normal laboratory values

At the end of the reaction the residue left behind is copper sulphate, which is normally blue in color. In the presence of excess concentrated sulphuric acid, it may get dehydrated into grayish white colo..

The standard deviation of the hemoglobin values (g/100ml) of 10 children is 1.7. Find the 99% confidence interval for the variance and standard deviation. Assume that the variable is normally distributed. => 1.26 < σ 2 < 14.75 ; 1.12 < σ < 3.84 or 1.1 <..

A survey asks 'How much time do you spend in front of the TV in one week? Suppose the responses are normally distributed, the mean is 10 hours and the standard deviation is 2 hours. What value in hours is one standard deviation above the mean, and one standard deviation below th..

The value of P ( x > 2.0) is _______for a standard normal curve. => 0.4772 or 2.0 or 0.0228 or 0.5000..

Using the table for area under standard normal curve to find the value of P (- 1.6 < x < 1.2) . => 0.8301 or 0.4452 or 0.3849 or 0.0993..

What is the z value so that 95% of the area under the normal distribution curve lies to the left of it? => - 1.645 or 0.13 or 1.736 or 1.645..

Find the z value so that 20% of the area under the standard normal distribution curve lies to the left of it. => - 4.772 or 4.772 or - 0.84 or 0.84..

In the standard normal distribution, what is the value of z for the 73 rd percentile? => 0.73 or 1.1 or 0.23 or 0.613..

An ice cream manufacturer sells ice-creams in 3 sizes : large, normal and small packs in the ratio 3 : 5 : 2. The company distributes free samples of a new flavor in 250 large, 400 normal and 350 small packs as a trial. The company is interested to know and change accordingly th..

Sketch a normal curve for the distribution whose mean is 30 and standard deviation is 3.2. Label the x - axis values at one, two and three standard deviations from the mean. => Figure 1 or Figure 2..