DOC PREVIEW
SCF STA 2023 - Elementary Statistics Unit 2 Formative Guide

This preview shows page 1 out of 3 pages.

Save
View full document
View full document
Premium Document
Do you want full access? Go Premium and unlock all 3 pages.
Access to all documents
Download any document
Ad free experience
Premium Document
Do you want full access? Go Premium and unlock all 3 pages.
Access to all documents
Download any document
Ad free experience

Unformatted text preview:

Elementary Statistics Unit 2 Formative GuideElementary Statistics Unit 2 Formative Guide1) Which cannot be a probability? a) -1 b) 1 c) 0 d) .52) If a fair coin is flipped three times, what is the probability of getting a heads on the first toss and a tails on the second and third tosses? a) 3/6 b) 3/2 c) 1/8 d) 1/6 e) 3/83) If the probability of getting an event A is defined, what is the probability of not getting the event A called? a) sample space b) independent c) dependent d) exclusive e) complement4) If an automobile manufacturer makes ignition keys by making 8 cuts, any one of four levels deep, how many different keys can be made? a) 4096 b) 8 c) 500 d) 78125 e) 655365) The sum of the probabilities of a discrete random variable is always equal to a) 0 b) 100 c) 1 d) always different e) the probabilities6) The range a probability will fall within is a) 0 < P(x) < 1 b) -1 < P(x) < 1 c) 0 < P(x) < 100 d) always changes7) The result of a recent study on the side effects of using the Asthma medication Accolate showed that 45 people experienced digestive disorders. The sample size used for the study was n = 385. What is the probability that a randomly chosen person that uses Accolate for treatment of Asthma will experience digestive disorders? a) .1046 b) 8.55 c) .2715 d) .5388 e) .11698) The expected value of a discrete random variable is equal to its a) standard deviation b) variance c) median d) mean9) If a computer randomly selects the last digit of a telephone number, find the probability that it is odd or greater than 5. a) .7 b) .8 c) .9 d) 1 e) .6 f) .510) If one event is not effected by the occurrence of another, they are said to be a) dependent b) independent c) mutually exclusive d) deductive11) If random guesses are made on two true-false questions and three five-part multiple choice questions, what are the chances of getting them all correct? a) .002 b) .001 c) 200 d) .0004 e) .00512) Events that cannot occur at the same time are said to be a) deductive b) mutually exclusive c) independent d) dependentElementary Statistics Unit 2 Formative Guide 13) When the ordering of outcomes does matter, we are looking for1a) permutations b) combinations c) events d) occurrences14) A discrete random variable assigns ____________ to its inputs. a) percentages b) probabilities c) totals d) rates e) integers15) The list of all possible outcomes on an experiment is called the a) sample space b) random collection c) event space d) experiment space16) If you played a lottery and you had to pick 4 correct numbers out of a possible 24 numbers, what is your chance of winning if you play one time? a) .00002 b) 6 c) .000094 d) .003517) What is the probability of getting 7 girls in 9 births? (assume 50% chance of getting a girl on any given birth)a) .07 b) .11 c) .23 d) .77718) How many different ways can 6 people be arranged in 6 chairs?a) 40320 b) 120 c) 720 d) 72119) Given n=150 and p=.3, find the standard deviation of the binomial distribution.a) 50 b) 5.6 c) 45 d) 31.5Given the following discrete random variable, compute the mean and standard deviation. X P(x) 2 .005 3 .195 4 .7 5 .1________20) Mean _________ 21) standard deviation22) Sampling where every element in the population has an equally likely chance of being selected is called a) convenience b) probable c) empirical d) random23) If the probability of getting at least one broken egg in a carton of 12 is .33, what is the probability of not getting any broken egss? a) .33 b) .45 c) .67 d) .5Elementary Statistics Unit 2 Formative Guide24) The probability of getting heads on a single coin toss isa) .5 b) less than .5 c) more than .5 d) don’t know225) A local restaurant has found that 60% of its reservations are for nonsmoking tables, while 40% are for tables for smokers. Find the probability that 3 randomly selected reservations are all for nonsmoking tables.a) .216 b) .784 c) .064 d) .6026) A pollster must randomly select 3 of 12 available people. How many different groups of 3 are possible?a) 4 b) 36 c) 220 d) 132027) How many different batting line-ups are possible if a coach has 15 players on the team and 11 players are in the batting order? a) 65 b) 39916800 c) 5.44 E10 d) 136528) The probability of finding a broken cookie in a bag of chocolate chip cookies is P = .03. Find the probability of getting at least 2 broken cookies in a bag containing 36 cookies.a) .91 b) .294 c) .33 d) .06Circle T for true or F for false for the following statements.T F 29) A probability distribution gives the probability for each value of the random variable.T F 30) A discrete random variable has either a finite number of values or a countable number of values. T F 31) Arrangements or sequences where order does not matter are called permutations.T F 32) The Empirical approach to probability is when you run an experiment and check the outcome to estimate the probability of a similar experiment.T F 33) If a garage door opener has one set of 10 switches where the switches could be in one of three positions, a person could set all possible positions in less than ten minutes. (one position per second).T F 34) A person can be convicted at a legal trial exclusively on


View Full Document

SCF STA 2023 - Elementary Statistics Unit 2 Formative Guide

Download Elementary Statistics Unit 2 Formative Guide
Our administrator received your request to download this document. We will send you the file to your email shortly.
Loading Unlocking...
Login

Join to view Elementary Statistics Unit 2 Formative Guide and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Elementary Statistics Unit 2 Formative Guide 2 2 and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?