Question 1

The weight of Red Brocket deer is normally distributed with a mean of 21 kg, and a standard deviation of 3 kg. One deer is selected at random. Find the probability that it weighs less than 15 kg

a. 0.0228

b. -1

c. 0.9772

d. 15/21 = 0.71

Question 2

The drug Ziac is used to treat hypertension. In a clinical test, 14 out of 221 Ziac users experienced dizziness as a side effect. Find a 98% confidence interval estimate for the true percentage of all Ziac users who experience dizziness. a. -0.027

b. 0.025

c.0.009

d.0.004

Question 3

A researcher wants to determine p, the proportion of all blue back crabs that are left-handed.Assume that there is no available information that could be used as an estimate of phat. How many crabs must be surveyed so that the sample proportion has a margin of error of 0.05 with 95% confidence?

a.385

b.383

c.1068

d.1067

Question 4

Use theChi-Square distribution table (Table A-4) to find the critical values Chi²_Land Chi²_Rthat correspond to a confidence level of (1-alpha)=99%and sample size, n=41.

a.Chi²_L=22.164 Chi²_R=63.691

b.Chi²_L=20.707 Chi²_R=66.766

c.Chi²_L=27.991 Chi²_R=79.490

d.Chi²_L=24.433 Chi²_R=59.342

Question 5

Use the Standard Normal distribution table (Table A-2) to find the critical value (z alpha/2)that corresponds a confidence level of 98% a.0.5160

b.3.5

c.2.325

d.0.8315