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WorksheetsDL-Tutorial#1 (Stats Refresher )
Total questions: 12
Worksheet time: 56mins
Bank of Guna is trying to determine the number of tellers available during the lunch rush on Fridays. The bank has collected data on the number of people who entered the bank during the last 3 months on Friday from 11:00 A.M. to 1:00 P.M. Use the data (separated by comma) below to answer the following questions.
242, 275, 289, 306, 342, 385, 279, 245, 269, 305, 294, 328
Find point estimates of the mean?
296.583 people
269.654 people
345.545 people
302.312 people
For the same data as above: 242, 275, 289, 306, 342, 385, 279, 245, 269, 305, 294, 328
Find standard deviation of the population from which the sample was drawn.
40.751 people
49.675 people
46.878 people
47.878 people
Priya Tendulkar, apartment manager for Green View Apartments, wants to inform potential renters about how much electricity they can expect to use during June. She randomly selects 61 residents and discovers their average electricity usage in June to be 894 kilowatt hours (kwh). Priya believes the variance in usage is about 131 (kwh)2. What would be an interval estimate for the average June electricity usage so Priya can be 68.3 percent certain the true population mean lies within this interval?
(892.46, 895.46) kwh
(879.23, 899,23) kwh
(891,12, 897.12) kwh
(880.12, 898.12) kwh
What would be an interval estimate for the average June electricity usage so Priya can be 99.73 percent certain the true population mean lies within this interval?
(889.62, 898.38) kwh
(891,12, 897.12) kwh
(880.12, 898.12) kwh
(892.46, 895.46) kwh
The administrator of a hospital surveyed the number of days for which 200 randomly chosen patients stayed in the hospital for the treatment of COVID-19. The data are given in the image with this question. What is the mean of the above distribution shown in the table?
7.715
6.715
5.715
8.715
According to Chebyshev's theorem, how many stays should be between 0 and 17 days? Given that the standard deviation of the distribution is 4.69 days.
150 stays
50 stays
90 stays
200 stays
Because the distribution is roughly bell-shaped, how many stays can we expect between 0 and 17 days?
191
151
141
171
Here are the high temperature readings during June 2020 in Guna, MP. Find the 70th percentile:
84, 86, 78, 69, 94, 95, 94, 98, 89, 87, 88, 89, 92, 99, 102,
94, 92, 96, 89, 88, 87, 88, 84, 82, 88, 94, 97, 99, 102, 105
84
87
94
99
Choose the correct statement(s) from the following:
Central limit theorem says that 'Mean of the sampling distribution cannot estimate the population mean'
Mean can work with open-ended classes, but mean shouldn't lie in the open-ended interval
Sample Median is more popular estimator of the Population Mean than the Sample Mean
None of the mentioned are correct
Choose the correct statement(s) from the following:
Median is a better measure of central tendency than mean if the data is normally distributed
Mode is a better measure of central tendency than mean if the data is normally distributed
Mean is a better measure of central tendency than median if the data is normally distributed
None of the mentioned are correct
Accepting a null hypothesis when it is false is called:
Type-2 error
Type-1 error
Significance level (alpha)
None of the mentioned is correct
Choose the correct statement from the following:
Data and Output is the input to the traditional programming, and program is the output
LADARs are used for detecting distance from an object in Autonomous cars
Supervised learning requires training data and a few desired outputs
Association is a technique of Supervised learning
