In April 2025
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Suppose a population consists of the five measurements: 2, 6, 8, 0, and 1:
1. What is the mean and standard deviation of the population?
2. How many different samples of size n=2 can be drawn from the population? List them with their corresponding means.
Follow the step by step procedure.
A population of a certain ethnic group is consisting of three numbers (3,4,5,6,7). if samples of size 2 will be taken without replacement, find..
a. population mean
b. population variance
c. population standard deviation
d. mean of the sampling distribution of the sample mean
e. variance of the sampling distribution of the sample mean
f. standard deviation of the sampling distribution of the sample mean
Assume that when adults with smart phones are randomly selected 44% of them use them in meetings or classes if 12 adult smartphone users are randomly selected find the probability that fewer than 4 of them use their smart phones in meetings or classes
The table below presented the ranks which were assigned by three judges to the works
of ten articles:
S.no. 1 2 3 4 5 6 7 8 9 10
Judge A 5 7 4 1 3 2 9 8 10 6
Judge B 4 8 3 2 7 1 10 6 9 5
Judge C 8 6 2 10 4 1 3 9 5 7
Compute the spearman’s rank order correlation coefficients for each pair of ranking and
decide:
a) Which two judges are most alike in their opinion about these artists?
b) Which two judges are different in their opinion about these artists?
A life insurance company will sell a 1 million three-year term life insurance policy
exclusive in a particular risk group for a premium of ₱2,000.00. Let X denote the
net gain to the company from the sale of one policy.13. How much is the net loss of the insurance company from a policyholder
if his family will avail of the insurance benefits?
A. ₱1,000,000.00
C. ₱998,000.00
B. ₱999, 000.00
D. ₱995,000.00
A population of 25 year- old female has a mean salary of P20,800 with a standard deviation of P1200. If a random sample of 10 is considered from the population, what is the probability that their salary is greater than P20900?
1. In a test of Ho: u=85 against Ha: u>85, the sample data yield the sample statistic z=1.64. Find the p value for the test.
2. In a test of Ho: u=80 against Ha: u≠80, a sample of observations had a mean and standard deviation s=4.1. Find the p-value for the test.
If a farmer is chosen randomly from this community, what is the probability that he grows neither oranges nor lemon
A restaurant buys avocados from three suppliers P, Q and R. Records show that 30% of the avocados come from P, 55% come from Q and the rest come from R. Further records show that 8% of avocados supplied by P are substandard, 12% of avocados supplied by Q are substandard and 15% of avocados supplied by R are substandard.
Rashmi Dhar, manufacturer, and seller of ‘Kashmiri – Kahwa’ through E-commerce websites.
She wanted to know the effect of her spending in advertisement of ‘Kahwa’ on the sales, along with the other factors; ‘number of sales representatives’, ‘customer-satisfaction ratings’. For this research she has gathered the sales data in the following table, along with other necessary information.
Part 1) Run regression analysis in EXCEL
Part 2) Write the interpretation of Regression statistics-table, ANOVA-table.
Region/ Districts
Sales of Kahwa (in INR)
Spending in advertise (in INR)
Number of sales representatives (person)
Customer-satisfaction ratings (1=highly dissatisfied to 5 = highly satisfied)
Kupwara
55328
5512
1
1
Badgam
56251
8337
1
1
Leh-ladakh
57126
8788
4
1
Kargil
58739
8828
5
1
Punch
66984
9050
5
2
Rajouri
70676
10150
7
2
Kathau
73206
11236
8
2
Baramula
80571
12538
8
3
Bandipore
93168
13161
8
3
Srinagar
99432
13448
9
4
