A study on the probable number of enrollees in a school the next school year based on their enrolment statistics in a school for a 5-year period. Descriptive research Correlational research Experimental Research Historical quantitative research Causal research

Q: 1. A manager states that the average number of days per year missed by the employees in his factory…

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A: Chi-square test statistic is given by, χ2= Σ(Oi-ei)2/ei Where Oi's are observed frequencies and ei's…

Q: Example 8.5 In a group of 200 university students, 140 are full-time (80 females and 60 males) stu-…

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Q: Number of planets in other star systems near to the Vulcan system 16 4 3 2 5 7 8 6 9 14 12 10 8 1

A: The number of planets in the 50 star system is shown using bar graph

Q: 6) The mean salary of 5 employees is $41800. The employee salaries have 2 modes: $33000 and $51500.…

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Q: Example 8.7 X is a registered contractor with the government. Recently, X has submitted his tender…

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Q: One researcher finds a 95% confidence interval for a prevalence of heart disease in a population as…

A: We have given that  95% confidence interval is  26.2 percent with margin of error 4.2 percent    90%…

Q: 2. Consider the following null and alternative hypothesis. Η : μ = 120 versus Ha: μ > 120 A random…

A: GivenThe null and alternative hypothesis isH0:μ=120Ha:μ>120sample size(n)=81sample…

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Q: A coffee shop claims that it takes 115 seconds, on average, to serve their customers coffee through…

A: A. It is important to take a random sample of the orders due to the following reason: 1. Random…

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Q: 5. A professor at a community college claims that a college algebra student can increase his or her…

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Q: The graduation rate from high school in a certain county is 76%. A school in that county wants to…

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Q: Complete the frequency distribution for the data.

A: here given data of age of 30 lottery winner  here using telly complete the frequency table

Q: Q2 Let the probability density function of a random variable Y be y, 0≤x≤1 f(y) = {2-y, -y, 1<x<2 0,…

A: List of formulae : Var(y) = E(y2) - E(y)2 Where ,   E(y2) = ∫yy2f(y)dy  E(y) = ∫yyf(y)dy

Q: The ages of a random sample of people who attended a recent soccer match are as follows: 23 12 37…

A: For the given data Find d. Provide an appropriate stem-and-leaf graph. What can you get from it?e.…

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Q: If two coins are tossed which is not a possible value of the random variable for the number of…

A: Given two coins are tossed

Q: QUESTION 4 Match the following examples should be one-tailed or two-tailed tests. A. One-tailed test…

A: One tailed test:A hypothesis test where the possibility of the effect is one directional either to…

Q: Suppose that at Elkhorn High School, the number of hours per week that seniors spend on homework is…

A: Given that  Population standard deviation =6.0 Population mean μ =18.6

Q: City 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Q 32.92 28.51 33.94 33.45 35.68 29.01 30.68…

A: Solution: As per the guidelines only first three sub parts should be answered.

Q: .   Predict the elongation for a weld with an oxygen content of 0.15% and a nitrogen content of…

A: (a)`We can see from the output that the fitted model is Elongation = 46.80 – 130.11 Oxygen – 807.1…

Q: he average number of words in a romance novel is 64,491 and the standard deviation is 17,283. Assume…

A: Let X be the random variable from normal distribution with mean (μ) = 64491 and standard deviation…

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A: Solution-: The confidence interval for the independent samples t is estimating Group of answer…

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A: Number of successes in sample = n × Point estimate.

Q: can be used to determine whether the sample data support the hypothesis that students show a higher…

A: For the given data Perform t-Test: Two-Sample Assuming Equal Variances

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Q: Find the value for each t. 1. n = 10 for the 90% confidence interval for the mean 2. n = 15 for…

A: Given1)n=10confidence interval = 90%

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Q: Xn form n Bernoulli trials with parameter p. Determine the condi- 9. Suppose that the random…

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Q: Consumer Awareness of Bank Services Offered Consumer 1 3 2 4 5 9 6 7 8 10 Before ad campaign 82 81…

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Q: showed that 64 were on time. An SRS of 100 flights by Happy Airlines showed that 80 were on time.…

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Q: In a test of ESP (extrasensory perception), Professor Bready looks at cards that are hidden from the…

A: It is given that p = 1/4=0.25 and n =100.

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Q: 1) Calculate the mean, median, mode, and standard deviation of the liters of alcohol consumption per…

A: Since, the question number is not specified, we'll be answering the first question only. Please…

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Q: A simple random sample of size n is drawn from a population that is known to be normally…

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Q: 4. A state executive claims that the average number of acres in western Pennsylvania state parks is…

A: As per our guidelines we are suppose to answer only one question4)Given data is…

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A: Given that  Mean=74 Standard deviation=19 Sample size=45 Note: According to bartleby experts…

Q: A fast-food restaurant attaches prize coupons to the cups used to serve large drinks. Seventy…

A: The fast-food restaurant attaches prize coupons to the cups.