Question 5 of 15. Step 1 of 1 4/15 Correct Thompson and Thompson is a steel...
Thompson and Thompson is a steel bolts manufacturing company. Their current steel bolts have a mean diameter of 147 millimeters, and a variance of 36. If a random sample of 43 steel bolts is selected, what is the probability that the sample mean would be greater than 144.9 millimeters? Round your answer to four decimal places.
Question 15 of 24 Step 1 of 5 01:08:31 A sample of 84 motels is selected from a large urban area and the price for a night of lodging for a single room was determined for each motel. The mean rate is computed to be $93 and the standard deviation is $14. One motel charged $57 per night which is the 15 percentile, charged $118 per night which is the 75th percentile. Step 1 of 5: What is the z-score...
Consider the following:Thompson and Thompson is a steel bolts manufacturing company. Their current steel bolts have a mean diameter of 130 millimeters, and a variance of 49. If a randomsample of 43 steel bolts is selected, what is the probability that the sample mean would be greater than 129.1 millimeters? (Round your answer to 4 decimal places)
Question 2 of 4, Step 1 of 5 3/20 Correct 3 A technician compares repair costs for two types of microwave ovens (type I and type II). He believes that the repair cost for type I ovens is greater than the repair cost for type Il ovens. A sample of 33 type I ovens has a mean repair cost of $89.32. The population standard deviation for the repair of type I ovens is known to be $24.88. A sample of...
A manager records the repair cost for 17 randomly selected stereos. A sample mean of $82.37 and standard deviation of $19.66 are subsequently computed. Determine the 80% confidence interval for the mean repair cost for the stereos. Assume the population is approximately normal Step 1 of 2: Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places. Answer (How to Enter) 2 Points Keypad 2020 Hawkes Learning pe here to...
A fashion designer wants to know how many new dresses women buy each year. A sample of 523 women was taken to study their purchasing habits. Construct the 95 % confidence interval for the mean number of dresses purchased each year if the sample mean was found to be 7.3. Assume that the population standard deviation is 1.4. Round your answers to one decimal place. Answer/How to Enter) 4 Points Tables Keypad Lower endpoint Upper endpoint: here to search A...
need help Question 4 of 13, Step 1 of 1 correct An operation manager at an electronics company wants to test their amplifiers. The design engineer daims they have a mean output of 482 watts with a variance of 121. What is the probability that the mean amplifier output would be greater than 479.4 watts in a sample of 59 amplifiers if the claim is true? Round your answer to four decimal places. How to enter your answer I Tables...
A study on the latest fad diet claimed that the amounts of weight lost by all people on this diet had a mean of 23.8 pounds and a standard deviation of 7.2 pounds. Step 1 of 2: If a sampling distribution is created using samples of the amounts of weight lost by 59 people on this diet what would be the mean of the sampling distribution of sample means? Round to two decimal places, if necessary Tables Keypad Answer 2...
Suppose that a study of elementary school students reports that the mean age at which children begin reading is 5.7 years with a standard deviation of 0.7 years. Step 1 of 2: If a sampling distribution is created using samples of the ages at which 55 children begin reading, what would be the mean of the sampling distribution of sample means? Round to two decimal places, if necessary. Tables Keypad Answer 2 Points 2019 Hawkes Learning here to search
Question 12 of 15, Step 2 of 2 Correct NASA is conducting an experiment to find out the fraction of people who black out at forces greater than 6. Step 2 of 2: Suppose a sample of 581 people is drawn. Of these people, 278 passed out. Using the data, construct the 95% confidence interval for the population proportion of people who black out at Gforces greater than 6. Round your answers to three decimal places. Tables Keypad Answer How...