Computing p value method, A random sample of 51

Computing p value method

Reference no: EM13111769

A random sample of 51 observations was selected from a normally distributed population. The sample mean was = 88.6, and the sample variance was s2 = 38.2. Does the sample show sufficient reason to conclude that the population standard deviation is not equal to 8 at the 0.05 level of significance? Use the p-value method.

A researcher wishes to compare two different groups of students with respect to their mean time to complete a particular task. The time required is determined for each group. The data summary is given below. Test the claim at = 0.05, that there is no variance. Give the critical region, test statistic value, and conclusion for the F test.

n1=100, s1=20

n2=120, s2=34

The number of sit-ups that a person can do in one minute, both before and after a physical fitness course was recorded. The data is shown below for 10 randomly selected participants. Is there sufficient evidence to conclude that a significant amount of improvement took place? Assume variable is normally distributed.

Before 30 23 25 29 27 25 30 45 34 26

After 31 27 25 35 34 35 32 52 50 43

Reference no: EM13111769

Questions Cloud

How long would that helix be : If you were to take all the DNA molecules in your body and stitch them all together into one gigantic linear double helix, how long would that helix be.

Clarification of test of hypothesis : A neurologist wants to detect whether the mean response time for drug-injected rats differs from a control group not injected. The control group has the mean response time of 1.2 seconds.

Solving environmental chemistry problem : Assume that algae need carbon, nitrogen and phosphorus in the atomic ratio 106:16:1. What is the limiting nutrient in the lake that contains the following concentrations: total carbon = 20 mg/L, total N = 0.80 mg/L and total P = 0.16 mg/L.

Calculate the percentage of the bacterial genome : Sequencing of a new bacterial genome revealed a circular genome of 2.9 x 106 base pairs. Open reading frame (ORF) analysis indicated the presence of 2,120 ORFs that encode proteins with a median length of 270 amino acids (aa) and an average length..

Computing p value method : A random sample of 51 observations was selected from a normally distributed population. The sample mean was = 88.6, and the sample variance was s2 = 38.2.

What would be the nearest neighbor frequencies : The interaction between bases on different strands of DNA molecules depends somewhat on the identities of neighboring bases. For example, the melting temperature of an oligonucleotide with the sequence GGGGGAAAAA is different than that of GAGAGAGA..

Calculating the volume of co2 generated : The percent by mass of bicarbonate (HCO3-) in a certain Alka-Seltzer product is 32.5 %. Calculate the volume of CO2 generated at 37ºC and 1.00 atm when a person ingests a 3.29g tablet.

Find mean amount of coffee to be dispensed : Standard deviation of 0.02 ounce. You can permit cup to overfill 4% of the time. What amount must you set as mean amount of coffee to be dispensed?

Hypothesis testing for population temperature : In order to monitor the ecological health of the Florida Everglades, various measurements are recorded at different times. The bottom temperatures are recorded at the Garfield Bight station

User Account

All Pages