121 U
1
40%
This is part of a bus timetable between Birmingham and Coventry.
Birmingham 07 02 07 30 08 05 08 3509 0209 31
a) How many minutes
should the 07 02 bus
Yardley 07 21 07 49 08 24 08 54 09 21 09 50
take to go from
Solihull 07 43 08 11 08 4609 16 09 43 10 12 Birmingham to
Coventry?
Meriden 07 59 08 27 09 02 09 32 09 59 10 28
minutes (1)
Coventry 08 34 09 0209 3710 07 10 34 | 11 03
b) Steve goes from Birmingham to Coventry by bus.
He takes 9 minutes to walk from his house to the bus stop in Birmingham.
He takes 12 minutes to walk from the bus stop in Coventry to work.
Steve has to get to work by 10 am.
What is the latest time Steve should
leave his house to get to work on time?
(3)
Total marks: 4

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Over the last 8 nights, elyse earned the following in tips: {105, 120, 84, 95, 100, 132, 140}. if she earns $140 a night for the next four nights, which measure of center would increase more, the mean or median?

Questions 9-10. use the table of educational expenditures to answer the questions. k-12 education expenditures population indiana $9.97 billion 6.6 million illinois $28.54 billion 12.9 million kentucky $6.58 billion 4.4 million michigan $16.85 billion 9.9 million ohio $20.23 billion 11.6million 9. if the amount of k-12 education expenses in indiana were proportional to those in ohio, what would have been the expected value of k-12 expenditures in indiana? (give the answer in billions rounded to the nearest hundredth) 10. use the value of k-12 education expenditures in michigan as a proportion of the population in michigan to estimate what the value of k-12 education expenses would be in illinois. a) find the expected value of k-12 expenditures in illinois if illinois were proportional to michigan. (give the answer in billions rounded to the nearest hundredth) b) how does this compare to the actual value for k-12 expenditures in illinois? (lower, higher, same? )