Low Temperature
(circle◦F)

40minus−44

45minus−49

50minus−54

55minus−59

60minus−64


Frequency

22

66

99

77

11


Note:
Hi! Thank you for posting the question. However, in our display of the website, the actual mean is showing as “51.951.9”. We have considered it as 51.9 and proceeded with the problem. Also, the classes of Low Temperature are showing as “40minus–44”, “45minus–49”, etc. We have considered these as 40 – 44, 45 – 49, etc., as in “40 to 44”, “45 to 49”,… and solved the problem.
Calculation:
In order to find the mean of a grouped frequency, the midpoint of each class is considered as the representative of that class.
If the midpoint of a class is taken as x and the frequency as f, then the mean is: (Σxf) / (Σf).
The following table shows the calculation of the mean:
The mean and its comparison:
Thus, the mean of the grouped frequency distribution is:
mean = (Σxf) / (Σf)
= 14,245/275
= 51.8.
The actual mean is 51.9.
The mean of the grouped frequency distribution (51.8°F) and the actua...
Q: I'm confused about the Variable Definition for Qualitive (Categorical). What I have is, Qualitive(Ca...
A: A categorical variable represents data types that can be split into groups. There are two types of C...
Q: 2. The following table represents the carbon emissions in millions of tons from consumption of fossi...
A: (a) Point estimate and standard deviation:Point estimate:The general formula to obtain the mean of a...
Q: A candy manufacturer sells bags of chocolate treats that are supposed to be half dark chocolate and ...
A: A one sample ztest must be performed to test the claim that the proportion of dark chocolates is 0...
Q: The table below contains the geographic latitudes, x, and average January temperatures, y, of 20 cit...
A: Enter the data as shown in excel
Q: A group of students decide to participate in a national strength test. Assume a normal distribution ...
A: Given mean number of students participated in national strength test = 580Standard deviation = 72.5T...
Q: Guys, parts (b) and (c) in this solution that you have sent me twice is incorrect https://www.bartle...
A: X data transfer time, is gamma distribution with mean 37.5 and standard deviation 21.6. So, The valu...
Q: See attachment.
A: Given X(n,p) is a binomial random variable with parameters n,p.n is total number of trailsp is proba...
Q: Need help with (c) and (d) Mist (airborne droplets or aerosols) is generated when metalremoving flu...
A: (c) Null and alternative hypotheses:Null hypothesis:H0: β1 = 0.6Alternative hypothesis:Ha: β1 < 0...
Q: yai ayu, au uiaı uie iwu aapico aI IIupcInuc J pi IaIuvII apico ocicLICu 1VIITIVILIany uiouIvulcu pu...
A: Solution:Null and alternative hypotheses:The null and alternative hypotheses to test is given below:...