Compute the range and sample standard deviation for strength of the concrete (in psi). 3910, 4090, 3500, 3100, 2940, 3830, 4090, 4040
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- : 20. Calculate the standard deviation from the following data : Size of item Frequency Size of item Frequency 6. 3 10 8 11 5 8 9. 12 4 9. 13Assume that a randomly selected subject is given a bone density test. Those test scores are normally distributed with a mean of 0 and a standard deviation of 1. Draw a graph and find the probability of a bone density test score between - 1.66 and 1.66. Sketch the region. Choose the correct graph below. OA. OB. OC. OD. -1.66 1.66 -1.66 1.66 -1.66 1.66 -1.66 1.66 The probability is (Round to four decimal places as needed.)A ski gondola carries skiers to the top of a mountain. Assume that weights of skiers are normally distributed with a mean of 183lb and a standard deviation of 35 lb. The gondola has a stated capacity of 25 passengers, and the gondola is rated for a load limit of3500 lb. Complete parts (a) through (d) below. a. Given that the gondola is rated for a load limit of 3500lb, what is the maximum mean weight of the passengers if the gondola is filled to the stated capacity of 25 passengers? The maximum mean weight is _____lb.
- A ski gondola carries skiers to the top of a mountain. Assume that weights of skiers are normally distributed with a mean of 180 lb and a standard deviation of 42 lb. The gondola has a stated capacity of 25 passengers, and the gondola is rated for a load limit of 3500 lb. Complete parts (a) through (d) below. a. Given that the gondola is rated for a load limit of 3500 lb, what is the maximum mean weight of the passengers if the gondola is filled to the stated capacity of 25 passengers? The maximum mean weight is Ib. (Type an integer or a decimal. Do not round.) b. If the gondola is filled with 25 randomly selected skiers, what is the probability that their mean weight exceeds the value from part (a)? The probability is . (Round to four decimal places as needed.) c. If the weight assumptions were revised so that the new capacity became 20 passengers and the gondola is filled with 20 randomly selected skiers, what is the probability that their mean weight exceeds 175 lb, which is the…Assume that a randomly selected subject is given a bone density test. Those test scores are normally distributed with a mean of 0 and a standard deviation of 1. Draw a graph and find the probability of a bone density test score greater than - 1.65. Sketch the region. Choose the correct graph below. O A. O B. OC. OD. 1.65 -1.65 -1.65 -1.65 1.65Please count it manually without using excel so I can learn how to calculate it 3. A landlord is the owner of an apartment decides to build new rooms for ensuit, studio, and large studio rooms. The landlord wants to match the capacity of the room to the room size, and the number of people per room. The collected data below is the populations of people per room for the past six years. The data is normally distributed, independent and have an equal standard deviation Studio Large Studio Ensuit 20 8 10 18 12 22 10 3 15 12 12 14 15 8 a. Draw the data in a dot plot. Explain which hypotheses supported by the dot plot. HO: µEnsuit = uStudio = µlarge Studio Ha: The mean scores are not equal b. Is there any difference in the mean of the people in three rooms at the level of significance of 0.01? and develop the ANOVA table.
- Assume that the readings on the thermometers are normally distributed with a mean of 0°and standard deviation of1.00°C. A thermometer is randomly selected and tested. Draw a sketch and find the temperature reading corresponding to P91,the 91stpercentile. This is the temperature reading separating the bottom 91% from the top 9%.Please count it manually without using excel so I can learn how to calculate it 3. A landlord is the owner of an apartment decides to build new rooms for ensuit, studio, and large studio rooms. The landlord wants to match the capacity of the room to the room size, and the number of people per room. The collected data below is the populations of people per room for the past six years. The data is normally distributed, independent and have an equal standard deviation Studio Large Studio Ensuit 20 12 10 18 4 22 10 3 15 12 12 14 15 8. a. Draw the data in a dot plot. Explain which hypotheses supported by the dot plot. H0: µEnsuit = µStudio = µLarge Studio Ha: The mean scores are not equal b. Is there any difference in the mean of the people in three rooms at the level of significance of 0.01? and develop the ANOVA table.3:50 K A concrete mix is designed to withstand 3000 pounds per square inch (psi) of pressure. The following data represent the strength of nine randomly selected casts (in psi). 3970, 4090, 3200, 3200, 2940, 3820, 4100, 4050, 3390 Compute the mean, median and mode strength of the concrete (in psi). Compute the mean strength of the concrete. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. The mean strength of the concrete is (Round to the nearest tenth as needed.) OB. The mean does not exist. OA. The median strength of the concrete is (Round to the nearest tenth as needed.) Compute the median strength of the concrete. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OB. The median does not exist. psi of pressure. OB. The mode Compute the mode strength of the concrete. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. The mode of…
- To determine if their 13 oz filling machine is properly adjusted, Smith Paints has decided to use an X-Chart which uses the range to estimate the variability in the sample. J. Step 1 of 7: What is the Center Line of the control chart? Round your answer to three decimal places. Period 1 2 day Select the Copy Table button to copy all values. To select an entire row or column, either click on the row or column header or use the Shift and arrow keys. To find the average of the selected cells, select the Average Values button. Copy Table Average Values The average of the selected cell(s) is 12.970. Copy Value 3 4 5 6 7 Table Control Chart 8 9 10 11 obs5 obs6 Sample Mean Sample Range 13.02 13.0050 12.97 12.98 13.04 13.04 13.01 13.01 13.03 12.95 12.96 13.05 12.98 12.9967 obs1 obs2 obs3 obs4 13.01 13.01 12.98 13.05 13.02 12.98 12.99 12.97 12.9983 12.98 13.01 13.02 12.96 13.03 13.04 13.0067 13.04 13.04 13.02 13.03 13.02 13.04 13.0317 12.99 12.96 13.03 12.95 12.97 13.05 12.9917 12.98 12.96 12.99…The specification limits for a product are 8 cm and 10 cm. A process that produces the product has a mean of 8.5 cm and a standard ?deviation of 0.2 cm. What is the process capability, Cpk .a 1.67 .b 3.33 .C None of them .d 0.83 .e 2.50A ski gondola carries skiers to the top of a mountain. Assume that weights of skiers are normally distributed with a mean of 193 lb and a standard deviation of 36 lb. The gondola has a stated capacity of 25 passengers, and the gondola is rated for a load limit of 3750 lb. Complete parts (a) through (d) below. a. Given that the gondola is rated for a load limit of 3750 lb, what is the maximum mean weight of the passengers if the gondola is filled to the stated capacity of 25 passengers? The maximum mean weight is lb. (Type an integer or a decimal. Do not round.) b. If the gondola is filled with 25 randomly selected skiers, what is the probability that their mean weight exceeds the value from part (a)? The probability is- (Round to four decimal places as needed.) c. If the weight assumptions were revised so that the new capacity became 20 passengers and the gondola is filled with 20 randomly selected skiers, what is the probability that their mean weight exceeds 187.5 lb, which is the…
