A random sample of 200 was selected to estimate the average amount of time retired folks in Arizona listened to the radio during the day. The sample mean was 110 minutes, and the standard deviation was 30 minutes. The 95% confidence limits for the population mean listening time are -_._) and (upper) limits. Record ONLY the lower limit to one decimal place (X.x).Using the data in the previous question, what is the Welch's critical t-value using the simplified textbook method and Tables when testing the claim that Fertilizer A is significantly greater than Fertilizer B? Record the answer to three decimal places (xxxx).Using the data from the previous question, what is the t-statistic rounded off to one decimal place ? (x.x)Two equal groups of seedlings, and equal in height, were selected for an experiment. One group of seedlings was fed Fertilizer A, and the other group with Fertilizer B. The mean heights of the two groups of seedlings, their standard deviations, and sample sizes are listed below. Assume simple random sampling, independence, and normally distributed data. Alpha = 0.025. Sample Mean Height (inches, Std Deviation (inches), Sample Size Fertilizer A 12.92, 0.25, 15 Fertilizer B 12.63, 0.20, 13 What is the null hypothesis? O mu1 > mu2 O mu1