The number of robocalls received by a given household in twelve
randomly selected weeks results in...
The number of robocalls received by a given household in twelve
randomly selected weeks results in the following data set: {9, 7,
2, 9, 4, 8, 4, 10, 15, 10, 20, 8}. Use this to find the 90%
confidence interval estimate of the mean number of calls received
per week. Use a T-interval.
As an aid for improving students' sleeping habits, nine students
were randomly selected to attend a...
As an aid for improving students' sleeping habits, nine students
were randomly selected to attend a seminar on the importance of
sleep in life. The table below shows the number of hours each
student slept per week before the seminar.
Students
1
2
3
4
5
6
7
8
9
Before
9
12
6
15
3
18
10
13
7
After
9
17
9
20
2
21
15
22
6
a. Construct a 90% confidence interval for the difference of...
A call centre receives, on average, 10 calls per minute. The
highest number of calls received...
A call centre receives, on average, 10 calls per minute. The
highest number of calls received in any minute is 15. For any
randomly selected minute, find the probability that they will
receive:
i. At least 13 calls
ii. At most 2 calls
iii. 7 to 9 calls
iv. Find the Mean, Variance and Standard Deviation of the
distribution
show all working
Randomly selected students were given five seconds to estimate
the value of a product of numbers...
Randomly selected students were given five seconds to estimate
the value of a product of numbers with the results shown below.
Estimates from students given
1×2×3×4×5×6×7×81×2×3×4×5×6×7×8:
45000, 1000, 500, 1500, 856, 1000, 1252, 200, 1110, 400045000,
1000, 500, 1500, 856, 1000, 1252, 200, 1110, 4000
Estimates from students given
8×7×6×5×4×3×2×18×7×6×5×4×3×2×1:
2000, 2050, 100000, 40320, 300, 10000, 550, 400, 377,
1000002000, 2050, 100000, 40320, 300, 10000, 550, 400, 377,
100000
Use a 0.050.05 significance level to test the claim that the...
Fireworks. Last summer, Survey USA published results of a survey
stating that 281 of 531 randomly...
Fireworks. Last summer, Survey USA published results of a survey
stating that 281 of 531 randomly sampled Kansas residents planned
to set off fireworks on July 4th. Round all results to 4 decimal
places. 1. Calculate the point estimate for the proportion of
Kansas residents that planned to set off fireworks on July 4th 2.
Calculate the standard error for the point estimate you calculated
in part 1. 3. Calculate the margin of error for a 90 % confidence
interval...