Calculating the z-score is the last step when evaluating a normal distribution curve. True O False

The time spent​ (in days) waiting for a heart transplant in two states for patients with type A+ blood can be approximated by a normal​ distribution, as shown in the graph to the right. Complete parts​ (a) and​ (b) below. u=122 o= 21.4   (a.) What is the shortest time spent waiting for a heart that would still place a patient in the top 25% of waiting​ times? _____ days (Round to two decimal places as​ needed.) (b.) What is the longest time spent waiting for a heart that would still place a patient in the bottom 20​% of waiting​ times? ______  days  (Round to two decimal places as needed.)

Assume the samples are random and independent, the populations are nomally distributed, and the population variances are equal. The table available below shows the prices (in dollars) for a sample of automobile batteries. The prices are classified according to battery type. At a = 0.10, is there enough evidence conclude that at least one mean battery price is different from the others? Complete parts (a) through (e) below. E Click the icon to view the battery cost data. (a) Let u1. P2. H3 represent the mean prices for the group size 35, 65, and 24/24F respectively. Identify the claim and state Ho and H. H Cost of batteries by type The claim is the V hypothesis. Group size 35 Group size 65 Group size 24/24F 101 111 121 124 D 146 173 182 278 124 140 141 89 (b) Find the critical value, Fo, and identify the rejection region. 90 79 84 The rejection region is F Fo, where Fo = (Round to two decimal places as needed.) (c) Find the test statistic F. Print Done F= (Round to two decimal places as…

When determining sample size what do you do if the sample proportion is unknown? What are the requirements for using a normal distribution as an approximation to a binomial distribution?