Sixty-five randomly selected car salespersons were asked the number of cars they generally sell in one week. Fourteen people answered that they generally sell three cars; nineteen generally sell four cars; twelve generally sell five cars; nine generally sell six cars; eleven generally sell seven cars. Complete the table.
To construct the histogram for the data in
[link] , determine appropriate minimum and maximum
x and
y values and the scaling. Sketch the histogram. Label the horizontal and vertical axes with words. Include numerical scaling.
Answers will vary. One possible histogram is shown:
Use the two frequency tables to compare the life expectancy of men and women from 20 randomly selected countries. Include an overlayed frequency polygon and discuss the shapes of the distributions, the center, the spread, and any outliers. What can we conclude about the life expectancy of women compared to men?
The following data sets list full time police per 100,000 citizens along with homicides per 100,000 citizens for the city of Detroit, Michigan during the period from 1961 to 1973.
Year
1961
1962
1963
1964
1965
1966
1967
Police
260.35
269.8
272.04
272.96
272.51
261.34
268.89
Homicides
8.6
8.9
8.52
8.89
13.07
14.57
21.36
Year
1968
1969
1970
1971
1972
1973
Police
295.99
319.87
341.43
356.59
376.69
390.19
Homicides
28.03
31.49
37.39
46.26
47.24
52.33
Construct a double time series graph using a common
x -axis for both sets of data.
Which variable increased the fastest? Explain.
Did Detroit’s increase in police officers have an impact on the murder rate? Explain.
7.The following data give thenumber of car thefts that occurred in a city in the past 12 days.
63711438726915
Calculate therange, variance, and standard deviation.
a bad contain 3 red and 5 black balls another 4 red and 7 black balls, A ball is drawn from a bag selected at random, Find the probability that A is red?
The information is given as, 30% of customers shopping at SHOPNO will switch to DAILY SHOPPING every month on the other hand 40% of customers shopping at DAILY SHOPPING will switch to other every month. What is the probability that customers will switch from A to B for next two months?
The information are given from a randomly selected sample of age of COVID-19 patients who have already survived. These information are collected from 200 persons. The summarized information are as, n= 20; ∑x = 490; s^2 = 40. Calculate 95% confident interval of mean age.
Ashfat
The mode of the density of power of signal is 3.5. Find the probability that the density of a random signal will be more than 2.5.
Ashfat
The average time needed to repair a mobile phone set is 2 hours. If a customer is in queue for half an hour, what is the probability that his set will be repaired within 1.6 hours?
Ashfat
A quality control specialist took a random sample of n = 10 pieces of gum and measured their thickness and found the mean 9 and variance 0.04. Do you think that the mean thickness of the spearmint gum it produces is 8.4
3. The following are the number of mails received in different days by different organizations:
Days (x) : 23, 35, 38, 50, 34, 60, 41, 32, 53, 67.
Number of mails (y) : 18, 40, 52, 45, 32, 55, 50, 48, 26, 25.
i) Fit a regression line of y on x and test the significance of regression.
ii) Estimate y
The number of problem creating computers of two laboratories are as follows:
Number of computers: 48, 6, 10, 12, 30, 11, 49, 17, 10, 14, 38, 25, 15, 19, 40, 12.
Number of computers: 12, 10, 26, 11, 42, 11, 13, 12, 18, 5, 14, 38.
Are the two laboratories similar in respect of problem creating compute
Is the severity of the drug problem in high school the same for boys and
girls? 85 boys and 70 girls were questioned and 34 of the boys and 14 of the girls admitted to
having tried some sort of drug. What can be concluded at the 0.05 level?
a quality control specialist took a random sample of n=10 pieces of gum and measured their thickness and found the mean 7.6 and standered deviation 0.10. Do you think that the mean thickness of the spearmint gum it produces is 7.5?
99. A one sample, one-tail t-test is conducted and the test statistic value is calculated to be 2.56.
The degrees of freedom for the test are 10. Which of the following conclusions for the test would
be correct?
a
A one sample, one-tail t-test is conducted and the test statistic value is calculated to be 2.56.
The degrees of freedom for the test are 10. Which of the following conclusions for the test would
be correct?
A quality control specialist took a random sample of n = 10 pieces of gum and measured their thickness and found the mean 7.6 and variance 0.01. Do you think that the mean thickness of the spearmint gum it produces is 7.5?
(4 Points)
Omer
10 gums
mean = 7.6
variance= 0.01
standard deviation= ?
what us the data set?