During the days of coronavirus, people work most of the time from home. Many offices, schools, universities conduct their works, meetings, classes online. As a result of this new normal, it is assumed that on average, utility expenses per family (electricity, water, gas etc.) increases by 40% per month. For the verification of this assumption, four months data of percentage change of utility expenses of 10 families of similar size is given below and answer the following questions, the data is normally distributed: Percentage change of utility expenses April 33.65 37.09 29.72 33.42 38.14 34.9 37.35 38.66 22.92 34.19 May 37.19 36.61 40.35 28.19 35.19 37.43 38.03 42.99 30.22 38.8 June 37.13 36.2 43.6 35.31 33.66 28.51 37.67 20.68 38.04 38.43 July 38.84 32.17 34.9 30.17 29.63 27.14 32.17 33.46 36.72 39.64 Which statistical technique(s) will be suitable for testing this assumption? (Only write the name(s) of all possible techniques) b. Write tabulated value of test statistic at 0.05 level of significance Write the null and alternative hypothesis for this test. а. C.

During the days of coronavirus, people work most of the time from home. Many offices, schools, universities conduct their works, meetings, classes online. As a result of this new normal, it is assumed that on average, utility expenses per family (electricity, water, gas etc.) increases by 40% per month. For the verification of this assumption, four months data of percentage change of utility expenses of 10 families of similar size is given below and answer the following questions, the data is normally distributed: Percentage change of utility expenses April 33.65 37.09 29.72 33.42 38.14 34.9 37.35 38.66 22.92 34.19 May 37.19 36.61 40.35 28.19 35.19 37.43 38.03 42.99 30.22 38.8 June 37.13 36.2 43.6 35.31 33.66 28.51 37.67 20.68 38.04 38.43 July 38.84 32.17 34.9 30.17 29.63 27.14 32.17 33.46 36.72 39.64 Which statistical technique(s) will be suitable for testing this assumption? (Only write the name(s) of all possible techniques) b. Write tabulated value of test statistic at 0.05 level of significance Write the null and alternative hypothesis for this test. а. C.

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MATLAB: An Introduction with Applications

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Concept explainers

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.

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Question

During the days of coronavirus, people work most of the time from home. Many offices, schools,
universities conduct their works, meetings, classes online. As a result of this new normal, it is
assumed that on average, utility expenses per family (electricity, water, gas etc.) increases by
40% per month. For the verification of this assumption, four months data of percentage change
of utility expenses of 10 families of similar size is given below and answer the following
questions, the data is normally distributed:
Percentage change of utility expenses
April
33.65
37.09
29.72
33.42
38.14
34.9
37.35
38.66
22.92
34.19
May
37.19
36.61
40.35
28.19
35.19
37.43
38.03
42.99
30.22
38.8
June
37.13
36.2
43.6
35.31
33.66
28.51
37.67
20.68
38.04
38.43
July
38.84
32.17
34.9
30.17
29.63
27.14
32.17
33.46
36.72
39.64
Which statistical technique(s) will be suitable for testing this assumption? (Only write
the name(s) of all possible techniques)
b. Write tabulated value of test statistic at 0.05 level of significance
Write the null and alternative hypothesis for this test.
а.
C.

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