Mean= Variance= B Standard Deviation= 19 20 21 Find the mean, variance, and standard deviation of the distribution rounded to 4 decimal places. 22 23 P(z) 0.24 0.23 0.31 0.11 0.11 Approximately how many arrangements should the florist expect to deliver each week, rounded to the nearest whole number?

Suppose that the hemoglobin levels among healthy females are normally distributed with a mean of 14 g Research shows that exactly 95% of healthy . dL females have a hemoglobin level below 16.1 g . What is the standard deviation of the distribution of hemoglobin levels in healthy females? Carry your dL intermediate computations to at least four decimal places. Round your answer to at least two decimal places. X 5 acer Oll g dL Check of a tab esc 1 q a @ 2 © N W S # 3 e Q d $ 4 r L % 5 f t V 60 g & y O 7 b h U n G (50 8

A distribution of values is normal with a mean of 134 and a standard deviation of 71.4. Find P67, which is the score separating the bottom 67% from the top 33%. P67=_____ Enter your answer as a number accurate to 1 decimal place. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.

mis 1est. 20 Find the area of the shaded region. The graph depicts the standard normal distribution of bone density scores with mean 0 and standard deviation 1. 2-1.13 The area of the shaded region is. (Round to four decimal places as needed.) Enter your answer in the answer box. 4IVE 2877 2843 2810 2776 3085 3050 3015 2081 2946 2912 -0.5 3156 3121 3336 3300 3264 3228 3192 3446 3409 3372 -0.4 3557 3520 3483 3745 3707 3669 .3632 3594 -0.3 3821 3783 3859 4013 3974 3936 3897 4207 A168 4129 4090 4052 -0.2 4364 4325 4286 4247 4522 4483 4443 4404 -0.1 4602 4562 4681 4641 4840 4801 4761 4721 5000 4960 4920 4880 -0.0 NOTE Foraalus ofz balom349 te0.0001for the area hp

Suppose the weights of 3-month-old babies are normally distributed—baby boys with a mean of 14.2 pounds and a standard deviation of 1.9, and baby girls with a mean of 12.8 pounds and a standard deviation of 1.9. What proportion of 3-month-old baby girls will weigh between 12 and 13 pounds? (Round your answer to four decimal places.)   Answer:__________________     You may need to use the appropriate appendix table to answer this question.

Heights of boys in a high school are approximately normally distributed with a mean of 175 cm and a standard deviation of 5 cm. What is the first quartile (25%) of heights?  (Hint. you need to find the Z-score associated with 25th percentile from the table on page 410)   a. 165.8 cm   b. 169.6 cm   c. 171.7 cm   d. 173.5 cm   e. 181.0 cm

5. The You have a score of X = 75 on a statistics exam. The mean score for the class on the exam is µ = 70. Which of the following values for the standard deviation would give you the highest position within the class? a. o=5,b. o = 1, c. o = 10, d. o = 12 %3D

The lengths of pregnancies in a small rural village are normally distributed with a mean of 270.2 days and a standard deviation of 17.8 days.In what range would you expect to find the middle 98% of most pregnancies? Between_______  and__________ .Enter your answers as numbers. Your answers should be accurate to 1 decimal places.

An additional data value is added to a dataset. The new value is far below the rest of the data. The standard deviation will decrease when this new value is added into the dataset. True False Suppose a certain drug causes kidney problems in 10% of patients, and this drug is to be tested on 55 patients. Find the standard deviation for the number of patients who will experience kidney problems.  2.2249 5.5 5.0 2.345

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…