Suppose that the mean and standard deviation of the scores on a
statistics exam are 87.9 and 5.76, respectively, and are
approximately normally distributed. Calculate the proportion of
scores above 87.
Question 1 options:









5)

We do not have enough information to calculate the value. 

Question 2 (1 point)
The stock price for International Business Machines (IBM)
historically has followed an approximately normal distribution
(when adjusting for inflation) with a mean of $167.817 and standard
deviation of $4.6834. What is the probability that on a selected
day the stock price is between $165.64 and 169.81?
Question 2 options:



2)

We do not have enough information to calculate the value. 







Question 3 (1 point)
The average adult female is 65.23 inches tall with a standard
deviation of 3.317. Based on this information, 86.08% of adult
females are greater than what height? Assume the distribution is
approximately normal.
Question 3 options:







4)

We do not have enough information to calculate the value. 



Question 4 (1 point)
A certain list of movies were chosen from lists of recent
Academy Award Best Picture winners, highest grossing movies, series
movies (e.g. the Harry Potter series, the Spiderman series), and
from the Sundance Film Festival and are being analyzed. The mean
box office gross was $139.033 million with a standard deviation of
$9.9558 million. Given this information, 22.83% of movies grossed
less than how much money (in millions)? Assume the distribution is
approximately normal.
Question 4 options:









5)

We do not have enough information to calculate the value. 

Question 5 (1 point)
Measurements were recorded for the slapshot speed of 100
minorleague hockey players. These measurements were found to be
normally distributed with mean of 88.421 mph and standard deviation
of 3.5543 mph. Would it be unusual to record a value below 80.55
mph?
Question 5 options:

1)

The value is borderline unusual. 




3)

It is impossible for this value to occur with this distribution
of data. 


4)

We do not have enough information to determine if the value is
unusual. 


5)

The value is not unusual. 

Question 6 (1 point)
Pinterest claims that 0.3719 of their app users are men. In a
sample of 78 randomly chosen app users, what is the probability
that less than 36 of them will be men?
Question 6 options:
Question 7 (1 point)
Pinterest claims that 0.3808 of their app users are men. In a
sample of 74 randomly chosen app users, what is the probability
that between 29 and 31 (inclusively) of them will be men?
Question 7 options:
Question 8 (1 point)
Pinterest claims that 0.3249 of their app users are men. In a
sample of 61 randomly chosen app users, what is the probability
that no more than 25 of them will be men?
Question 8 options:
Question 9 (1 point)
According to a survey conducted by Deloitte in 2017, 0.46 of
U.S. smartphone owners have made an effort to limit their phone use
in the past. In a sample of 80 randomly selected U.S. smartphone
owners, approximately __________ owners, give or take __________,
will have attempted to limit their cell phone use in the past.
Assume each pick is independent.
Question 9 options: