Consider the following boundary-value problem: y"=2x²y + xy +2, 1≤x≤4. Taking h= 1, set up the set of equations required to solve the problem by the finite difference method in each of the following cases of boundary conditions: (a) y(1)=-1, y(4) = 4;
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- A research center claims that more than 29% of employees in a certain country have changed jobs in the past three years. In a random sample of 260 people from that country, 91 have changed jobs in the past three years. At α=0.10, is there enough evidence to support the center's claim? Complete parts (a) through (e) below.The manufacturer of a sports car claims that the fuel injection system lasts at least 48 months before it needs to be replaced. A consumer group does not believe this claim. The consumer group believes that it must be less than 48 months. The consumer group tests th the manufacturer's claim by surveying a random sample of 15 sports car owners who had the fuel injection system replaced. The ages of sports cars at the time of replacement were (in months) as follows: Assume that that the age of sports cars at the time of replacement is normally distributed. 29 42 49 48 53 46 30 51 42 52 38 47 50 34 52 Read part-a through part-f of this question fully and do them please. In your answers, please keep the appropriate number of decimals as requested in each part of the question. A. Compute the mean and the standard deviation of the above sample data. Be sure to find the appropriate standard deviation for purposes of carrying out the hypothesis test of interest. a. Sample…Are you an impulse shopper? A survey of 1000 grocery shoppers indicated that 24% of males and 57%of females make an impulse purchase every time they shop. Assume that the survey consisted of 500 males and 500 females. Complete parts (a) and (b) below. Question content area bottom Part 1 a. At the 0.01 level of significance, is there evidence of a difference in the proportion of males and females who make an impulse purchase every time they shop? Let group 1 be the males, and let group 2 be the females. State the null and alternative hypotheses. Choose the correct answer below. A. H0:π1≥π2 H1:π1<π2 BH0:π1≠π2 H1:π1=π2 C.H0:π1≤π2 H1:π1>π2 D.H0:π1=π2 H1:π1≠π2 E.H0:π1<π2 H1:π1≥π2 F.H0:π1>π2 H1:π1≤π2 Part 2 Calculate the test statistic. χ2STAT= (Round to three decimal places as needed.) Part 3 Determine the critical value. The critical value is - (Round to three decimal places as needed.) Part 4 State…
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- Data released by the Department of Education regarding the rate (percentage) of ninth-grade students who don't graduate in a certain year showed that, out of 50 states, 13 states had an increase in the dropout rate during the past 2 years.17 states had a dropout rate of at least 30% during the past 2 years.19 states had an increase in the dropout rate and/or a dropout rate of at least 30% during the past 2 years. (a) How many states had both a dropout rate of at least 30% and an increase in the dropout rate over the 2-year period? states(b) How many states had a dropout rate that was less than 30% but that had increased over the 2-year period? statesAn entomologist writes an article in a scientific journal that claims that fewer than 16 in ten thousand male fireflies are unable to produce light due to a genetic mutation. Use the parameter p, the true proportion of fireflies unable to produce light. A) H 0 : p > 0.0016 H 1: p ≤ 0.0016 B) H 0 : p = 0.0016 H 1: p > 0.0016 C) H 0 : p = 0.0016 H 1: p < 0.0016 D) H 0 : p < 0.0016 H 1: p ≥ 0.0016Data released by the Department of Education regarding the rate (percentage) of ninth-grade students who don't graduate in a certain year showed that, out of 50 states, 15 states had an increase in the dropout rate during the past 2 years.14 states had a dropout rate of at least 30% during the past 2 years.18 states had an increase in the dropout rate and/or a dropout rate of at least 30% during the past 2 years. (a) How many states had both a dropout rate of at least 30% and an increase in the dropout rate over the 2-year period?states(b) How many states had a dropout rate that was less than 30% but that had increased over the 2-year period?states
- Regarding the four conditions required for using the pooled t-procedures: a. what are they? b. how important is each condition?a. When John F. Kennedy was elected to the presidency, he received 49.72% of the68,838,000 votes cast. The collection of all of those votes is the population being considered.Is 49.72% a parameter or a statistic?b. Part (a) gives the total votes cast in the 1960 presidential election. Consider the total num-bers of votes cast in all presidential elections. Are those values discrete or continuous?c. What is the number of votes that Kennedy received when he was elected to the presidency?Which of the stochastic matrice in Exercise is regular?