The data below are yields for two different types of corn seed that were used on adjacent plots of land. Type_1      Type_2 2078         2009 1953         1974 2090         2025 2455         2442 2258         2146 2043         1952 2136         2123 1491         1499 Assume that the data are simple random samples and that the differences have a distribution that is approximately normal. In this​ example, μd is the mean value of the differences d for the population of all pairs of​ data, where each individual difference d is defined as the type 1 seed yield minus the type 2 seed yield. Construct a​ 95% confidence interval estimate of the difference between type 1 and type 2 yields. What does the confidence interval suggest about farmer​ Joe's claim that type 1 seed is better than type 2​ seed

The average American gets a haircut every 43 days. Is the average larger for college students? The data below shows the results of a survey of 11 college students asking them how many days elapse between haircuts. Assume that the distribution of the population is normal. 38, 37, 38, 45, 53, 55, 35, 37, 35, 41, 38 What can be concluded at the the α = 0.05 level of significance level of significance? For this study, we should use? Select an answer: t-test for a population mean?  z-test for a population mean?         The null and alternative hypotheses would be:              H0:H0?   p  or  μ  Select an answer > = ≠ ≤ < ≥                H1:H1?  μ  or p  Select an answer ≠ ≥ > ≤ = <         2. The test statistic ? t z  =  (please show your answer to 3 decimal places.)           The p-value = _______ (Please show your answer to 3 decimal places.)           The p-value is? > or  ≤  α      3.  Based on this, we should?? Select an answer reject ? accept ? or  fail to reject ?…

Listed below are systolic blood pressure measurements​ (mm Hg) taken from the right and left arms of the same woman. Assume that the paired sample data is a simple random sample and that the differences have a distribution that is approximately normal. Use a 0.05 significance level to test for a difference between the measurements from the two arms. What can be​ concluded?   Right arm 143 136 121 129 135   Left arm 167 171 189 139 142   In this​ example, μd is the mean value of the differences d for the population of all pairs of​ data, where each individual difference d is defined as the measurement from the right arm minus the measurement from the left arm. What are the null and alternative hypotheses for the hypothesis​ test?     A. H0​: μd≠0 H1​: μd>0   B. H0​: μd=0 H1​: μd<0   C. H0​: μd=0 H1​: μd≠0 Your answer is correct.   D. H0​: μd≠0 H1​: μd=0 Identify the test statistic.   t=nothing…

The life span of a certain wood cutting machine manufactured by a factory has a normal distribution with a guarantee that any machine that stars malfunctioning within 36 months of the purchase will be replaced by a new one. How many percentages of machines are expected to be replaced in the following cases? Mean of 60 months and variance of 64 months2 Mean of 45 months and variance of 36 months2 Mean of 75 months and variance of 16 months2