25) A 20% of college of engineering students prefer white cell phones. What is the approximate...
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25) A 20% of college of engineering students prefer white cell
phones. What is the approximate...
3. There are 20 black cell phones and 30 white cell phones in a store. An...
3. There are 20 black cell phones and 30 white cell phones in a store. An employee t phones at random. Find the probability that (a) there will be exactly 4 black cell phones among the chosen phones; (b) there will be less than 3 black cell phones among the chosen phones.
1) If 20% of the residents in a U.S. city prefer a white telephone over any...
1) If 20% of the residents in a U.S. city prefer a white telephone over any other color available, what is the probability that among the next 1000 telephones installed in that city (a) between 170 and 185 inclusive will be white? (b) at least 210 but not more than 225 will be white? 2) The serum cholesterol level X in 14-year-old boys has approximately a normal distribution with mean 170 and standard deviation 30. (a) Find the probability that...
A statistics student at a New York State community college, randomly samples 900 students who own...
A statistics student at a New York State community college, randomly samples 900 students who own cell phones to determine if they play games on their phones. 75% stated that they use their mobile phones to play games. Using this information, then: construct a 90% confidence interval (to 4 decimal places) for the population proportion, p, of NYS community college cell phone users who play games on their phones. construct a 99% confidence interval (to 4 decimal places) for the...
25% of all college students major in STEM (Science, Technology, Engineering, and Math). If 33 college...
25% of all college students major in STEM (Science, Technology, Engineering, and Math). If 33 college students are randomly selected, find the probability that a. Exactly 9 of them major in STEM. b. At most 10 of them major in STEM. c. At least 7 of them major in STEM. d. Between 5 and 10 (including 5 and 10) of them major in STEM.
25% of all college students major in STEM (Science, Technology, Engineering, and Math). If 33 college students are randomly selected, find the probability that a. Exactly 9 of them major in STEM. b. A...
25% of all college students major in STEM (Science, Technology, Engineering, and Math). If 33 college students are randomly selected, find the probability that a. Exactly 9 of them major in STEM. b. At most 10 of them major in STEM. c. At least 7 of them major in STEM. d. Between 5 and 10 (including 5 and 10) of them major in STEM.
5. (20 pts) Suppose on a given college campus 45% of the students own an iPhone,...
5. (20 pts) Suppose on a given college campus 45% of the students own an iPhone, 50% an Android smartphone and 5% some other type of phone. Let X=the number of students in a simple random sample of 15 students who own an iPhone. A. What is the probability distribution of X? Note: If this is a well-known distribution it is sufficient to name the distribution and identify the value of the parameters B. Find the probability that 8 students...
A study by Allstate Insurance Co. finds that 82% of teenagers have used cell phones while...
A study by Allstate Insurance Co. finds that 82% of teenagers have used cell phones while driving (The Wall StreetJournal May 5. 2010). In October 2010, Massachusetts enacted a law that forbids cell phone use by drivers under the age of 18. A policy analyst would like to determine whether the law has decreased the proportion of drivers under the age of 18 who use a cell phone. (Y u may f1nd It useful to reference the opproprlete table: z...
help with 20 & 21 19. Data indicates that 60% of college students are female. If...
help with 20 & 21
19. Data indicates that 60% of college students are female. If you randomly choose a students for a committee what is the probability that you will have exactly 6 females on the committee? (Use Binomial Distribution) A. .749 B. .600 C. 410 D251 6 r 20 singthe data in Question #19 above, whatistheprob ability thatyou willhav ore females on the committee? lo A. .633* B. .749 C. .400 D. .251 Fial レ USJsingthedataisQuestion #19, what...
A study by Allstate Insurance Co. finds that 82% of teenagers have used cell phones while...
A study by Allstate Insurance Co. finds that 82% of teenagers have used cell phones while dring (The Wall Street Journal, May 5 2010). In October 2010, Massachusetts enacted a law that forbids cell phone use by drivers under the age of 18. A policy analyst would lke to determine whether the law has decreased the proportion of drlvers under the age of 18 who use a cell phone. (You may find It useful to reference the eppropriate table: z...
need answers to a-d for this question a-c 7.4.15-T ComputePDXC) using the binomial probably formula Then...
need answers to a-d for this question
a-c
7.4.15-T ComputePDXC) using the binomial probably formula Then determine whether the normal distribution can be used to estimate this probability. If so, approximate PDX) using the normal distribution and compare the result with the exact probably 49. 07 and X-38 Oe. Yes, the normal bution can be used because not-P) 10. No the normal distribution cannot be used because np(1- 210 Approximate PIX) using the normal distribution Select the correct choice below...
3. There are 20 black cell phones and 30 white cell phones in a store. An employee t phones at random. Find the probability that (a) there will be exactly 4 black cell phones among the chosen phones; (b) there will be less than 3 black cell phones among the chosen phones.
5. (20 pts) Suppose on a given college campus 45% of the students own an iPhone, 50% an Android smartphone and 5% some other type of phone. Let X=the number of students in a simple random sample of 15 students who own an iPhone. A. What is the probability distribution of X? Note: If this is a well-known distribution it is sufficient to name the distribution and identify the value of the parameters B. Find the probability that 8 students...
A study by Allstate Insurance Co. finds that 82% of teenagers have used cell phones while driving (The Wall StreetJournal May 5. 2010). In October 2010, Massachusetts enacted a law that forbids cell phone use by drivers under the age of 18. A policy analyst would like to determine whether the law has decreased the proportion of drivers under the age of 18 who use a cell phone. (Y u may f1nd It useful to reference the opproprlete table: z...
help with 20 & 21
19. Data indicates that 60% of college students are female. If you randomly choose a students for a committee what is the probability that you will have exactly 6 females on the committee? (Use Binomial Distribution) A. .749 B. .600 C. 410 D251 6 r 20 singthe data in Question #19 above, whatistheprob ability thatyou willhav ore females on the committee? lo A. .633* B. .749 C. .400 D. .251 Fial レ USJsingthedataisQuestion #19, what...
A study by Allstate Insurance Co. finds that 82% of teenagers have used cell phones while dring (The Wall Street Journal, May 5 2010). In October 2010, Massachusetts enacted a law that forbids cell phone use by drivers under the age of 18. A policy analyst would lke to determine whether the law has decreased the proportion of drlvers under the age of 18 who use a cell phone. (You may find It useful to reference the eppropriate table: z...
need answers to a-d for this question
a-c
7.4.15-T ComputePDXC) using the binomial probably formula Then determine whether the normal distribution can be used to estimate this probability. If so, approximate PDX) using the normal distribution and compare the result with the exact probably 49. 07 and X-38 Oe. Yes, the normal bution can be used because not-P) 10. No the normal distribution cannot be used because np(1- 210 Approximate PIX) using the normal distribution Select the correct choice below...
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