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4. A factory manager collected a sample of 10 packets of 3-in-1 coffee and the weights...
Business Statistics
A factory manager collected a sample of ten (10) packets of 3 -in-1 coffee and the weights (in grams) of each packet are recorded as follow.\(\begin{array}{lllll}25 & 23 & 26 & 28 & 24 \\ 21 & 26 & 24 & 25 & 27\end{array}\)Calculate(a) the mean weight of a packet of 3 -in-1 coffee.(b) the sample standard deviation of the data collected.(c) find a \(90 \%\) confidence interval for the weights of the 3 -in- 1 coffee.
A coffee company sells bags of coffee beans with an advertised weight of 454 grams. A...
A coffee company sells bags of coffee beans with an advertised weight of 454 grams. A random sample of 20 bags of coffee beans has an average weight of 457 grams. Weights of coffee beans per bag are known to follow a normal distribution with standard deviation 4 grams. (a) Construct a 95% confidence interval for the true mean weight of all bags of coffee beans. (Instead of typing ±, simply type +-.) (b) Provide an interpretation of the confidence...
4 .A random sample of the birth weights of 24 babies has a mean of 3103...
4 .A random sample of the birth weights of 24 babies has a mean of 3103 grams and a standard deviation of 696 grams. Construct a 95% confidence interval estimate of the mean birth weight for all such babies. if possible include graph
26. A machine fills boxes of cereal in a factory. The average weight of cereal in...
26. A machine fills boxes of cereal in a factory. The average weight of cereal in a randonm sample of 17 boxes is calculated to be 1350 grams and the sample standard deviation is calculated to be 8 grams. Weights of cereal per box are known to follow a normal distribution. We calculate a 95% donfidence interval for the true mean weight ot cereal per box. The margin of error for the appropriate confidence interval i (A) 3.19 (B) 3.38...
10. Properties of a confidence interval Suppose the mean of a population is 22. A researcher...
10. Properties of a confidence interval Suppose the mean of a population is 22. A researcher (who does not know that p Then she constructs a 95% confidence interval of the population mean. 22) selects a random sample of size n from this population. The true population mean and the researcher's 95% confidence interval of the population mean are shown in the following graph. Use the graph to answer the questions that follow Sample Mean 95% Confidence interval of the...
The table available below shows the weights (in pounds) for a sample of vacuum cleaners. The...
The table available below shows the weights (in pounds) for a sample of vacuum cleaners. The weights are classified according to vacuum cleaner type. At a = 0.05, can you conclude that at least one mean vacuum cleaner weight is different from the others? ES: Click the icon to view the vacuum cleaner weight data. Let PBU. PALU, and Htc represent the mean weights for bagged upright, bagless upright, and top canister vacuums respectively. What are the hypotheses for this...
Mooncents Coffee Shop has just opened, and on the first 6 days of business, the number...
Mooncents Coffee Shop has just opened, and on the first 6 days of business, the number of customers who have come into the store during a particular time period are as reported in the following table. Day # Customers 1 25 2 22 3 23 4 28 5 29 6 26 a. Calculate the average number of customers visiting and the sample standard deviation of customer visits for Mooncents Coffee. (Round intermediate...
1)Dog weights. Adult German shepherd weights are normally distributed with mean of 73 pounds and standard...
1)Dog weights. Adult German shepherd weights are normally distributed with mean of 73 pounds and standard deviation of 8 pounds. (a) The bottom 24% of weights are below what weight? _________ (b) 76% of weights are above what weight?___________ (c) The top 24% of weights are above what weight? ___________ (Round answers to one decimal place) 2)A distribution of values is normal with a mean of 60 and a standard deviation of 7. Find the interval containing the middle-most 82%...
Sample Number Average Weight 1 654.9 2 603.8 3 623.7 4 606.7 5 618 6 584...
Sample Number
Average Weight
1
654.9
2
603.8
3
623.7
4
606.7
5
618
6
584
7
569.8
8
606.7
9
609.5
10
572.7
11
575.5
12
569.8
13
615.2
14
595.3
15
612.3
16
606.7
17
578.3
18
646.4
19
598.2
20
586.8
21
612.3
22
635
23
603.8
24
598.2
25
569.8
26
601
27
64.2
28
598.2
29
612.3
30
603.8
Exercise 2: Canned Tomatoes During long production runs of canned tomatoes, the average weights (in mL)...
Problem 4 A sample of 15 small begs of the same brand of candies was selected....
Problem 4 A sample of 15 small begs of the same brand of candies was selected. Assume that the population distribution of bag weights is normal. The weight of each bag was then recorded. The mean weight was 2 ounces with a sample standard deviation 0.2 ounces. We would like tocalculate an 80%confidence interval for the average weight of a sample of size 15 . a. (3%) standard error b. (3%) The critical t value for an 80% confidence interval...
26. A machine fills boxes of cereal in a factory. The average weight of cereal in a randonm sample of 17 boxes is calculated to be 1350 grams and the sample standard deviation is calculated to be 8 grams. Weights of cereal per box are known to follow a normal distribution. We calculate a 95% donfidence interval for the true mean weight ot cereal per box. The margin of error for the appropriate confidence interval i (A) 3.19 (B) 3.38...
10. Properties of a confidence interval Suppose the mean of a population is 22. A researcher (who does not know that p Then she constructs a 95% confidence interval of the population mean. 22) selects a random sample of size n from this population. The true population mean and the researcher's 95% confidence interval of the population mean are shown in the following graph. Use the graph to answer the questions that follow Sample Mean 95% Confidence interval of the...
The table available below shows the weights (in pounds) for a sample of vacuum cleaners. The weights are classified according to vacuum cleaner type. At a = 0.05, can you conclude that at least one mean vacuum cleaner weight is different from the others? ES: Click the icon to view the vacuum cleaner weight data. Let PBU. PALU, and Htc represent the mean weights for bagged upright, bagless upright, and top canister vacuums respectively. What are the hypotheses for this...
Sample Number
Average Weight
1
654.9
2
603.8
3
623.7
4
606.7
5
618
6
584
7
569.8
8
606.7
9
609.5
10
572.7
11
575.5
12
569.8
13
615.2
14
595.3
15
612.3
16
606.7
17
578.3
18
646.4
19
598.2
20
586.8
21
612.3
22
635
23
603.8
24
598.2
25
569.8
26
601
27
64.2
28
598.2
29
612.3
30
603.8
Exercise 2: Canned Tomatoes During long production runs of canned tomatoes, the average weights (in mL)...
Problem 4 A sample of 15 small begs of the same brand of candies was selected. Assume that the population distribution of bag weights is normal. The weight of each bag was then recorded. The mean weight was 2 ounces with a sample standard deviation 0.2 ounces. We would like tocalculate an 80%confidence interval for the average weight of a sample of size 15 . a. (3%) standard error b. (3%) The critical t value for an 80% confidence interval...
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