Transcript Warm Ups Term 1 Week 6 9/14-9/18

Term 1 Week 6
Warm Ups
Warm Up 9/14/15
1. A survey shows that 53% will vote yes and
40% will vote no on an issue, with a 8%
margin of error. Explain whether there is a
clear preference on the issue. Also, determine
the number of people surveyed.
2. Calculate the mean, mode, IQR, 5 summary,
standard deviation, and variance
for the data: 14, 13, 16, 9, 3, 7, 11, 12, 11, 4
Warm Up 9/15/15
3. To disprove a previous study that claims that
college graduates make an average salary of
$46,000, a researcher records the salaries of
50 graduates and finds that the sample mean
is $43,000, with a standard deviation of
$4,500. What is the z-value, and can she reject
the null hypothesis?
4. What percent of
the normal distribution
is shaded?
Warm Up 9/15/15 Alt. (P7)
3. The data set shows the amount of money spent
by shoppers at Wal-Mart. Identify the outlier
and describe how it affects the mean and
standard deviation:
35, 18, 49, 55, 282, 29, 42, 61, 19, 80, 33, 45, 67,
28, 71, 37, 48, 50, 31, 22
4. Scores on a test are normally distributed with a
mean of 75 and a standard deviation of 8.
Estimate the probability that a randomly
selected student scored less than 87. Also,
estimate the probability that a randomly
selected student scored more than 87.
Warm Up 9/16/15
5. The temperatures of several cities in 2014 were
recorded as 73o, 75o, 76o, 37o, 48o, 66o, 71o, 39o,
and 57o. Due to el nino, the temperatures in 2015
are expected to each
rise by 8o. How will this
affect the mean and
standard deviation?
6. Use the graph at
the right:
Warm Up 9/16/15 Alt. (P7)
5. In the 2007 the Mustangs scored the
following numbers of runs against opposing
baseball teams during their season: 2, 6, 5, 2,
4, 6, 6, 10, 3, 19, 4, 4, 2, 3. Calculate the mean
absolute deviation.
6. What percent of
the normal distribution
is shaded?
Warm Up 9/17/15
7. A survey shows that 55% will vote yes and
45% will vote no on an issue, with a 7%
margin of error. Explain whether there is a
clear preference on the issue. Also, determine
the number of people surveyed.
8. Calculate the mean absolute deviation for the
data: 14, 13, 16, 9, 3, 7, 11, 12, 11, 4