As a quality control manager, you have been measuring the pressure level provided by a newly installed pump which are purchased from new manufacturer. The mean pressure maintained by the old pump was 150.00 kPa. The manufacturer of the new pump claims that the pressure will be improved after installing the new pump. You have been tasked to ensure that the new pump is better. DATA 96.17 128.32 169.54 167.06 108.02 125.95 152.66 106.58 156.05 134.51 108.77 129.19 93.88 139.16 119.73 176.95 175.1 131.27 182.63 123.95 116.56 91.28 133.55 117.12 217.31 147.25 104.32 159.96 99.02 104.7 124.9 131.31 98.18 66.54 172.01 46.32 140.98 158.39

Measuring lung function: One of the measurements used to determine the health of a person's lungs is the amount of air a person can exhale under force in one second. This is called forced expiratory volume in one second, and is abbreviated FEV1. Assume the mean FEV1 for 10 -year-old boys is 2.1 liters and that the population standard deviation is =σ0.4 . A random sample of 35 10 -year-old boys who live in a community with high levels of ozone pollution are found to have a sample mean FEV1 of 1.98 liters. Can you conclude that the mean FEV1 in the high-pollution community differs from 2.1 liters? Use the =α0.10 level of significance and the P -value method with the TI-84 calculator.   Part: 0 / 4 0 of 4 Parts Complete   Part 1 of 4     State the appropriate null and alternate hypotheses. :H0   :H1   This hypothesis test is a ▼(Choose one) test.

Claim: The standard deviation of pulse rates of adult males is less than 10 bpm. For a random sample of 140 adult males, the pulse rates have a standard deviation of 9.3 bpm.

Shoulder height is known to be normally distributed with a mean of 56.65 inches for males and 52.5 inches for females. The males vary with a standard deviation of 2.46 inches and females at 2.49 inches.  find the z-score representing a male whose shoulder height is 49 inches    a standardized curve N(0,1) is shown below use this information to find an equivalent shoulder height for females and explain the relevance of this value and shading in the context of the problem

Pulse rates of adult men are approximately normal with a mean of 70 and a standard deviation of 8. Which choice correctly describes how to find the proportion of men that have a pulse rate greater than 78? (a) Find the area to the right of z = -1 under a standard normal curve. (b) Find the area to the right of z=1 under a standard normal curve. (c) Find the area to the left of z = 1 under a standard normal curve. (d) Find the area between z=-1 and z=1 under a standard normal curve. (e) None of the above

Total plasma volume is important in determining the required plasma component in blood replacement therapy for a person undergoing surgery. Plasma volume is influenced by the overall health and physical activity of an individual. Suppose that a random sample of 46 male firefighters are tested and that they have a plasma volume sample mean of x = 37.5 ml/kg (milliliters plasma per kilogram body weight). Assume that ? = 7.50 ml/kg for the distribution of blood plasma. d)Find the sample size necessary for a 99% confidence level with maximal margin of error E = 2.60 for the mean plasma volume in male firefighters. (Round up to the nearest whole number.) =__ male firefighters What price do farmers get for their watermelon crops? In the third week of July, a random sample of 45 farming regions gave a sample mean of x = $6.88 per 100 pounds of watermelon. Assume that ? is known to be $2.00 per 100 pounds. (a) Find a 90% confidence interval for the population mean price (per 100 pounds) that…

A normal distribution  with a mean of 2mm and a standard deviation of 0.05mm a randomly generated number of 0.71 , need to calculate the standardised Z value, from my notes Z = (actual value - mean)/standard deviation. do i take the randomly generated number of 0.81 as the actual value ?

Claim: The standard deviation of pulse rates of adult males is more than 12 bpm. For a random sample of 172 adult​ males, the pulse rates have a standard deviation of 11.5 bpm. Find the value of the test statistic?

Scores on a standardized exam are normally distributed with a mean of 517 and a standard deviation of 60. The figure below shows the distribution of the scores on a standardized exam. Cal- culate the shaded area under the curve. Express your answer in decimal form accurate to at least two decimal places. Answer: 397 457 The Scores on a Standardized Exan

Newspaper Reading Times A survey taken several years ago found that the average time a person spent reading the local daily newspaper was 10.8 minutes. The standard deviation of the population was 3  minutes. To see whether the average time had changed since the newspaper's format was revised, the newspaper editor surveyed 40  individuals. The average time that the 40  people spent reading the paper was 12.4  minutes. At α=0.10 , is there a change in the average time an individual spends reading the newspaper? Find the 90%  confidence interval of the mean. (a) State the hypothesis and identify the claim with the correct hypothesis. :H0     ▼(Choose one)   :H1     ▼(Choose one)   This hypothesis test is a ▼(Choose one) test.       (b)Find the critical value(s). Round the answer to 2  decimal places, if necessary.   Critical values:   (c)Compute the test value. Round the answer to at least 2 decimal places, if necessary. z=   (d)Make the decision.…