind,…

A: Given P value=0.04, level of significance ɑ=0.05=5%

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A: The given HSD value is 5.15 and the mean and sd values for each group are given.

Q: Stem Leaves 41 0123678 42 0135789 43 015679 44 006888 45 2237899 The value of the 26th percentile…

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Q: ou wish to test the following claim (Ha) at a significance level of α=0.005. For the context of this…

A: Given Information: Null Hypothesis H0:μd=0 Alternative Hypothesis Ha:μd>0 Sample size n=117…

Q: a) Carry out a t-test using five steps of hypothesis testing with the 0.05 level of significance at…

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Q: A sample of eight math SAT scores is given below:   650,650,520,680,600,740,610,570   Find the…

A: Data given 650,650,520,680,600,740,610,570

Q: A university class has 22 students: 6 are art majors, 4 are business majors, and 12 are psychology…

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Q: Q11 If the random variable x as a mean of μ and a variance of o² What is the P(x-μ)² <20)= a) less…

A: Chebyshev's inequality has used to find the probability.

Q: P(x <83) P(x <83) = (Round to four decimal places as needed.) ....

A: It is given that  Mean, μ = 90 Standard deviation, σ = 5 Z-Score, Z = ( X - μ )/σ

Q: Problem: Find the p-value if left-sided test, t-distribution, n = 45, Test Statistic = -2.5

A: Given Test is left tailed. n=45, test statistic=t=-2.5

Q: A researcher recorded the stopping distance for two types of cars at a speed of 100 km/h. The…

A: Given information: Midsize Car Compact Car 186 211 190 276 186 198 204 204 186 218…

Q: Find the p-value (decimal rounded to nearest 4 places) A company claimed that 75% of their…

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Q: Organize the data in a frequency distribution table. Represent the information using a suitable…

A: 1) Status of vaccination Frequency N 7 O 14 T 16 B 23

Q: May you please write clearer, i don't understand step b and c.

A: Probability is measured by the number of favorable items occurrence in an experiment. It is…

Q: Determine the critical value of a right tailed to arding a population at the oool level OF…

A: Given that  Right tailed test  Level of significance (α) = 0.01 The normal distribution graph is as…

Q: You wish to test the following claim (Ha) at a significance level of α=0.05. For the context of this…

A: Paired t test for differences has used  to test the given hypothesis.

Q: Since an instant replay system for tennis was introduced at a major tournament, men challenged 1386…

A: The question is about hypo. testing and confidence interval for difference between two popl. prop.…

Q: 29. Exam scores for an afternoon algebra class are: 99,56,78,55.5,…

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Q: 5. Using the same calculator find the value of Zo such that the following is true: ii) P(Z<ZO)=0.15…

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Q: 7. The ne idle loping problem as about 10 per cent of the Tigercats have an unstable fluctuating…

A: Given: Total cars n=100 Defect probability is 10%

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A: Test is that whether there is a relationship between jogging and blood pressure. Note : According to…

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Q: A card is drawn at random from a deck of 52 playing cards. Find the probability of the card drawing…

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Q: 1. a. b. The following table contains data on the relationship between savings and income: INCOME…

A: Given data: INCOME (per year) SAVINGS (per year) $15,000 $1,000 $0.00 -$500 $10,000 $500…

Q: hin 1 Distance o

A: Consumption of cigarette sticks for 30 Participants 4 10 4 7 8 7 8 7 9 3 6 2 3 9 9 4 10…

Q: In a small town in New York, we initiated a cohort study and followed 5,900 people for a mean…

A: Given that in a small town in New York, we initiated a cohort study and followed 5,900 people for a…

Q: 24. Twenty students, selected at random were asked to estimate the number of hours that they had…

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Q: Suppose that A and B are two independent events for which P(A)=0.23 and P(B)=0.65. Find each of the…

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Q: There are 7 acts in a talent show. An acrobat, a comedian, a juggler, a pianist, a singer, a…

A: Given: total number of act (n)=7

Q: mean of the sample means is ten and the computed values for the UCL and espectively. Below is the…

A: sample mean 1 9 2 11 3 6 4 12 5 9 6 11 7 7 8 8 9 12 10 16 11 6 12 13 13 12…

Q: a parabolic curve that would fit the following data. Let  y = a + bx + cx2. x      3    5     6…

A: For the given data, We have to fit second degree polynomial From equation of second degree…

Q: The time for a professor to grade a student`s homework in statistics is normally distributed with a…

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Q: A poll asked whether states should be allowed to conduct random drug tests on elected officials. Of…

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Q: Reuben is a human resources executive for a technology company. He is deciding between two types of…

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A: Attack rate: The ratio of a population at risk who develops the illness during a defined period of…

Q: Statistics show that tradition particular rural school distric school board would like to se year.…

A: Traditional statistics reveal that 65% of students in a particularly rural school district goes out…

Q: a) Construct the linear regression equation using the least square method. b) Based on the obtained…

A: Data is given to construct a linear regression

Q: required, round your answers to two decimal places. Provide a 90% confidence interval for the…

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Q: 1. a) Central Limit Theorem states that if the population is normally distributed, then no matter…

A: Here use central limit theorem  Central limit theorem  Central limit theorem states that when sample…

Q: A researcher asked 35 participants (N = 35) to rate their level of life satisfaction on a 7-point…

A: Given that :- A researcher asked 35 participants (N = 35) to rate their level of life satisfaction…

Q: 10. It has been lo ponents produced in a certain factory are de hundred is drawn from each day's…

A: A random sample of size one hundred is drawn; n=100 1% of electronic components are defective;…

Q: Prove that if p(x) is a monotonic increasing positive func- tion and M[p(X)] = = m exists, then P(X…

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Q: 3) The mean can be thought of as the balancing point of a distribution. According to this…

A: Here, mean can be considered as the balancing point of a distribution.  Mean is one of the most…